jfjp.java

我的一个ＪＡＶＡ作业

import java.awt.*;
import javax.swing.*;
import javax.swing.event.*;
class Jframe1 extends JFrame{
public Jframe1(){
super("HelloWorld");
Container content=getContentPane();
Jpanel1 j=new Jpanel1();
content.add(j);}}
class Jpanel1 extends JPanel{
public void paintComponent(Graphics g){
g.drawString("Hello World",100,100);
}
}
public class JfJp {
public static void main(String args[]){
   Jframe1 f=new Jframe1();
   f.setBounds(100,100,300,300);
   f.setVisible(true);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}}