JAVA:URL之图像图标

 1 //设计图像图标
 2 import javax.swing.*;
 3 import java.awt.*;
 4 public class TestImageIcon extends JFrame
 5 {
 6        private ImageIcon icon1 = new ImageIcon("ToolImages/20.gif");//"ToolImages/20.gif"为该project文件夹下的路劲
 7        private ImageIcon icon2 = new ImageIcon("ToolImages/21.gif");
 8        private ImageIcon icon3 = new ImageIcon("ToolImages/22.gif");
 9        public TestImageIcon()
10        {
11            setLayout(new GridLayout(1,3,5,5));
12            add(new JButton(icon1));
13            add(new JLabel(icon2));
14            add(new JButton(icon3));
15         }
16         public static void main(String[] agrs)
17         {
18             JFrame frame = new TestImageIcon();
19             frame.setTitle("TestImageIcon");
20             frame.setLocationRelativeTo(null);
21             frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
22             frame.setSize(500,300);
23             frame.setVisible(true);
24         }
25 }