标签

标签

label

new JLabel("xxx");

图标icon

package com.hua.demo4;

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

//图标，需要实现类，Frame继承
public class IconDemo extends JFrame implements Icon {

    private int width;
    private int height;

    public IconDemo() {//无参构造
    }

    public IconDemo(int width, int height){
        this.width = width;
        this.height = height;
    }
    public void init(){
        IconDemo iconDemo = new IconDemo(15,15);
        JLabel label = new JLabel("iconTest", iconDemo, SwingConstants.CENTER);
        Container container = getContentPane();
        container.add(label);
        setBounds(100,100,500,300);
        setVisible(true);
    }
    public static void main(String[] args) {
        new IconDemo().init();
    }
    @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;
    }
}

图片icon

package com.hua.demo4;

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

public class ImageIconDemo extends JFrame {
    public ImageIconDemo(){
        //获取图片的地址
        JLabel label = new JLabel("ImageIcon");
        URL url = ImageIconDemo.class.getResource("BruceLee.jpg");

        ImageIcon imageIcon = new ImageIcon(url);//命名不要冲突了
        label.setIcon(imageIcon);
        label.setHorizontalAlignment(SwingConstants.CENTER);

        Container container = getContentPane();
        container.add(label);

        setVisible(true);
        setBounds(100,100,100,100);
        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }
    public static void main(String[] args) {
        new ImageIconDemo();
    }
}