JAVA中Icon接口的应用（以JLabel为例）

最新推荐文章于 2021-12-21 01:12:23 发布

转载最新推荐文章于 2021-12-21 01:12:23 发布 · 54 阅读

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原文链接：http://www.cnblogs.com/javaTest/archive/2012/01/02/2589199.html

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本文介绍了一个使用Java Swing中的Icon接口来为JLabel组件绘制圆形图标的示例。通过实现Icon接口并重写其方法，可以自定义图标的外观。

This example shows the drawing of an icon using the Icon interface for the JLable component.

package com.han;
import java.awt.*;
import javax.swing.*;

/**
 * This example shows the drawing of an icon using the Icon interface
 *  for the JLable component.
 * @author han
 *
 */
public class DrawIcon implements Icon{
	private int width;
	private int height;
	@Override
	public int getIconHeight(){
		return this.height;
	}
	@Override
	public int getIconWidth(){
		return this.width;
	}
	@Override
	public void paintIcon(Component c, Graphics g, int x, int y){
		g.setColor(Color.red);
		g.fillOval(x, y, width, height);
	}
	/*the construct function*/
	public DrawIcon(int width, int height){
		this.width=width;
		this.height=height;
	}
    public static void main(String[] args){
    	DrawIcon icon=new DrawIcon(15,15);
    	JLabel jl=new JLabel("测试",icon,SwingConstants.CENTER);
    	JFrame jf=new JFrame();
    	Container c=jf.getContentPane();
    	c.add(jl);
    	jf.setVisible(true);
    	jf.setSize(300,300);
    	jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }
}

转载于:https://www.cnblogs.com/javaTest/archive/2012/01/02/2589199.html