Java：如何在打开另一个 JFrame 的同时关闭另一个？

Question

My program starts with a picture with a textfield in a JFrame. I want when the user types start it closes the picture JFrame and opens another JFrame with the main program. I've tried

processEvent(new WindowEvent(this, WindowEvent.WINDOW_CLOSING));

on the Image frame but it closes all the windows.

Answer 1

The method JFrame.setVisible can be used to hide or display the JFrame based on the arguments, while JFrame.dispose will actually "destroy" the frame, by closing it and freeing up resources that it used. Here, you would call setVisible(false) on the picture frame if you intend to reopen it, or call dispose() on the picture frame if you will not be opening it again, so your program can free some memory. Then you would call setVisible(true) on the main frame to make it visible.

Answer 2

you also can use this code

for example

  JFrame frame = new JFrame();
  frame.setDefaultCloseOperation(JFrame.HIDE_ON_CLOSE);

Answer 3

也许如果您将图片 JFrame 的默认关闭操作设置为EXIT_ON_CLOSE之外的其他内容，也许是DISPOSE_ON_CLOSE ，您可以防止您的应用程序在第二个 JFrame 出现之前关闭。

Answer 4

Here is my solution to this problem:

public void actionPerformed(ActionEvent e) {
    String userName =  textField.getText();
    String password = textField_1.getText();
    if(userName.equals("mgm") &&  password.equals("12345")) {            
         secondFrame nF = new secondFrame();

         nF.setVisible(false);
         dispose();          
    }   
    else 
    {
        JOptionPane.showMessageDialog(null, " Wrong password ");
    }
}

Answer 5

This post is a bit old but nevertheless.

If you initialize the form like that:

JFrame firstForm = new JFrame();

firstForm.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
firstForm.setSize(800, 600);
firstForm.setLocationRelativeTo(null);

firstForm.setVisible(true);

And for instance create or open another form by a button:

JFrame secondForm = new JFrame();

secondForm.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
secondForm.setSize(800, 600);
secondForm.setLocationRelativeTo(null);

secondForm.setVisible(true);

this.dispatchEvent(new WindowEvent(this, WindowEvent.WINDOW_CLOSING));

This will dispose and destroy the first window without exiting the program.
The key is to set setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE) .
It also raises the events (I've tested it with the WindowClosing event).

Answer 6

you also can use this :

opens_frame frameOld= new opens_frame();
            frameOld.setVisible(true);
            Closing_Frame.setVisible(false);
            Closing_Frame.dispose();

Answer 7

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

 dispose();//To close the current window

 YourClassName closeCurrentWindow = new YourClassName();
 closeCurrentWindow.setVisible(true);//Open the new window

}

Answer 8

I was searching for the same thing and found that using "this" is the best and easiest option. you can Use the following code: this.dispose();

Answer 9

For netbeans use the reference of the current Object and setVisible(false); for example

private void submitActionPerformed(java.awt.event.ActionEvent evt)
{                                
    // TODO add your handling code here:
    this.setVisible(false);//Closing the Current frame
    new login().setVisible(true);// Opening a new frame
}                                     

Answer 10

First call it

new Window().nextjframe.setVisible(true);
thisjframe.setVisible(false);

Answer 11

this is what i caame up for opening a new jframe wile closing the other one JFrame CreateAccountGUI = new JFrame();

     CreateAccountGUI.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
      CreateAccountGUI.setSize(800, 600);
      CreateAccountGUI.setLocationRelativeTo(null);
        CreateAccountGUI.setVisible(true);   
       this.setVisible(false);

Answer 12

if(username.equals("gaffar")&&password.equals("12345"))
    {
    label.setText("Be ready to continue");
    //Start of 2nd jframe
    NewJFrame1 n=new NewJFrame1();
     n.setVisible(true);
     //Stop code for ist jframe
     NewJFrame m=new NewJFrame();
     m.setVisible(false);
     dispose();
    }