Java中通过那个方法可以设置Jframe的显示图标。要不然设计的窗口都是JDK默认图标。

import java.awt.EventQueue;
import java.awt.Image;
import java.io.File;

import javax.imageio.ImageIO;
import javax.swing.JFrame;

public class IconFrame extends JFrame {

public IconFrame init(){
this.setDefaultCloseOperation(EXIT_ON_CLOSE);
this.setSize(300,200);
try {
Image image = ImageIO.read(new File("INPUT YOUR IMAGE FILE NAME HERE!"));
this.setIconImage(image);
} catch (Exception e) {
e.printStackTrace();
}
return this;
}

public static void main(String[] args){
EventQueue.invokeLater(new Runnable(){
public void run(){
new IconFrame().init().setVisible(true);
}
});
}
}

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