Flowcou's questions

I am creating a plugin for a custom form in wordpress, but when I activate it, it does not create the table in the database, to say that I am new to programming in wordpress and I am very green.

function InscripSolabria_init()
{
    global $wpdb; // Este objeto global nos permite trabajar con la BD de WP
    // Crea la tabla si no existe
    $tabla_inscritos = $wpdb->prefix . 'inscritos';
    $tabla_actividades = $wpdb->prefix . 'actividades';
    $charset_collate = $wpdb->get_charset_collate();
    $query = "CREATE TABLE IF NOT EXISTS $tabla_inscritos (
        id_inscritos INT(9) NOT NULL AUTO_INCREMENT PRIMARY KEY,
        nombre varchar(40) NOT NULL,
        correo varchar(100) NOT NULL,
        telefono varchar(40) NOT NULL,
        FK_id_actividades INT(4) NOT NULL FOREIGN KEY
        )
         $charset_collate;";

         $query2 = "CREATE TABLE IF NOT EXISTS $tabla_actividades(
            id_actividades INT(9) NOT NULL AUTO_INCREMENT PRIMARY KEY,
            actividades varchar(100) NOT NULL,
            imagen varchar(100) NULL,
            horarios varchar(500)NULL
            REFERENCES(id_actividades) FOREIGN KEY inscritos(FK_id_actividades)
        )$charset_collate;";
    // La función dbDelta que nos permite crear tablas de manera segura se
    // define en el fichero upgrade.php que se incluye a continuación
    include_once ABSPATH . 'wp-admin/includes/upgrade.php';
    dbDelta($query,$query2);
}

I am creating an editable table with php and AJAX, I have done everything but it does not print the data in the table, I do not know why, because it does not give me any errors, I do not know if I have something wrong in the code, I clarify that in the part of SCRIPT.js where I do the edit script is missing things, can you help me?:

INDEX.php

<div class="panel panel-primary">
    <div class="panel-heading">Sample Data</div>
    <div class="panel-body">
     <div class="table-responsive">
      <table id="personal" class="table table-bordered table-striped">
       <thead>
        <tr>
        <th >Incidencia
      </th>
      <th >Departamento
      </th>
      <th >Usuario
      </th>
      <th >Estado
      </th>
      <th >Fecha de apertura
      </th>
        </tr>
       </thead>
       <tbody></tbody>
      </table>
     </div>
    </div>
   </div>
  </div>

DATA.php

<?php


include('dbconect.php');

$column = array("incidencia", "nom_dep", "usuario", "estado","fecha_inicio");

$query = "SELECT incidencia.*, usuarios.usuario, departamento.nom_dep,estado.estado FROM incidencia";

if(isset($_POST["search"]["value"]))
{
 $query .= '
 INNER JOIN usuarios ON usuarios.id = incidencia.usuario"%'.$_POST["search"]["value"].'%" 
 OR INNER JOIN departamento ON departamento.cod = incidencia.nom_dep LIKE "%'.$_POST["search"]["value"].'%" 
 OR INNER JOIN estado ON estado.id = incidencia.estado LIKE "%'.$_POST["search"]["value"].'%" 
 ';
}

if(isset($_POST["order"]))
{
 $query .= 'ORDER BY '.$column[$_POST['order']['0']['column']].' '.$_POST['order']['0']['dir'].' ';
}
else
{
 $query .= 'ORDER BY incidencia asc ';
}
$query1 = '';

if($_POST["length"] != -1)
{
 $query1 = 'LIMIT ' . $_POST['start'] . ', ' . $_POST['length'];
}

$statement = $conexion->prepare($query);

$statement->execute();

$number_filter_row = $statement->rowCount();

$statement = $conexion->prepare($query . $query1);

$statement->execute();

$result = $statement->fetchAll();

$data = array();

foreach($result as $row)
{
 $sub_array = array();
 $sub_array[] = $row['incidencia'];
 $sub_array[] = $row['nom_dep'];
 $sub_array[] = $row['usuario'];
 $sub_array[] = $row['estado'];
 $sub_array[] = $row['fecha_inicio'];
 $data[] = $sub_array;
}

function count_all_data($conexion)
{
 $query = "SELECT incidencia.*, usuarios.usuario, departamento.nom_dep,estado.estado FROM incidencia INNER JOIN usuarios ON usuarios.id = incidencia.usuario INNER JOIN departamento ON departamento.cod = incidencia.nom_dep INNER JOIN estado ON estado.id = incidencia.estado";
 $statement = $conexion->prepare($query);
 $statement->execute();
 return $statement->rowCount();
}

$output = array(
 'draw'   => intval($_POST['draw']),
 'recordsTotal' => count_all_data($conexion),
 'recordsFiltered' => $number_filter_row,
 'data'   => $data
);

echo json_encode($output);

?>

SCRIPT.js

$(document).ready(function() {

    var dataTable = $('#personal').DataTable({
        "language": {
            "url": "//cdn.datatables.net/plug-ins/1.10.20/i18n/Spanish.json"
        },
        "processing": true,
        "serverSide": true,
        "order": [],
        "ajax": {
            url: "datos.php",
            type: "POST"
        }
    });

    $('#personal').on('draw.dt', function() {
        $('#personal').Tabledit({
            url: 'edicion.php',
            dataType: 'json',
            columns: {
                identifier: [0, 'incidencia'],
                editable: [
                    [1, 'nom_dep'],
                    [2, 'usuario'],
                    [3, 'estado'],
                    [4, 'fecha_inicio']
                ]
            },
            restoreButton: false,
            onSuccess: function(data, textStatus, jqXHR) {
                if (data.action == 'delete') {
                    $('#' + data.idp).remove();
                    $('#personal').DataTable().ajax.reload();
                }
            }
        });
    });

});

I'm making a vertical menu which has a submenu with a transition in which the options come out from left to right, but when I put the label <a>on <li>it it doesn't make that transition and I don't know how to get it out, let's see if you can give me some help light.

ul {
    padding: 0;
    margin: 0;
}

li {
    list-style-type: none;
}

input[type='radio'] {
    display: none;
}

label {
    cursor: pointer;
}

 ::-webkit-scrollbar {
    display: none;
}

body .swanky .intro {
    float: right;
    color: white;
    width: 370px;
    top: 50px;
    position: fixed;
}

body .swanky .intro h1 {
    text-shadow: 0px 2px rgba(0, 0, 0, 0.26);
}

body .swanky .intro p {
    line-height: 20px;
    text-shadow: 0px 1px rgba(0, 0, 0, 0.26);
}

body .swanky_wrapper {
    height: auto;
    overflow: hidden;
    background: #ffffff;
    height: 100vh;
    width: 240px;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 2;
}

body .swanky_wrapper label {
    padding: 25px;
    float: left;
    height: 72px;
    border-bottom: 1px solid #131313;
    position: relative;
    width: 100%;
    color: #000000;
    transition: text-indent 0.15s, height 0.3s;
    box-sizing: border-box;
}

body .swanky_wrapper label img {
    margin-right: 10px;
    position: relative;
    top: 2px;
    width: 16px;
    color: black;
}

body .swanky_wrapper label span {
    position: relative;
    top: 2px;
    text-decoration: none;
}

body .swanky_wrapper label span a {
    position: relative;
    top: -3px;
    text-decoration: none;
    appearance: none;
    color: black;
}

body .swanky_wrapper label:hover {
    background: #2f7ef5;
    border-bottom: 1px solid #2A394F;
    text-indent: 4px;
}

body .swanky_wrapper label:hover .bar {
    width: 100%;
}

body .swanky_wrapper label .bar {
    width: 0px;
    transition: width 0.15s;
    height: 2px;
    position: absolute;
    display: block;
    background: #426dad;
    bottom: 0;
    left: 0;
}

body .swanky_wrapper label .lil_arrow {
    width: 5px;
    height: 5px;
    -webkit-transition: transform 0.8s;
    transition: transform 0.8s;
    -webkit-transition-timing-function: cubic-bezier(0.68, -0.55, 0.265, 1.55);
    border-top: 2px solid #15a4fa;
    border-right: 2px solid #15a4fa;
    float: right;
    position: relative;
    top: 6px;
    right: 2px;
    transform: rotate(45deg);
}

body .swanky_wrapper label .lil_arrow:hover {
    width: 5px;
    height: 5px;
    -webkit-transition: transform 0.8s;
    transition: transform 0.8s;
    -webkit-transition-timing-function: cubic-bezier(0.68, -0.55, 0.265, 1.55);
    border-top: 2px solid #ffffff;
    border-right: 2px solid #ffffff;
    float: right;
    position: relative;
    top: 6px;
    right: 2px;
    transform: rotate(45deg);
}

body .swanky_wrapper__content {
    position: absolute;
    display: none;
    overflow: hidden;
    left: 0;
    width: 100%;
}

body .swanky_wrapper__content li {
    width: 100%;
    opacity: 0;
    left: -100%;
    background: #15a4fa;
    padding: 25px 0px;
    text-indent: 25px;
    box-shadow: 0px 0px #126CA1 inset;
    transition: box-shadow 0.3s, text-indent 0.3s;
    position: relative;
}

body .swanky_wrapper__content li:hover {
    background: #0c93e4;
    box-shadow: 3px 0px #126CA1 inset;
    transition: box-shadow 0.3s linear, text-indent 0.3s linear;
    text-indent: 31px;
}

body .swanky_wrapper__content li a {
    width: 100%;
    opacity: 0;
    left: -100%;
    background: #15a4fa;
    padding: 25px 0px;
    text-indent: 25px;
    box-shadow: 0px 0px #126CA1 inset;
    transition: box-shadow 0.3s, text-indent 0.3s;
    position: relative;
    text-decoration: none;
    color: black;
}

body .swanky_wrapper__content li a:hover {
    background: #0c93e4;
    box-shadow: 3px 0px #126CA1 inset;
    transition: box-shadow 0.3s linear, text-indent 0.3s linear;
    text-indent: 31px;
    text-decoration: none;
    color: black;
}

body .swanky_wrapper__content .clear {
    clear: both;
}

input[type='radio']:checked+label .swanky_wrapper__content {
    display: block;
    top: 68px;
    border-bottom: 1px solid #212e41;
}

input[type="radio"]:checked+label>.lil_arrow {
    -webkit-transition: -webkit-transform 0.8s;
    transition: transform 0.8s;
    -webkit-transition-timing-function: cubic-bezier(0.68, -0.55, 0.265, 1.55);
    -webkit-transform: rotate(135deg);
    -ms-transform: rotate(135deg);
    transform: rotate(135deg);
    border-top: 2px solid white;
    border-right: 2px solid white;
}

input[type='radio']:checked+label {
    height: 200px;
    background: #426dad;
    text-indent: 4px;
    transition-property: height;
    transition-duration: 0.6s;
    -webkit-transition-timing-function: cubic-bezier(0.68, -0.55, 0.265, 1.55);
    color: white;
}

input[type='radio']:checked+label .bar {
    width: 0;
}

input[type='radio']:checked+label:nth-of-type(1) {
    animation: in 0.15s 0.575s forwards;
    -webkit-transition-timing-function: cubic-bezier(0.68, -0.55, 0.265, 1.55);
    -moz-animation: in 0.15s 0.575s forwards;
    -moz-transition-timing-function: cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

input[type='radio']:checked+label:nth-of-type(2) {
    animation: in 0.15s 0.7s forwards;
    -webkit-transition-timing-function: cubic-bezier(0.68, -0.55, 0.265, 1.55);
    -moz-animation: in 0.15s 0.7s forwards;
    -moz-transition-timing-function: cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

input[type='radio']:checked+label:nth-of-type(3) {
    animation: in 0.15s 0.825s forwards;
    -webkit-transition-timing-function: cubic-bezier(0.68, -0.55, 0.265, 1.55);
    -moz-animation: in 0.15s 0.825s forwards;
    -moz-transition-timing-function: cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

input[type='radio']:checked+label:nth-of-type(4) {
    animation: in 0.15s 0.95s forwards;
    -webkit-transition-timing-function: cubic-bezier(0.68, -0.55, 0.265, 1.55);
    -moz-animation: in 0.15s 0.95s forwards;
    -moz-transition-timing-function: cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

@keyframes in {
    from {
        left: -100%;
        opacity: 0;
    }
    to {
        left: 0;
        opacity: 1;
    }
}

<div class="menuVertical">
      <div class="swanky">
      
      <div class="swanky_wrapper">
      <header>
            <img src="img/logo-azul.png" />
        <br>
        <br>
      </header>
        <label for="Dashboard">
          <img src="https://img.icons8.com/material-outlined/50/000000/dog-house.png"/>
          <span><a href="principal.php">Inicio</a></span>
          
        </label>
        <input id="Sales" name="radio" type="radio"></input>
        <label for="Sales">
          <img src="https://img.icons8.com/material-outlined/24/000000/warning-shield.png"/>
          <span>Incidencia</span>
          <div class="lil_arrow"></div>
          <div class="bar"></div>
          <div class="swanky_wrapper__content">
            <ul>
              <li><a href="#">Crear Incidencia</a></li>
              <li><a href="#">Buscar Incidencia</a></li>
            </ul>
          </div>
        </label>
        <label for="Messages">
          <img src="https://img.icons8.com/material-rounded/24/000000/server.png"/>
          <span>Servidores</span>
        </label>
        
        <label for="Users">
          <img src="https://img.icons8.com/material-outlined/24/000000/chat.png"/>
          <span>Chat</span>
        
        </label>
      </div>
      <!--/////////// End Dropdown ////////////
      -->
    </div>
    </div>

    

Let's see if I explain myself well. I am doing a class project in which I want to make each user have a unique alphanumeric autoincrementing ID done in code. For example:

ES0000001

And that this is increased every time a user registers, is this possible? I have tried doing $number = 0000001; and $letter = ES; and then join it in $ID = $letter + $number;

But I get the error Warning: A non-numeric value encountered in D:\XAMPP\xampp\htdocs\DawProject\register.php

Code

<?php session_start();

    if(isset($_SESSION['usuario'])) {
        header('location: index.php');
    }



    if ($_SERVER['REQUEST_METHOD'] == 'POST'){

        $email = $_POST['email'];
        $usuario = $_POST['usuario'];
        $password = $_POST['password'];
        $password2 = $_POST['password2'];
        $letra = "ES";
        $numero = 000001;
        $id = ($letra + $numero);
        $password = hash('sha512', $password);
        $password2 = hash('sha512', $password2);

        $error = '';

        if (empty($email) or empty($usuario) or empty($password) or empty($password2)){

            $error .= '<i>Favor de rellenar todos los campos</i>';
        }else{
            try{
                $conexion = new PDO('mysql:host=localhost;dbname=service_ticketing', 'root', '');
            }catch(PDOException $prueba_error){
                echo "Error: " . $prueba_error->getMessage();
            }

            $statement = $conexion->prepare('SELECT * FROM login WHERE usuarios = :usuario LIMIT 1');
            $statement->execute(array(':usuario' => $usuario));
            $resultado = $statement->fetch();


            if ($resultado != false){
                $error .= '<i>Este usuario ya existe</i>';
            }

            if ($password != $password2){
                $error .= '<i> Las contraseñas no coinciden</i>';
            }


        }

        if ($error == ''){
            $numero++;
            $statement = $conexion->prepare('INSERT INTO login (id, email, usuario, password) VALUES (:id, :email, :usuario, :password)');
            $statement->execute(array(
                'id'=>$id,
                ':email' => $email,
                ':usuario' => $usuario,
                ':password' => $password

            ));

            $error .= '<i style="color: green;">Usuario registrado exitosamente</i>';
        }
    }


    require 'frontend/register-vista.php';

?>

I am doing a class exercise, it consists of doing a multiple drag and drop, displaying the data and the images and the only thing missing is to be able to display the images that I upload to that input, I have managed to make it display one, but Of course, when I upload variables, only one is displayed. I leave the code.

function GetFileInfo() {
  var fileInput = document.getElementById("fileInput");
  var archivoRuta = fileInput.value;
  var extPermitidas = /(.PNG|.png|.jpg|.JPG|.JPEG|.jpeg)$/i;
  var message = "";
  if ('files' in fileInput) {
      if (fileInput.files.length == 0 || !extPermitidas.exec(archivoRuta)) {
          message = "Por favor eliga uno o más archivos.";
          if (!extPermitidas.exec(archivoRuta)) {
              message = "Por favor, asegurese de que eliga una imagen";
          }
      } else {
          if (fileInput.files && fileInput.files[0, 1]) {
              var visor = new FileReader();
              visor.onload = function(e) {
                  document.getElementById('visorArchivo').innerHTML =
                      '<embed src="' + e.target.result + '" width="500" height="375" />';

              };
              visor.readAsDataURL(fileInput.files[0, 1]);
          }
          for (var i = 0; i < fileInput.files.length; i++) {
              message += "<br /><b>" + (i + 1) + ". file</b><br />";
              var file = fileInput.files[i];
              if ('name' in file) {
                  message += "Nombre: " + file.name + "<br />";
              } else {
                  message += "Nombre: " + file.fileName + "<br />";
              }
              if ('size' in file) {
                  message += "Tamaño: " + file.size + " bytes <br />";
              } else {
                  message += "Tamaño: " + file.fileSize + " bytes <br />";
              }
              if ('mediaType' in file) {
                  message += "tipo: " + file.mediaType + "<br />";
              }
          }
      }
  } else {
      if (fileInput.value == "") {
          message += "Selecciona una o más imagenes.";
          message += "<br />Use el control o shift para seleccionar varias imagenes";
      } else {
          message += "Tu navegador no soporta el programa";
          message += "<br />Fila seleccionada " + fileInput.value;
      }
  }

  var info = document.getElementById("info");
  info.innerHTML = message;
}



   

 <body onload="GetFileInfo ()">
    <form>
        <div class="inf__drop-area">
            <span class="inf__btn">Elige imagen</span>
            <input type="file" id="fileInput" name="files" multiple="multiple" size="60" onchange="GetFileInfo ()" />
        </div>
        <br>
        <br>
        <div id="visorArchivo">
            <!--Aqui se desplegará el fichero-->
        </div>
        <div id="info" style="margin-top:30px"></div>
    </form>

</body>

I am doing a class exercise, where we have been asked to make a student class with three variables, one of them a literal object, my question is when accessing that literal object to be able to change the parameters, that is, how to change the StudentTest.mathematical.notes? how is it done? Because when doing this it tells me that mathematics is not defined.

I leave you what I have done

class Alumno {
    constructor(nombre, apellido, notas) {
        this._nombre = nombre || 'Sin nombre',
            this._apellido = apellido || 'Sin apellido',
            this._notas = notas || {
                Matematicas: generaAleatorio(0, 10),
                Lengua: generaAleatorio(0, 10),
                Fisica: generaAleatorio(0, 10),
                Ingles: generaAleatorio(0, 10),
                Musica: generaAleatorio(0, 10)
            }

    }
}

function generaAleatorio(min, max) {
    return Math.round(Math.random() * (max - min) + min);

}
var AlumnoPrueba = new Alumno();
AlumnoPrueba.nombre = "Paco";
AlumnoPrueba.apellido = "Martinez";
AlumnoPrueba.notas;
console.log(AlumnoPrueba);

I am doing an exercise where I must show in a table the names of the students, subjects and their grades, I don't know if what I have done is correct. What I am trying to do is an array where the names of the students are and another associative two-dimensional array, where the grades and subjects are, wanting to make a map so that the key is student and the value is subjects, and print it in a table

but I get absolutely nothing when I run the program, no console errors or anything. I know I'm doing the formal, but I don't know how to do it so that it collects everything.

    var map = new Map();
    var alumnos = ["Juan", "Pepe", "Alba", "Maria", "Alvaro", "Roberto", "Laura", "Daniel", "Cristina", "David"];
    var asignaturas = new Array();
    asignaturas[0] = new Array({ "Lenguaje": "4", "Matematicas": "7", "Musica": "8", "Ingles": "9", "Fisica": "5" });
    asignaturas[1] = new Array({ "Lenguaje": "4", "Matematicas": "7", "Musica": "8", "Ingles": "9", "Fisica": "5" });
    asignaturas[2] = new Array({ "Lenguaje": "4", "Matematicas": "7", "Musica": "8", "Ingles": "9", "Fisica": "5" });
    asignaturas[3] = new Array({ "Lenguaje": "4", "Matematicas": "7", "Musica": "8", "Ingles": "9", "Fisica": "5" });
    asignaturas[4] = new Array({ "Lenguaje": "4", "Matematicas": "7", "Musica": "8", "Ingles": "9", "Fisica": "5" });
    asignaturas[5] = new Array({ "Lenguaje": "4", "Matematicas": "7", "Musica": "8", "Ingles": "9", "Fisica": "5" });
    asignaturas[6] = new Array({ "Lenguaje": "4", "Matematicas": "7", "Musica": "8", "Ingles": "9", "Fisica": "5" });
    asignaturas[7] = new Array({ "Lenguaje": "4", "Matematicas": "7", "Musica": "8", "Ingles": "9", "Fisica": "5" });
    asignaturas[8] = new Array({ "Lenguaje": "4", "Matematicas": "7", "Musica": "8", "Ingles": "9", "Fisica": "5" });
    asignaturas[9] = new Array({ "Lenguaje": "4", "Matematicas": "7", "Musica": "8", "Ingles": "9", "Fisica": "5" });
    
    map.set(alumnos, asignaturas);
    document.write("<table bordes=1>");
    for (i = 0; i < map; i++) {
        document.write("<tr>");
        document.write("<td>i</td>");
        document.write("</tr>");
    }
    document.write("</table>");

I'm doing a JS exercise where they ask me to enter a password with a requirement and that if the third time I try the goal wrong, you can't continue entering data in the input. The problem is that I have it with real-time validation, which until you enter the word correctly, is always invalid. I leave my code.

document
    .getElementById('campo')
    .addEventListener('input', function(evt) {
        const campo = evt.target,
            valido = document.getElementById('campoOK'),

            regex = /^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)(?=.*[$@$%*&\-\_])[A-Za-z\d$@$%*&\-\_]{8,16}$/;

        if (regex.test(campo.value)) {
            valido.innerText = "válido";

        } else {
            valido.innerText = "incorrecto";

        }
    });

What would it be like to delete data in an array using input? All this with the session variable to have to make a hidden array so that when refreshing I don't delete it. I understand that it would be something like that, even though it's wrong since it doesn't work

 if(isset($_POST['eliminar'])){
    $verboESP = $_POST['verboESP'];


        unset($verbosOculto[$_POST['verboESP']]);
        $verbosOculto = array_values($verbosOculto);



        header('Location: diccionario.php'); 
    }

with the input

<input type="text" name="verboESP">

        <input type="submit" name="eliminar">

I am doing a class exercise and I am having a problem when trying to do a validation so that when I enter a data through the console it validates whether or not it is inside that ArrayList. I have tried to do it with a .contains(product)= = code (probably it is poorly composed). I leave you the statement first:

loadArticle : Includes the data request of the object to load in the collection, validates the received data, the creation of the Article type object, checks that there is no product already in the collection with the same code and adds the created object to the collection .

Upload Article code:

(the arraylist is called a collection) private ArrayList collection = new ArrayList();

public String cargarArticulo(){
    String codigo=null;
    String descripcion=null;
    String existencias=null;
    String cadena = "Código del producto: " + codigo + "Descripción del producto: " + descripcion + "Total de existencias: " + existencias;
    boolean errorProducto = false;
    try{
        //Pedimos que se introduzca el código del producto
    do{
        System.out.println("Introduzca el código del artículo: ");
        codigo = teclado.nextLine();
        errorProducto = ValidarCodigo(codigo);
        System.out.println("Introduzca la descripción del producto: ");
        descripcion = teclado.nextLine();
        errorProducto = ValidarDescripcion(descripcion);
        System.out.println("Introduzca las existencias del producto: ");
        existencias = teclado.nextLine();
        errorProducto = ValidarExistencias(existencias);
        Articulo producto = new Articulo();
        producto.setCodigo(codigo);
        producto.setDescripcion(descripcion);
        producto.setExistencias(existencias);
        if(coleccion.contains(codigo)==codigo){
            System.out.println("");
        }
        System.out.println("Código añadido");
        coleccion.add(producto);
    }while(errorProducto);


    }catch(Exception e){

    }
    return cadena;
    }

I am with a class exercise where we must store items in an arraylist.

When adding those articles through objects, it gives me an error that it could not be converted to String. I don't understand why it puts that, since the three attributes are String. I give you what I have. Please help me find the bug or fix it. Thank you very much in advance.

Item Class:

    public class Articulo {
    //Creamos los atributos
    private String codigo;
    private String descripcion;
    private String existencias;
    //Creamos los Setter y Getters
    public String getCodigo() {
        return codigo;
    }

    public void setCodigo(String codigo) {
        this.codigo = codigo;
    }

    public String getDescripcion() {
        return descripcion;
    }

    public void setDescripcion(String descripcion) {
        this.descripcion = descripcion;
    }

    public String getExistencias() {
        return existencias;
    }

    public void setExistencias(String existencias) {
        this.existencias = existencias;
    }
    //Contructor sin parametos inicializando codigo
    public Articulo() {
        this.codigo = "XX.000X";
    }
    //Contructor con parametros y los tres atributos
    public Articulo(String codigo, String descripcion, String existencias) {
        this.codigo = codigo;
        this.descripcion = descripcion;
        this.existencias = existencias;
    }
    //Contructor con parametros, dos atributos y el tercero inicializandolo
    public Articulo(String codigo, String descripcion) {
        this.codigo = codigo;
        this.descripcion = descripcion;
        this.existencias = "";
    }
    //Copia objeto
    public Articulo(Articulo copiaArticulo) {
        this.codigo=copiaArticulo.codigo;
        this.descripcion=copiaArticulo.descripcion;
        this.existencias=copiaArticulo.existencias;
    }

    public static boolean ValidarCodigo(String codigo) {
        boolean codigoValido;
        Pattern pat = Pattern.compile("^[A-Z]{2}[.]{1}[0-9]{1,3}[a-zA-X]{1,}$");

        Matcher mat = pat.matcher(codigo);
        if (mat.matches()) {
            codigoValido = true;
        } else {
            System.out.println("No has introducido bien el codigo, por favor intentelo de nuevo");
            codigoValido = false;
        }
        return codigoValido;
    }

    public static boolean ValidarDescripcion(String descripcion) {
        boolean descripcionValida;

        Pattern pat1 = Pattern.compile("^[A-Za-z\\s]{3,15}$");
        Matcher mat1 = pat1.matcher(descripcion);
        if (mat1.matches()) {
            descripcionValida = true;
        } else {
            System.out.println("No has introducido bien la descripción, por favor intentelo de nuevo. Recuerda que debe tener un mínimo de tres letras y máximo de 15");
            descripcionValida = false;
        }
        return descripcionValida;
    }

    public static boolean ValidarExistencias(String existencias) {
        boolean existenciasValida;

        Pattern pat2 = Pattern.compile("^[0-9]{1,3}$");
        Matcher mat2 = pat2.matcher(existencias);
        if (mat2.matches()) {
            existenciasValida = true;
        } else {
            System.out.println("El número introducido no es correcto, recuerda que debe ser positivo y que esté entre 1 y menos de 1000 ");
            existenciasValida = false;
        }
        return existenciasValida;
    }


}

Warehouse Class:

public class Almacen {
   private ArrayList<String> coleccion = new ArrayList(); 
    public static void main(String[] args) {
     //Objeto sin parametros
    Articulo prueba = new Articulo();
    prueba.setCodigo("XX.000X");
    prueba.setDescripcion(null);
    prueba.setExistencias("0");
    //Contructor con tres paramentros
    Articulo tornillos = new Articulo("AA.123A","tornillos", "9");
    //objeto con dos parametros
    Articulo tuercas = new Articulo("BB.111B","tuercas");
    tuercas.setExistencias("500");
    //objeto copia
    Articulo arandelas = new Articulo (tornillos);
    arandelas.setCodigo("CC.222C");
    arandelas.setDescripcion("arandelas");
    arandelas.setExistencias("500");
    coleccion.add(prueba);
}
}

I am trying to do the exercise that they have sent us in class, I put the statement.

In the Runner class:

Attributes(private)

name: partner name (string)

nif: partner nif (string)

age: runner's age (integer numeric value)

numDorsal: runner number (integer numerical value). static attribute.

dorsalActivo: that indicates if the bib is active (boolean variable)

numMinutes: number of minutes it took the runner to complete the marathon. When creating each object of this type, it will be initialized to 0. Throughout the program it will be taken into account that the time cannot be less than 0 and the marathon cannot last more than 12 hours.

Methods (accessed from the same package)

· Parameterless Runner object constructor.

· Constructor of objects Constructor with three arguments that gives value to the first attributes.

· Runner object constructor with two arguments, nif and age, which you always name “Guest”.

· Corridor Object Copy Constructor.

My question: Do I have to make four builders 3 runner and one builder? How do I get to do all four options, knowing that I can't do multiple constructors with parameters? At least the program fails me.

I leave you my code:

public class Corredor {
    private String nombre;
    private String nif;
    private int edad;
    private static int numDorsal;
    private boolean dorsalActivo;
    private int numMinutos;

    public String getNombre(){
        return nombre;
    }
    public void setNombre(String nombre){
        this.nombre=nombre;
    }
    public String getNif(){
        return nif;
    }
    public void setNif(String nif){
        this.nif=nif;
    }
    public int getEdad(){
        return edad;
    }
    public void setEdad(int edad){
        this.edad=edad;
    }
    public int getNumdorsal(){
        return numDorsal;
    }
    public void setNumdorsal(int numDorsal){
        this.numDorsal=numDorsal;
    }
    public boolean getDorsalActivo(){
        return dorsalActivo;
    }
    public void setDorsalActivo(boolean dorsalActivo){
        this.dorsalActivo=dorsalActivo;
    }
    public int getNumMinutos(){
        return numMinutos;
    }
    public void setNumMinutos(int numMinutos){
        this.numMinutos=numMinutos;
    }
    //sin argumentos
    public Corredor(){

    }
    //con argumentos
    Corredor(String nombre, String nif, int edad, int numDorsal, boolean dorsalActivo, int numMinutos){
        this.nombre=nombre;
        this.nif=nif;
        this.edad=edad;
        this.numDorsal=numDorsal;
        this.dorsalActivo=dorsalActivo;
        this.numMinutos=numMinutos;
    }

    //con los tres primeros arguemntos y aqui es donde me da fallo dado que la clase corredor está declarada
    public Corredor(){
        nombre="Pepe";
        nif="740325679E";
        edad=57;
    }
}

I am doing a class exercise, I put the statement and I explain.

Make a program that allows us to accept numbers greater than or equal to zero by keyboard until a negative number is entered. At that time, the following menu will be displayed on the screen:

1-Suma de los números pares introducidos.
2-Media de los números pares introducidos. (con dos decimales)
3-Mayor nº impar introducido.
4-Cuántos números hemos introducido.
5-Cuantos números de los introducidos han sido ceros, cuántos han sido pares y cuantos impares.
6.-Salir.

The menu (with the values ​​already entered) will be repeated until the user decides to “Exit”.

In the first step I don't know if I have to accumulate the numbers entered, I have put it that way, even though I still have it wrong, I have saved them in a arrayfor the menu. The thing is that I'm trying to do the switchwith the menu, but I don't know how to do those operations, if they go inside the case or outside. My second doubt is how to visualize the options for the user before clicking on one, see what he does previously. I leave you what I have done.

public class Ejercicio4 {

    public static void main(String[] args) {
        System.out.println("Progama que nos permite aceptar numeros mayores o iguales a cero y si no, aparecerá un menú.");
        System.out.println("----------------------------------------------------------------------------------------------------------------------------------------\n");
        Scanner teclado;
        int numero;
        List<Integer> lista = new ArrayList<Integer>();

        int salir = 6;
        int opcion = 0;
        try {

            do {
                System.out.print("Introduce un número: ");
                teclado = new Scanner(System.in);
                numero = teclado.nextInt();
                if (numero >= 0) {

                    lista.add(numero);
                }

            } while (numero >= 0);
            if (numero < 0) {
                while (opcion != salir) {
                    System.out.println("--------- Menú de opciones --------");
                    System.out.println("1-Suma de los números pares introducidos ");
                    System.out.println("2-Media de los números pares introducidos. (con dos decimales) ");
                    System.out.println("3-Mayor nº impar introducido. ");
                    System.out.println("4-Cuántos números hemos introducido. ");
                    System.out.println("5-Cuantos números de los introducidos han sido ceros, cuántos han sido pares y cuantos impares ");
                    System.out.println("6-Salir ");

                    teclado = new Scanner(System.in);
                    opcion = teclado.nextInt();
                    switch (opcion) {
                        //1-Suma de los números pares introducidos
                        case 1:

                            int suma = 0;
                            for (int i = 0; i < lista.size(); i++) {

                                int num = lista.get(i);
                                if (num % 2 == 0) {
                                    suma = num + suma;
                                }
                            }
                            System.out.println("La suma de los números pares introducidos son" + suma);
                            break;

                        //2-Media de los números pares introducidos. (con dos decimales)
                        case 2:
                            double media = 0;
                            int x = 0;
                            suma = 0;
                            for (int i = 0; i < lista.size(); i++) {
                                int num = lista.get(i);

                                if (num % 2 == 0) {
                                    suma = num + suma;
                                    x++;
                                }

                            }
                            media = suma / x;
                            System.out.println("La media de los números pares introducidos son " + Math.round(media * 100d) / 100d + "\n");

                            break;

                        //3-Mayor nº impar introducido.
                        case 3:
                            suma = 0;
                            int max = 0;
                            for (int i = 0; i < lista.size(); i++) {

                                int num = lista.get(i);
                                if (!(num % 2 == 0)) {
                                    if (num > max) {
                                        max = num;
                                    }
                                }
                            }
                            System.out.println("La media de los números pares introducidos son " + max);
                            break;
                        //4-Cuántos números hemos introducido.
                        case 4:
                            int numeros = 0;
                            for (int i = 0; i < lista.size(); i++) {

                                numeros++;
                            }
                            System.out.println("Cuantos números hemos introducido " + numeros);

                            break;
                        //5-Cuantos números de los introducidos han sido ceros, cuántos han sido pares y cuantos impares.
                        case 5:

                            int pares = 0;
                            int impares = 0;
                            int ceros =0;
                            int cero=0;
                            for (int i = 0; i < lista.size(); i++) {

                                int num = lista.get(i);
                                if (num % 2 == 0) {
                                    pares++;
                                }else if(!(num % 2 == 0)&& num!=0){
                                impares++;
                                } 
                                 if (num==0){
                                ceros++;
                                } 
                                }
                            System.out.println("Los números pares han sido : " + pares);
                            System.out.println("Los números impares han sido : " + impares);
                            System.out.println("Los números cero han sido : " + ceros);
                            break;
                        //6.-Salir.
                        case 6:

                            break;
                    }
                }

            }

        } catch (InputMismatchException ime) {
            System.out.println("¡Cuidado! Solo puedes insertar números. ");

        }

    }

}`introducir el código aquí`
        public static void main(String[] args) {
            System.out.println("Progama que nos permite aceptar numeros mayores o iguales a cero y si no, aparecerá un menú.");
            System.out.println("----------------------------------------------------------------------------------------------------------------------------------------\n");
            Scanner teclado;
            int numero;
            List lista = new ArrayList();

            int salir = 6;
            int opcion = 0;
            try {
                System.out.print("Introduce un número: ");
                teclado = new Scanner(System.in);
                numero = teclado.nextInt();
                do {

                    lista.add(numero);
                } while (numero >= 0);
                if (numero < 0) {
                    while (opcion != salir) {
                        System.out.print("Elige una opción: ");

                        switch (opcion) {
                            //1-Suma de los números pares introducidos
                            case 1: 
                            System.out.print("La suma de los números pares introducidos son" +(lista%2==0) +lista);
                            break;

                            //2-Media de los números pares introducidos. (con dos decimales)
                            case 2: break;  
                            //3-Mayor nº impar introducido.
                            case 3: break;    
                            //4-Cuántos números hemos introducido.
                            case 4: break;
                            //5-Cuantos números de los introducidos han sido ceros, cuántos han sido pares y cuantos impares.
                            case 5: break;   
                            //6.-Salir.
                            case 6: break;
                        }
                    }

                }
            } catch (InputMismatchException ime) {
                System.out.println("¡Cuidado! Solo puedes insertar números. ");

            }

        }

    }

I am a novice in this java and I just started classes, they have sent us this exercise:

Exercise 3

1. Design a called class Relojwith the integer attributes: hora(24 hours), minutoand segundo, and the following methods:

2. A constructor that initializes attributes to values ​​passed as parameters.

3. A method called Increment that increments the time by one second.

For example:

17:53:59will be17:54:00

17:59:59will be18:00:00

4.A method called Decrement that decreases the time by one second.

For example:

17:53:00will be17:52:59

17:00:00will be16:59:59

5.A method called Hora12that converts to Stringthe time by concatenating its attributes and returns the string in the 12-hour format ( hh:mm:ss AM/PM)

AM: (until 12 noon), PM (from 12 to 24 hours)

This is my code, Class Reloj:

public class Reloj {
    int modo,hora, minutos,segundos;

    int getmodo(){

    return modo;

    }


    public void setmodo(int modo){

    this.modo=modo;
    }

    int gethora(){

    return hora;

    }


    public void sethora(int hora){

    this.hora=hora;
    }

    public int getminutos(){

    return minutos;

    }


    public void setminutos(int minutos){

    this.minutos=minutos;
    }

    public  int getsegundos(){

    return segundos;

    }


   public  void setsegundos(int segundos){

    this.segundos=segundos;
    }

   public  Reloj(){
    modo=24; /*por defecto ponemos 24horas*/
    hora=0;
    minutos=0;
    segundos=0;


    }

    public Reloj( int h, int m, int s){
        this.modo=24;
        this.hora=h %24;
        this.minutos=m % 60;
        this.segundos=s % 60;

    }


   public void ponerEnHora(int md, int hh, int mm, int ss){
      modo=md;
      hora=hh % 24;
      minutos=mm % 60;
      segundos=ss % 60;
   }

   public void incrementar(){
    segundos++;
    if (segundos==60){
    segundos=0;
    minutos++;
    if(minutos==60){
    minutos=0;
    hora=(hora+1)%24;
    }

    }

    }

   public void decrementa(){
    segundos--;
    if(segundos<00){
        segundos=59;
        minutos--;
        if(minutos<00){
        minutos=59;
        hora=(hora-1) %24;

        }
    }
   }
   public String verHora(){

       String hms="Son las ";

       if (modo==12){//modo 12 horas    
           hms+=(hora>12)?hora-12:hora;
           hms+= ":"+minutos+":"+segundos;
           hms+=(hora>=12)?"pm":"am";

       }else{//modo 24h
       hms+=hora+":"+minutos+":"+segundos;
       }
   return (hms);
   }
}

Clock class MAIN:

public class Relojes {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        Reloj reloj1 = new Reloj();
        reloj1.ponerEnHora(24,17,10,10);
        System.out.println(reloj1.verHora());
        reloj1.incrementar();
        System.out.println(reloj1.verHora());
        reloj1.decrementa();
        System.out.println(reloj1.verHora());

    }

}

I don't get the hours in 12H mode, everything else works, but it doesn't work for me to print the 12h mode with AM or PM, let's see if you can give me a hand.