Can you switch consoles in Eclipse?

What you can do is configure an external launcher for cmd or terminal, for this:

• Go to menu run->External Tools->External Tools Configurations
• Once there you create a new program and fill in the requested data

Here is a more detailed tutorial.

http://www.avajava.com/tutorials/lessons/how-do-i-open-a-windows-command-prompt-in-my-console.html

EDITED WITH HELPFUL ANSWER

@AugustoHerbel also, if what you want is to show the results by opening the console, you could do it through code, here is a small example:

public static void main(String[] args) { 
  try { 
    int a = 3, b = 2, suma = 0; 
    suma = a+b; 
    Runtime rt = Runtime.getRuntime(); 
    rt.exec("cmd.exe /c start echo suma: "+suma); 
  } catch (IOException e) { 
    // TODO Auto-generated catch block 
    e.printStackTrace(); 
  } 
}