How to go back to a JFrames in Java

Question

I have a button in a JFrame, if pressed, it takes us to another frame. I used this code:

private void jButton3ActionPerformed(java.awt.event.ActionEvent evt         


        

Answer 1

If you pass your MainForm to the SecondForm class (for example using a constructor parameter) the SecondForm instance can make the original MainForm instance visible again instead of creating a new one.

For example

public class SecondForm extends JFrame{
 private final MainForm mainForm;
 public SecondForm( MainForm form ){
   mainForm = form;
 }
 private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {                                         
  mainForm.setVisible(true);
  setVisible(false);
  dispose();
 }  
}

and in your MainForm class

private void jButton3ActionPerformed(java.awt.event.ActionEvent evt) {
 SecondForm secondform = new SecondForm( this );
 secondform.setVisible(true);
 setVisible(false);
 dispose();
}