Java Swing界面编程(21)-事件处理：窗体事件

Java Swing界面编程(21)---事件处理：窗体事件

WindowLIstener是专门处理窗体的事件监听窗口，一个窗体的所有变化，如窗口的打开、关闭等都可以使用这个接口进行监听。

实现WIndowListener：

package com.beyole.util;

import java.awt.event.WindowEvent;
import java.awt.event.WindowListener;

public class MyWindowEventHandle implements WindowListener {

	@Override
	public void windowOpened(WindowEvent e) {
		System.out.println("windowOpened--->窗口被打开");
	}

	@Override
	public void windowClosing(WindowEvent e) {
		System.out.println("windowClosing--->窗口关闭");
	}

	@Override
	public void windowClosed(WindowEvent e) {
		System.out.println("windowClosed--->窗口被关闭");
	}

	@Override
	public void windowIconified(WindowEvent e) {
		System.out.println("windowIconified--->窗口最小化");
	}

	@Override
	public void windowDeiconified(WindowEvent e) {
		System.out.println("windowDeiconfied--->窗口从最小化恢复");
	}

	@Override
	public void windowActivated(WindowEvent e) {
		System.out.println("windowActivated--->窗口被选中");
	}

	@Override
	public void windowDeactivated(WindowEvent e) {
		System.out.println("windowDeactivated--->取消窗口被选中");
	}

}

单单只有监听器是不够的，还需要在组件使用时注册监听，这样才能处理，直接使用窗体的addWindowListener(监听对象)方法即可注册事件监听

package com.beyole.util;

import java.awt.Color;

import javax.swing.JFrame;

public class MyWindowEventFrame01 {
	public static void main(String[] args) {
		JFrame frame=new JFrame("Crystal");
		frame.addWindowListener(new MyWindowEventHandle());
		frame.setSize(300, 160);
		frame.setBackground(Color.WHITE);
		frame.setLocation(300, 200);
		frame.setVisible(true);
	}
}

程序截图：

结果截图：