parent
c70a79b85f
commit
0821635da0
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import javax.swing.*;
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import java.awt.*;
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public class CalculatorWindow extends JFrame {
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Computer computer;
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JButton numberButtons[];
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JButton operatorButton[];
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//加减乘除按钮
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JButton dot,fu,back,equation,clear,sqrt,reciprocal;
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JTextField resultShow;
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//显示计算结果
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JTextField showTempResult;
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//临时结果
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JLabel showOperator;
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//运算符
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JTextField showDataItem;
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//当前参与运算的数据项
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JTextArea computerProcess;
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//计算步骤
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JButton saveBtn,copyBtn,clearTextBtn;
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public CalculatorWindow() throws HeadlessException {
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computer=new Computer();
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initView();//设置界面
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initActionListener();//注册监视器
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}
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public void initView(){
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this.setTitle("计算器");
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JPanel left,right;
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resultShow=new JTextField(10);
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resultShow.setHorizontalAlignment(JTextField.LEFT);
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resultShow.setForeground(Color.blue);
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resultShow.setFont(new Font("TimesRoman",Font.BOLD,14));
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resultShow.setEditable(false);
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resultShow.setBackground(Color.lightGray);
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showTempResult=new JTextField();
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showTempResult.setHorizontalAlignment(JTextField.RIGHT);
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showTempResult.setFont(new Font("Arial",Font.BOLD,14));
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showTempResult.setEditable(false);
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showOperator=new JLabel();
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showOperator.setHorizontalAlignment(JTextField.CENTER);
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showOperator.setFont(new Font("Arial",Font.BOLD,18));
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showDataItem=new JTextField();
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showDataItem.setHorizontalAlignment(JTextField.LEFT);
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showDataItem.setBackground(Color.white);
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showDataItem.setFont(new Font("Arial",Font.BOLD,14));
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showDataItem.setEditable(false);
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computerProcess=new JTextArea();
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computerProcess.setEditable(false);
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computerProcess.setFont(new Font("宋体",Font.PLAIN,14));
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numberButtons=new JButton[10];
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for (int i = 0; i <=9; i++) {
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numberButtons[i]=new JButton(" "+i);
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numberButtons[i].setFont(new Font("Arial",Font.BOLD,20));
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}
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operatorButton=new JButton[4];
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String s[]={"+","-","*","/"};
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for (int i = 0; i < 4; i++) {
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operatorButton[i]=new JButton(s[i]);
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operatorButton[i].setFont(new Font("Arial",Font.BOLD,20));
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}
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dot=new JButton(".");
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fu=new JButton("+/-");
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equation=new JButton("=");
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back=new JButton("退格");
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clear=new JButton("C");
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sqrt=new JButton("sqrt");
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reciprocal=new JButton("1/x");
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saveBtn=new JButton("保存");
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copyBtn=new JButton("复制");
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clearTextBtn=new JButton("清除");
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left=new JPanel();
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right=new JPanel();
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//左边布局
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left.setLayout(new BorderLayout());
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//BorderLayout 容器分为五个部分(东南西北中)，每部分只能包含一个组件
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JPanel centerInLeft=new JPanel();
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Box box=Box.createHorizontalBox();
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//创建水平排列组件的Box
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box.add(showTempResult);
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box.add(showOperator);
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box.add(showDataItem);
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left.add(box,BorderLayout.NORTH);
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left.add(centerInLeft,BorderLayout.CENTER);
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centerInLeft.setLayout(new GridLayout(5,5));
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//GridLayout 网格布局5行5列
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centerInLeft.add(numberButtons[1]);
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centerInLeft.add(numberButtons[2]);
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centerInLeft.add(numberButtons[3]);
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centerInLeft.add(operatorButton[0]);
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centerInLeft.add(back);
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centerInLeft.add(numberButtons[4]);
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centerInLeft.add(numberButtons[5]);
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centerInLeft.add(numberButtons[6]);
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centerInLeft.add(operatorButton[1]);
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centerInLeft.add(clear);
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centerInLeft.add(numberButtons[7]);
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centerInLeft.add(numberButtons[8]);
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centerInLeft.add(numberButtons[9]);
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centerInLeft.add(operatorButton[2]);
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centerInLeft.add(reciprocal);
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centerInLeft.add(numberButtons[0]);
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centerInLeft.add(fu);
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centerInLeft.add(dot);
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centerInLeft.add(operatorButton[3]);
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centerInLeft.add(sqrt);
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for (int i = 0; i < 4; i++) {
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centerInLeft.add(new JLabel());
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}
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centerInLeft.add(equation);
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//右边布局
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right.setLayout(new BorderLayout());
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right.add(resultShow,BorderLayout.NORTH);
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right.add(new JScrollPane(computerProcess),BorderLayout.CENTER);
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JPanel southInRight=new JPanel();
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southInRight.add(saveBtn);
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southInRight.add(copyBtn);
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southInRight.add(clearTextBtn);
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right.add(southInRight,BorderLayout.SOUTH);
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JSplitPane split=new JSplitPane(JSplitPane.HORIZONTAL_SPLIT,left,right);
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//split 左右布局的分割面板
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add(split,BorderLayout.CENTER);
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setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//设置 点击关闭退出程序
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setVisible(true);
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setBounds(200,200,788,258);//设置位置大小
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validate();
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}
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public void initActionListener(){
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HandleDight hd=new HandleDight(this);
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for (int i = 0; i <= 9; i++) {
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numberButtons[i].addActionListener(hd);
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}
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dot.addActionListener(hd);
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HandleOperator ho=new HandleOperator(this);
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for (int i = 0; i < 4; i++) {
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operatorButton[i].addActionListener(ho);
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}
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fu.addActionListener(new HandleFu(this));
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sqrt.addActionListener(new HandleSqrt(this));
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reciprocal.addActionListener(new HandleReciprocal(this));
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back.addActionListener(new HandleBack(this));
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equation.addActionListener(new HandleEquation(this));
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clear.addActionListener(new HandleClear(this));
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HandleFile hf=new HandleFile(this);
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saveBtn.addActionListener(hf);
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copyBtn.addActionListener(hf);
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clearTextBtn.addActionListener(hf);
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}
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}
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@ -0,0 +1,129 @@
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import java.util.Stack;
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public class Computer {
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public double result;//结果
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public Stack<Character> dataItem;//参与运算数据项
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public Stack<Double> tempResult;//中间结果
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public Stack<Character> operator;//运算符号
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public Computer(){
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init();
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}
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public void init(){//初始化
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dataItem=new Stack<Character>();
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tempResult=new Stack<Double>();
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dataItem.push('0');
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operator=new Stack<Character>();
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}
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public double getResult() {
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double endItem=0;
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if(dataItem.empty()){
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endItem=tempResult.peek();
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}else{
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endItem=computerDataItem();
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}
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if(operator.empty()){
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result=endItem;
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return result;
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}
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char c=operator.peek();
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if (c == '+') {
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result=tempResult.peek()+endItem;
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}else if (c == '-') {
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result=tempResult.peek()-endItem;
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}else if (c == '*') {
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result=tempResult.peek()*endItem;
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}else if (c == '/') {
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result=tempResult.peek()/endItem;
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}
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return result;
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}
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public void setDataItem(char c) {
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//数据项中不包含小数点时才可以添加小数点
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if(c!='.')
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dataItem.push(c);
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else {
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if(!dataItem.contains('.'))
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dataItem.push(c);
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}
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}
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public double getTempResult() {
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double t=0;
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if(tempResult.empty()){
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t=computerDataItem();
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}else{
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t=tempResult.peek();
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}
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return t;
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}
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public char getOperator() {
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if(operator.empty()){
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return '\0';
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}
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return operator.peek();
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}
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public void setOperator(char p) {
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if(dataItem.empty()){
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operator.clear();//防止重复输入运算符
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operator.push(p);//保留用户最后确定的运算符
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return;
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}
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if(operator.empty()){
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operator.push(p);
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double m=computerDataItem();//计算数据项
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dataItem.removeAllElements();//清空数据项中的数字
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tempResult.push(m);//临时结果压入tempResult
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}else{
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double m1=computerDataItem();
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dataItem.removeAllElements();
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char c= operator.pop();//弹出已有的运算符
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double t=tempResult.pop();//弹出临时结果
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if (c == '+') {
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t=t+m1;
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}else if (c == '-') {
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t=t-m1;
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}else if (c == '*') {
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t=t*m1;
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}else if (c == '/') {
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t=t/m1;
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}
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tempResult.push(t);//把新的结果压入tempResult
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operator.push(p);//把新的运算符压入operator
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}
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}
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public double computerDataItem(){//计算出数据项的double型结果
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if(dataItem.empty()){
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return tempResult.peek();
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}
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StringBuffer sb=new StringBuffer();
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double doubleData=0;
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for (int i = 0; i < dataItem.size(); i++) {
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sb.append(dataItem.get(i));//获取堆栈中的数字但不弹栈
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}
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try {
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doubleData=Double.parseDouble(sb.toString());
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}catch (NumberFormatException e){
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doubleData=0;
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}
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return doubleData;
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}
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public void backspace(){
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if(dataItem.size()>=1){
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dataItem.pop();
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}
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}
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public void initMath(MathComputer mc){
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mc.handle(this);
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}
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}
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