计算器JAVA.doc

import java.awt.*;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.util.*;import javax.swing.*;import java.awt.event.*;public class Jsq extends JFrame implements ActionListener JTextField text = new JTextField(10); /创建单行文本框String s = ; boolean i=true;public Jsq() JLabel w1=new JLabel(计算器,JLabel.CENTER); /创建标签Container con=getContentPane();/获取窗口内容面板con.setLayout(new BorderLayout();/设置边界布局管理器JPanel p1 = new JPanel();/创建面板JPanel p2 = new JPanel();JButton b1 = new JButton(1);/创建按钮JButton b2 = new JButton(2);JButton b3 = new JButton(3);JButton b4 = new JButton(4);JButton b5 = new JButton(5);JButton b6 = new JButton(6);JButton b7 = new JButton(7);JButton b8 = new JButton(8);JButton b9 = new JButton(9);JButton b10 = new JButton(0);JButton b11 = new JButton(+);JButton b12 = new JButton(-);JButton b13 = new JButton(*);JButton b14 = new JButton(/);JButton b15 = new JButton(=); JButton b16 = new JButton(.); JButton b17 = new JButton(清空); JButton b18 = new JButton(); JButton b19 = new JButton(); p1.setLayout(new BorderLayout();/设置P1p1.add(w1, BorderLayout.NORTH);p1.add(text, BorderLayout.CENTER);p1.add(b17,BorderLayout.SOUTH); p1.add(b18,BorderLayout.WEST); p1.add(b19,BorderLayout.EAST);p2.setLayout(new GridLayout(4,4);/设置P2p2.add(b9);p2.add(b8);p2.add(b7);p2.add(b14);p2.add(b6);p2.add(b5);p2.add(b4);p2.add(b13);p2.add(b3);p2.add(b2);p2.add(b1);p2.add(b12); p2.add(b10); p2.add(b15); p2.add(b16); p2.add(b11); p2.setBackground(Color.black);con.add(p1, BorderLayout.NORTH);/将P1，P2等组件添加入内容面板con.add(p2, BorderLayout.CENTER);setSize(400,600);/设置窗口setVisible(true);setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);/关闭窗口时终止程序运行b1.addActionListener(this);/注册监听器b2.addActionListener(this);b3.addActionListener(this);b4.addActionListener(this);b5.addActionListener(this);b6.addActionListener(this);b7.addActionListener(this);b8.addActionListener(this);b9.addActionListener(this);b10.addActionListener(this);b11.addActionListener(this);b12.addActionListener(this);b13.addActionListener(this);b14.addActionListener(this);b15.addActionListener(this); b16.addActionListener(this); b18.addActionListener(this); b19.addActionListener(this); b17.addActionListener(new ShanchuHandler();/注册并创建删除监听器 text.setText(0);public void actionPerformed(ActionEvent e) if(e.getActionCommand()= 9) if(i=true) text.setText(9); i=false; else text.setText(text.getText()+9); if(e.getActionCommand()= 8) if(i=true) text.setText(8); i=false; else text.setText(text.getText()+8); if(e.getActionCommand()= 7) if(i=true) text.setText(7); i=false; else text.setText(text.getText()+7); if(e.getActionCommand()= 6) if(i=true) text.setText(6); i=false; else text.setText(text.getText()+6); if(e.getActionCommand()= 5) if(i=true) text.setText(5); i=false; else text.setText(text.getText()+5); if(e.getActionCommand()= 4) if(i=true) text.setText(4); i=false; else text.setText(text.getText()+4); if(e.getActionCommand()= 3) if(i=true) text.setText(3); i=false; else text.setText(text.getText()+3); if(e.getActionCommand()= 2) if(i=true) text.setText(2); i=false; else text.setText(text.getText()+2); if(e.getActionCommand()= 1) if(i=true) text.setText(1); i=false; else text.setText(text.getText()+1); if(e.getActionCommand()= 0) if(i=true) text.setText(0); i=false; else text.setText(text.getText()+0); if(e.getActionCommand()= () if(i=true) text.setText(); i=false; else text.setText(text.getText()+(); if(e.getActionCommand()= ) if(i=false) text.setText(text.getText()+); if(e.getActionCommand()= .) if(i=false) text.setText(text.getText()+.); if(e.getActionCommand()= +) text.setText(text.getText()+); i=false; if(e.getActionCommand()= -) text.setText(text.getText()+-); i=false; if(e.getActionCommand()= *) text.setText(text.getText()+*); i=false; if(e.getActionCommand()= /) text.setText(text.getText()+/); i=false; if(e.getActionCommand()= =) text.setText(String.valueOf(Calculator(text.getText(); i=true; public double Calculator(String f)/科学计算 int i=0,j=0; char c; StringBuffer s=new StringBuffer(); s.append(f); s.append(=); String formula=s.toString(); char anArray; anArray=new char50; Stack mystack=new Stack(); while(formula.charAt(i)!=) c=formula.charAt(i); switch(c) case (: mystack.push(new Character(c); i+; break; case ): while(mystack.peek().charValue()!=() anArrayj+=mystack.pop().charValue(); mystack.pop(); i+; break; case +: case -: while(!mystack.empty()&mystack.peek().charValue()!=() anArrayj+=mystack.pop().charValue(); mystack.push(new Character(c); i+; break; case *: case /: while(!mystack.empty()&(mystack.peek().charValue()=*|mystack.peek().charValue()=/) anArrayj+=mystack.pop().charValue(); mystack.push(new Character(c); i+; break; case : i+; break; default: while(c=0&c=9)|c=.) anArrayj+=c; i+; c=formula.charAt(i); anArrayj+=#; break; while(!(mystack.empty() anArrayj+=mystack.pop().charValue(); i=0; int count; double a,b,d; Stack mystack1 =new Stack(); while(i=0&c=0&c=9) count+; d=d+(c-0)/Math.pow(10,count); i+; c=anArrayi; if(c=#) mystack1.push(new Double(d); i+; break; return(mystack1.peek().doubleValue();private class Shan