Java 在 JFrame 上运行函数关闭
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Run function on JFrame close
提问by Mattias
void terminate() {}
protected JFrame frame = new JFrame();
How can I get frameto run the terminate function when I press the close button?
frame当我按下关闭按钮时，如何运行终止功能？
Edit: I tried to run this, but for some reason it doesn't print test (however, the program closes). Does anyone have an idea what could be the problem?
编辑：我试图运行它，但由于某种原因它不打印测试（但是，程序关闭）。有谁知道可能是什么问题？
frame.addWindowListener(new WindowAdapter() {
public void WindowClosing(WindowEvent e) {
System.out.println("test");
frame.dispose();
}
});
采纳答案by Maroun
You can use addWindowListener:
您可以使用addWindowListener：
frame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
// call terminate
}
});
See void windowClosing(WindowEvent e)and Class WindowAdaptertoo.
回答by Martin Seeler
If you want to terminate your program after the JFrame is closed, you have to set the default close operation on your JFrame.
如果要在 JFrame 关闭后终止程序，则必须在 JFrame 上设置默认关闭操作。
In your constructor of your JFrame write:
在你的 JFrame 的构造函数中写：
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
If you just want to call a method when the window is closed and not terminate the whole program, than go with the answer of Maroun.
如果您只想在窗口关闭时调用一个方法而不是终止整个程序，那么请使用 Maroun 的答案。
回答by Gilbert Le Blanc
Not only do you have to add the window listener, you have to set the default close operation to do nothing on close. This allows your code to execute.
您不仅需要添加窗口侦听器，还必须将默认关闭操作设置为在关闭时不执行任何操作。这允许您的代码执行。
frame.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);
frame.addWindowListener(new WindowAdapter() {
@Override
public void windowClosing(WindowEvent event) {
exitProcedure();
}
});
Finally, you have to call System exit to actually stop your program from running.
最后，您必须调用 System exit 以实际停止您的程序运行。
public void exitProcedure() {
frame.dispose();
System.exit(0);
}
回答by Muhammad
Frame.dispose() method does not terminate the program. To terminate the programe you need to call System.exit(0) method
Frame.dispose() 方法不会终止程序。要终止程序，您需要调用 System.exit(0) 方法
