open a jFrame from another class

Question

I'm trying to open a JFrame which is in class B by clicking on a button which is present in Class A. I'm using JFrameForm in the project. How would I achieve this?

I tried using this code,it successfully opens the JFrame in Class B (JDBC_Trial) but doesn't close the existing one in class A

 private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {

     java.awt.EventQueue.invokeLater(new Runnable() {
     public void run() {
     new JDBC_Trial().setVisible(true);

     }
     }); 
     // TODO add your handling code here:
    }

I suggest not using more than 1 JFrame. It's considered bad practice. Instead, try using a [CardLayout](https://docs.oracle.com/javase/tutorial/uiswing/layout/card.html) — Jonah, Dec 26 '15 at 16:56
I also suggest posting some of the code that you have tried. We want to **help**, so you can **learn** not just do everything for you — Jonah, Dec 26 '15 at 17:02
Thank you for the suggestion.This i my first time in Stackoverflow.Sorry. — Manu, Dec 26 '15 at 18:05
1) For better help sooner, post a [MCVE] or [Short, Self Contained, Correct Example](http://www.sscce.org/). 2) Use a logical and consistent form of indenting code lines and blocks. The indentation is intended to make the flow of the code easier to follow! 3) See [The Use of Multiple JFrames, Good/Bad Practice?](http://stackoverflow.com/q/9554636/418556) — Andrew Thompson, Dec 27 '15 at 05:18

score 0 · Answer 1 · edited Dec 27 '15 at 05:19

0

Using a dispatch event allows you to choose what happens to the frame. Here I've closed it:

frame.dispatchEvent(new WindowEvent(frame, WindowEvent.WINDOW_CLOSING));
JDBC_Trial p = new JDBC_Trial();
p.setVisible(true);

edited Dec 27 '15 at 05:19

Andrew Thompson

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answered Dec 27 '15 at 00:16

TraineeProgrammer

15
6

in your initialize() class – TraineeProgrammer Dec 27 '15 at 08:10

score -1 · Answer 2 · answered Dec 26 '15 at 17:26

-1

Its not recommended, but it is possible:

Download download = new Download();
download.setDefaultCloseOperation(download.HIDE_ON_CLOSE);
download.setVisible(true);

Just put that on the event you want to call it on.

answered Dec 26 '15 at 17:26

Ammar Ahmad

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open a jFrame from another class

2 Answers2