create method in GUI Builder

Question

this my GUI I designed by Netbean Builder

description http://up07.s-oman.net/1hGDmMy.png

I want when the user click calculate button it will add Rate Of Interest with Laon Amount and display total in total TextFeild .

this my calculate method

public void calculate(int b){

     int num1 = (Integer.parseInt(jTextField2.getText()));
      int num2 = (Integer.parseInt(jTextField4.getText()));
    b=num1+num2;

}

this code in button calculate

private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {
calculate(b);
}

and this code in total TextField

private void jTextField6ActionPerformed(java.awt.event.ActionEvent evt) {
 jTextField6.setText(String.valueOf(b));

} 

I got nothing When I tried So what the wrong??

Answer 1

I don't see the point of a the textfield that displays the result, needing an ActionListener . Try something like this, setting the text in the calculate method

public voi calculate(){
    int result;
    int num1 = (Integer.parseInt(jTextField2.getText()));
    int num2 = (Integer.parseInt(jTextField4.getText()));

    jTextField6.setText(String.valueOf(num1 + num2));
}

private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {
   calculate();
}

I have idea what b does, but I'm assuming you're trying to pass it by reference which won't work, so I took it out.