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Henriquez10
Asked: 2020-05-06 01:55:04 +0800 CST 2020-05-06 01:55:04 +0800 CST

Limit the number of decimals

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If I want to enter the price $6.00, how do I limit the number of decimals?

Wearing:

 dts.setPrecio(Double.parseDouble(txtprecioExamen.getText()));

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java

1 Answers

  1. Best Answer

    Use a DecimalFormatter :

    double numero = 0.9999999999999;
DecimalFormat numeroFormateado = new DecimalFormat("#.00");
System.out.println(numeroFormateado.format(numero));

    So based on your code it would be something like this:

    Double valor= Double.parseDouble(txtprecioExamen.getText());
DecimalFormat numeroFormateado = new DecimalFormat("#.00");
dts.setPrecio(numeroFormateado.format(valor));

    It will give you "0.99". You can add or subtract 0 on the right hand side to get more or less decimal places.

    Or use '#'right to make the extra digits optional, as with #. ##(0.30) you would drop the trailing 0 to become (0.3).

    SO Source: How do I limit the number of decimals printed for a double?

    Another way to specify the number of Decimals can be like this:

    DecimalFormat formato = new DecimalFormat();
formato.setMaximumFractionDigits(2); //Con esta Linea.
String textoFormateado = formato.format(su_variable);

    I hope it helps you :)

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