ch4_3.java

里面所含源码是本人平时做程序的一些实例

import javax.swing.*;
import java.awt.*;
public class ch4_3 extends JFrame{
	public ch4_3(){
		super("继承JFrame类得到Frame对象");
		//set Title("继承JFrame类得到Frame对象");
		setSize(250,150);
		setVisible(true);
		Toolkit tk=Toolkit.getDefaultToolkit();
		Image logo=tk.getImage("image1/29.gif");
		setIconImage(logo);
		setDefaultCloseOperation(EXIT_ON_CLOSE);
	}	
	public static void main(String args[]){
		new ch4_3();
	}
}