lesson16-IconDemo

 

 

package com.zym.lesson16;

import javax.swing.*;
import java.awt.*;

public class JIconDemo extends JFrame implements Icon {

    public static void main(String[] args) {
              new JIconDemo().init();
    }

    private int width;
    private int height;
    //无参构造
    public JIconDemo(){

    }
    //有参构造
    public JIconDemo(int width,int height){
     this.height=height;
     this.width=width;
    }
    public void init(){
        JIconDemo jIconDemo=new JIconDemo(15,15);
        JLabel jLabel=new JLabel("icontest",jIconDemo,SwingConstants.CENTER);
        Container container=getContentPane();
        container.add(jLabel);
        this.setTitle("lesson16-IconDemo");
        this.setVisible(true);
        this.setSize(400,300);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        };



    @Override
    public void paintIcon(Component c, Graphics g, int x, int y) {
       g.fillOval(x,y,width,height);
    }

    @Override
    public int getIconWidth() {
        return this.width;
    }

    @Override
    public int getIconHeight() {
        return this.height;
    }
}