JAVA计算器代码

import java.awt.*; import java.awt.event.*; public class Cal { public static void main(String[] args) { CalFrame f = new CalFrame(); } } class CalFrame extends Frame { double d1, d2; int op = -1; TextField tf; CalPanelL p1; CalPanelR p2; // Constructor CalFrame() { super("Small Calculator"); setLayout(new FlowLayout(FlowLayout.CENTER,8,10)); setBackground(new Color(100,150,150)); setForeground(Color.white); setResizable(false); setSize(300,200); tf = new TextField(22); tf.setEditable(false); tf.setBackground(new Color(108,118,103)); tf.setForeground(Color.white); tf.setFont(new Font("Arial",Font.BOLD,16)); add(tf); p1 = new CalPanelL(); p2 = new CalPanelR(); add(p1); add(p2); setVisible(true); addWindowListener(new Wclose()); } // inner class:CalButton class CalButton extends Button { CalButton(String s){ super(s); setBackground(Color.gray); } } // inner class: CalPanelL class CalPanelL extends Panel { CalButton b0, b1, b2, b3, b4, b5, b6, b7, b8, b9, bPN, bPoint; CalPanelL() { setLayout(new GridLayout(4,3)); setFont(new Font("TimesRoman",Font.BOLD,16)); b0 = new CalButton("0"); b1 = new CalButton("1"); b2 = new CalButton("2"); b3 = new CalButton("3"); b4 = new CalButton("4"); b5 = new CalButton("5"); b6 = new CalButton("6"); b7 = new CalButton("7"); b8 = new CalButton("8"); b9 = new CalButton("9"); bPN = new CalButton("+/-"); bPoint = new CalButton("."); // 加入按钮 add(b7); b7.addActionListener(new PressB7()); add(b8); b8.addActionListener(new PressB8()); add(b9); b9.addActionListener(new PressB9()); add(b4); b4.addActionListener(new PressB4()); add(b5); b5.addActionListener(new PressB5()); add(b6); b6.addActionListener(new PressB6()); add(b1); b1.addActionListener(new PressB1()); add(b2); b2.addActionListener(new PressB2()); add(b3); b3.addActionListener(new PressB3())...