java小程序源代码

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

import javax.swing.event.*;

 

 

class   CalculatorPanel extends JPanel implements ActionListener

{  

 

    publicCalculatorPanel()

    {  

        setLayout(newBorderLayout());

               

        display=newJTextField("0");

        display.setEditable(false);

        add(display,"Center");

        ope=newJTextField("     ");

        ope.setEditable(false);

        add(ope,"West");

        //创建菜单栏(暂时无实际意义)

        JMenuBarbar=new JMenuBar();

        add(bar,"North");

        JMenuview=new JMenu("查看(V)");

        JMenuedit=new JMenu("编辑(E)");

        JMenuhelp=new JMenu("帮助(H)");

        bar.add(view);

        bar.add(edit);

        bar.add(help);

           

        JMenuItemnewItem=new JMenuItem("标准型(V)");<