JSwing

package onlinejudge;
//import java.util.Scanner;
import javax.swing. *;
import java.awt. *;
	public class Main{
	public static void main(String []args) {
	   JFrame window1 = new JFrame("第一个窗口");
	   JFrame window2 = new JFrame("第二个窗口");
	   Container con = window1.getContentPane();
	   //Container com = window2.getContentPane();
	   con.setBackground(Color.yellow);
	   //com.setBackground(Color.red);
	   window1.setBounds(60,100,188,100);
	   window2.setBounds(260,100,188,100);
	   window1.setVisible(true);
	   window1.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE );
	   window2.setVisible(true);
	   window2.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	}
}

package onlinejudge;
import javax.swing. *;
import java.awt.event.InputEvent;
import java.awt.event.KeyEvent;
import static javax.swing.JFrame. *;
 class WindowMenu extends JFrame{
	JMenuBar menubar;
	JMenu menu, subMenu;
	JMenuItem item1,item2;
	public WindowMenu() {}
	public WindowMenu(String s, int x, int y ,int w, int h) {
		init(s);
		setLocation(x,y);
		setSize(w,h);
		setVisible(true);
		setDefaultCloseOperation(DISPOSE_ON_CLOSE);
	}
	void init(String s) {
		setTitle(s);
		menubar = new JMenuBar();
		menu = new JMenu("菜单");
		subMenu = new JMenu("子菜单");
		item1 = new JMenuItem("菜单项1",new ImageIcon("a.gif"));
		item2 = new JMenuItem("菜单项2",new ImageIcon("b.gif"));
		item1.setAccelerator(KeyStroke.getKeyStroke('A'));
		item2.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_S, InputEvent.CTRL_MASK));
		menu.add(item1);
		menu.addSeparator();
		menu.add(item2);
		menu.add(subMenu);
		subMenu.add(new JMenuItem("子菜单里的菜单项",new ImageIcon("c.gif")));
		menubar.add(menu);
		setJMenuBar(menubar);
     }
}
public class Main1 {
      public static void main(String []args) {
    	  WindowMenu win =  new WindowMenu("带菜单的窗口",20,30,200,190);
      }
}