Java 关闭一个 JFrame 而不关闭另一个？
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原文地址: http://stackoverflow.com/questions/1944446/
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Close one JFrame without closing another?
提问by Keating
I want to display two (or more) JFramesat the same time.
When I close one of them (use the default close button), the other frames should still be visible.
我想同时显示两个（或更多）JFrame。
当我关闭其中一个（使用默认关闭按钮）时，其他帧应该仍然可见。
How can I do that?
我怎样才能做到这一点？
采纳答案by Peter Lang
If you do notwant your application to terminate when a JFrameis closed, use
如果您不希望应用程序在 aJFrame关闭时终止，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; 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.DISPOSE_ON_CLOSE(defined in WindowConstants): Automatically hide and dispose the frame after invoking any registered WindowListener objects.EXIT_ON_CLOSE(defined in JFrame): Exit the application using the System exit method. Use this only in applications.
DO_NOTHING_ON_CLOSE（在 WindowConstants 中定义）：不要做任何事情；要求程序处理已注册 WindowListener 对象的 windowClosing 方法中的操作。HIDE_ON_CLOSE（在 WindowConstants 中定义）：在调用任何注册的 WindowListener 对象后自动隐藏框架。DISPOSE_ON_CLOSE（在 WindowConstants 中定义）：在调用任何已注册的 WindowListener 对象后自动隐藏和处置框架。EXIT_ON_CLOSE（在 JFrame 中定义）：使用 System exit 方法退出应用程序。仅在应用程序中使用它。
This was my answer before the question was clarified, might still be useful:
这是我在问题澄清之前的回答，可能仍然有用：
You can use setVisible(false)on your JFrameif you want to display the same frame again.
Otherwise call dispose()to remove all of the native screen resources.
如果您想再次显示相同的帧，您可以setVisible(false)在您的上使用JFrame。
否则调用dispose()以删除所有本机屏幕资源。
回答by Laurent K
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);
}
}
});
}
}
