一曲腸斷，天涯何處覓知音！

為java的窗口實例設置小圖標，最好是PNG格式的

import java.awt.Image;
import javax.swing.ImageIcon;
import javax.swing.JFrame;

public class Frame extends JFrame {
 
          public static void main(String[] args) {
                    new Frame().launchFrame();
          }
 
          public void launchFrame() {
                      setSize(300,300);
                      setTitle("窗口示例");

                      //獲取圖片并設為窗口圖標，注意，這里的images文件夾必須和Frame.java文件在同一個包中

                       java.net.URL imgURL = Frame.class.getResource("/images/yourImage.png");
                       ImageIcon imgIcon = new ImageIcon(imgURL);
                       Image img = imgIcon.getImage();
                       this.setIconImage(img);

                      //將窗口顯示在屏幕正中
                      this.setLocationRelativeTo(null);
                      setVisible(true);
           }

}