Java：Get Root Component

Java：Get Root Component

怎样取得父窗口与最上层的JFrame:

 

java.lang.Object

   |__java.awt.Component

            |__java.awt.Container

                     |__java.awt.Window                                |__javax.swing.JComponent

                              |__java.awt.Frame                                   |__javax.swing.AbstractButton

                                       |__javax.swing.JFrame                               |__javax.swing.JButton

import java.beans.Beans;

1. 最简单的方法

public static Component SwingUtilities.getRoot(Component);

get the root component for the current component tree.(JWindow, JFrame, JApplet...)

 

2. 利用getParent()

Component c = (Component)e.getResource();  // 事件处理中 Object java.util.EventObject.getSource()

while (!Beans.isInstanceOf(c, JFrame.class)) {

        c = c.getParent();

}

if (Beans.isInstanceOf(c, JFrame.class)) {

        c = (JFrame)c;

}