import javax.swing.*
public class GUI extends JFrame{
private JMenuBar mb=new JMenuBar()
private JMenu mm=new JMenu("文件")
private JMenuItem mi1=new JMenuItem("粘贴")
private JMenuItem mi2=new JMenuItem("复制")
private JLabel l=new JLabel()
public GUI(){
this.setLayout(null)
mm.add(mi1)
mm.add(mi2)
mb.add(mm)
this.setJMenuBar(mb)
l.setText("我的第一个图形用户界面")
l.setBounds(10,10,450,30)
this.getContentPane().add(l)
this.setBounds(330,250,500,150)
this.setVisible(true)
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE)
}
public static void main(String[] args){
new GUI()
}
}