GUI编程——标签

本文主要是介绍GUI编程——标签，对大家解决编程问题具有一定的参考价值，需要的程序猿们随着小编来一起学习吧！

标签

label

  new  JLabel("xxx");

图标 ICON

 1 package com.kuang.lesson04;
 2 
 3 import javax.swing.*;
 4 import java.awt.*;
 5 
 6 //图标，需要实现类，Frame继承
 7 public class IconDemo extends JFrame implements Icon {
 8 
 9     private int width;
10     private int height;
11 
12     public  IconDemo(){}   //无参构造
13     public IconDemo(int width,int height){
14         this.width=width;
15         this.height=height;
16     }
17 
18 
19     public void init(){
20         IconDemo iconDemo=new IconDemo(15,15);
21         //图标放在标签，也可以放在按钮上！
22         JLabel label=new JLabel("icontest",iconDemo,SwingConstants.CENTER);
23 
24         Container container=getContentPane();
25         container.add(label);
26 
27         this.setVisible(true);
28         this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
29     }
30 
31     public static void main(String[] args) {
32         new IconDemo().init();
33     }
34 
35     @Override
36     public void paintIcon(Component c,Graphics g,int x,int y){
37         g.fillOval(x,y,width,height);
38     }
39     @Override
40     public int getIconWidth(){
41         return this.width;
42     }
43 
44     @Override
45     public int getIconHeight(){
46         return this.height;
47     }
48 
49 }

图片icon

 1 package com.kuang.lesson04;
 2 
 3 import javax.swing.*;
 4 import java.awt.*;
 5 import java.net.URL;
 6 
 7 public class ImageIconDemo extends JFrame {
 8 
 9     public ImageIconDemo(){
10         //获取图片的地址
11         JLabel label=new JLabel("ImageIcon");
12         URL url=ImageIconDemo.class.getResource("328583.jpg");
13 
14         ImageIcon imageIcon=new ImageIcon(url);   //命名不要重名
15         label.setIcon(imageIcon);
16         label.setHorizontalAlignment(SwingConstants.CENTER);
17 
18         Container container=getContentPane();
19         container.add(label);
20 
21         setVisible(true);
22         setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
23         setBounds(100,100,100,100);
24     }
25 
26     public static void main(String[] args) {
27         new ImageIconDemo();
28     }
29 }

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