ps：编译器是notepad++

import java.awt.Frame;

import java.awt.evet.WindowAdapter;

import java.awt.evet.WindowEvent;

public class GameFrame extends Frame{

public void launchFrame(){

setSize(600,600);

setLocation(100,100);

setVisible(true);

addWindowListener(new WindowAdapter(){

@Override

public void windowClosing(WindowEvent e){

System.exit(0);

}

});

}

public void paint(Grapics g){

g.drawLine(100,100,200,200);

g.drawRect(100,100,200,200);

g.drawOval(100,100,200,200);

}

public static void main(String[] args){

GameFrame gf = new GameFrame();

gf.launchFrame();

}

}