Java Swing:在现有窗口顶部的定位对话框 [英] Java Swing: positioning dialog on top of existing window

问题描述

有人可以显示简单的Java Swing代码/Web资源，当单击JFrame的按钮时，该弹出窗口会将弹出对话框居中放置在现有JFrame窗口的顶部吗?

Can someone show simple Java Swing code/web resource that will position the popup dialog center-aligned on top of an existing JFrame window when the JFrame's button clicked?

推荐答案

哦.很简单:

假设您有一个包含JDialog的JFrame，并且希望该JDialog(打开时)位于JFrame的顶部.

Say you have a JFrame that contains a JDialog, and you want the JDialog (when opened) to be right on top of JFrame.

因此，在JDialog构造函数中，您应该具有以下内容:

So in JDialog constructor, you should have something like:

public class MyDialog extends JDialog 
public MyDialog(JFrame parent) 
{
    super.setLocationRelativeTo(parent); // this will do the job
}

换句话说，将JFrame指针传递给对话框，然后调用setLocationRelativeTo(...);方法.

In other words, pass JFrame pointer to your dialog, and call setLocationRelativeTo(...); method.

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