public class Start {
     public static void main(String[] args) {
           MyFrame frame1=new MyFrame();
           frame1.setLocation(200,100);
           frame1.setSize(150, 150);
           MyFrame frame2=new MyFrame();
           frame2.setLocation(350,200);
           MyFrame frame3=new RectFrame();//追加
           frame3.setLocation(50,300);//追加
     }
}
