[英]Close one JFrame without closing another?
I want to display two (or more) JFrames at the same time. 我想同时显示两个(或更多) JFrame 。
When I close one of them (use the default close button), the other frames should still be visible. 当我关闭其中一个(使用默认关闭按钮)时,其他帧仍应可见。
How can I do that? 我怎样才能做到这一点?
If you do not want your application to terminate when a JFrame
is closed, use 如果您不希望应用程序在关闭
JFrame
时终止,请使用
setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE)
instead of 代替
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
From the documentation : 从文档 :
DO_NOTHING_ON_CLOSE
(defined in WindowConstants): Don't do anything; DO_NOTHING_ON_CLOSE
(在WindowConstants中定义):不要做任何事情; require the program to handle the operation in the windowClosing method of a registered WindowListener object. HIDE_ON_CLOSE
(defined in WindowConstants): Automatically hide the frame after invoking any registered WindowListener objects. HIDE_ON_CLOSE
(在WindowConstants中定义):在调用任何已注册的WindowListener对象后自动隐藏框架。 DISPOSE_ON_CLOSE
(defined in WindowConstants): Automatically hide and dispose the frame after invoking any registered WindowListener objects. DISPOSE_ON_CLOSE
(在WindowConstants中定义):在调用任何已注册的WindowListener对象后自动隐藏和DISPOSE_ON_CLOSE
框架。 EXIT_ON_CLOSE
(defined in JFrame): Exit the application using the System exit method. EXIT_ON_CLOSE
(在JFrame中定义):使用System exit方法退出应用程序。 Use this only in applications. This was my answer before the question was clarified, might still be useful: 在澄清问题之前,这是我的答案,可能仍然有用:
You can use setVisible(false)
on your JFrame
if you want to display the same frame again. 如果要再次显示相同的帧,可以在
JFrame
上使用setVisible(false)
。
Otherwise call dispose()
to remove all of the native screen resources . 否则,请调用
dispose()
以删除所有本机屏幕资源 。
Does it help you ? 它对你有帮助吗?
import java.awt.BorderLayout;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
public class TwoJFrames {
public static void main(String[] args) {
int nb = 4;
if (args != null && args.length > 0) {
nb = Integer.parseInt(args[0]);
}
final int frameCount = nb;
SwingUtilities.invokeLater(new Runnable() {
public void run() {
for (int i = 0; i < frameCount; i++) {
JFrame frame = new JFrame("Frame number " + i);
frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
JPanel p = new JPanel(new BorderLayout());
p.add(new JLabel("Click on the corner to close..."), BorderLayout.CENTER);
frame.setContentPane(p);
frame.setSize(200, 200);
frame.setLocation(100 + 20 * i, 100 + 20 * i);
frame.setVisible(true);
}
}
});
}
}
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