getting value of jtext field

[papaboy2]

hi, i would like to ask how can i get the value of my text field and assign it to a double variable? thank a lot!

 

[jstreich]

Welp assume you have:

JTextField msg = new JTextField();

And an action listner listening to it:

ActionListner listener = new ActionListener()
{
  public void ActionPerformed()
  {
     String s = msg.getText();
     float f;
     try{
        f = Float.parseFloat(s);
     }catch(NumberFormatException e){
  [b]...[/b]
     }
  }
}

I was making a float of the string, but this should work, now you'd also want to force the user to only type valid numaric chars and the decimal point by implementing other actionlistners.

 

[jstreich]

make float double and Float Double...

 

[papaboy2]

ok thanks very much, just a follow up question how can i assign a double variable to a text field? i received an error when i code the ff., just starting to use java

sampleText.setText(DoubleVariable);

 

[chessbot]

Is it an object Double, or a primitive type double?
If it is an object, you can use

sampleText.setText("" + DoubleVariable.doubleValue()); // cast to a string

Otherwise, just use

sampleText.setText("" + DoubleVariable);

--Chessbot

"Violence is the last refuge of the incompetent." -- Asimov, Foundation

 

[papaboy2]

ok thanks very much, i appreciate ur help!