用java编写的具有保存计算过程的计算器

jisuan.java

import javax.swing.JMenuBar;

public class jisuan {

public static void main(String[] args) {

jisq ji = new jisq();

}

}

jisq.java

import java.awt.Color;

import https://www.360docs.net/doc/e21599987.html,ponent;

import java.awt.Font;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.io.BufferedReader;

import java.io.BufferedWriter;

import java.io.File;

import java.io.FileWriter;

import java.io.IOException;

import java.io.StringReader;

import java.text.SimpleDateFormat;

import java.util.*;

import javax.swing.*;

import javax.swing.border.BevelBorder;

import javax.swing.border.SoftBevelBorder;

public class jisq extends JFrame implements ActionListener { JPanel pane = new JPanel();

String s, s1, s2;

double t1, t2, t = 0;

JTextField fiel, show;

JTextArea area;

JButton b0, b1, b2, add, b3, b4, b5, b6, b7, b8, sub, b9, mul, dele, equ,

dev;

JButton sqrt, pow, random, sin, p, log, zf, tui, save, clear, copy,point;

public jisq() {

init();

this.setBounds(123, 143, 500, 330);

this.setTitle("计算器");

this.setVisible(true);

this.setResizable(false);

this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

Menu menu=new Menu();

this.setJMenuBar(menu);

}

void init() {

JLabel dangqian = new JLabel();

pane.setLayout(null);

this.add(pane);

Date now = new Date();

dangqian.setText(now.toString());

SimpleDateFormat ri = new SimpleDateFormat("dd"); // 封装为了获取日期

SimpleDateFormat shi = new SimpleDateFormat("kk"); // 封装为了获取小时

SimpleDateFormat fen = new SimpleDateFormat("mm"); // 封装为了获取分钟

SimpleDateFormat miao = new SimpleDateFormat("ss"); // 封装为了获取秒钟

int riqi = Integer.parseInt(ri.format(now)); // 获取日期

int shizhong = Integer.parseInt(shi.format(now)); // 获取小时

int fenzhong = Integer.parseInt(fen.format(now)); // 获取分钟

int miaozhong = Integer.parseInt(miao.format(now)); // 获取秒钟

dangqian.setBounds(170, 7, 553, 22);

pane.add(dangqian);

area = new JTextArea();

JScrollPane scrollPane = new JScrollPane(area,

JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,

JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);

scrollPane.setBounds(280, 70, 200, 140);

area.setEditable(false);

pane.add(scrollPane);

fiel = new JTextField();

fiel.setBounds(10, 30, 250, 30);

fiel.setEditable(false);

fiel.setFont(new Font("TimesRoman", Font.BOLD, 16));// 显示框中的数字大小和颜色

fiel.setHorizontalAlignment(JTextField.RIGHT);// 文字右对齐

fiel.setBackground(Color.white);// 设置背景颜色

// fiel.setBorder(new SoftBevelBorder(BevelBorder.LOWERED));

pane.add(fiel);

show = new JTextField();

show.setBounds(280, 30, 200, 30);

show.setEditable(false);

show.setFont(new Font("TimesRoman", Font.BOLD, 16));// 显示框中的数字大小和颜色

show.setHorizontalAlignment(JTextField.CENTER);// 文字居中

show.setBackground(Color.gray);// 设置背景颜色

pane.add(show);

b0 = new JButton("0");

b0.setBounds(10, 70, 43, 33);

pane.add(b0);

b0.addActionListener(new ActionListener() {// 匿名类实例做监视器

public void actionPerformed(ActionEvent e) {

if (e.getSource() == b0) {

fiel.setText(fiel.getText() + "0");

show.setText(fiel.getText());

}

}

});

b1 = new JButton("1");

b1.setBounds(59, 70, 43, 33);

pane.add(b1);

b1.addActionListener(this);

b2 = new JButton("2");

b2.setBounds(108, 70, 43, 33);

pane.add(b2);

b2.addActionListener(this);

add = new JButton("+");

add.setForeground(Color.BLUE);

add.setBounds(157, 70, 43, 33);

pane.add(add);

add.addActionListener(this);

b3 = new JButton("3");

b3.setBounds(10, 109, 43, 33);

pane.add(b3);

b3.addActionListener(this);

b4 = new JButton("4");

b4.setBounds(59, 109, 43, 33); pane.add(b4);

b4.addActionListener(this);

b5 = new JButton("5");

b5.setBounds(108, 109, 43, 33); pane.add(b5);

b5.addActionListener(this);

sub = new JButton("-");

sub.setForeground(Color.BLUE); sub.setBounds(157, 109, 43, 33); pane.add(sub);

sub.addActionListener(this);

b6 = new JButton("6");

b6.setBounds(10, 148, 43, 33); pane.add(b6);

b6.addActionListener(this);

b7 = new JButton("7");

b7.setBounds(59, 148, 43, 33); pane.add(b7);

b7.addActionListener(this);

b8 = new JButton("8");

b8.setBounds(108, 148, 43, 33); pane.add(b8);

b8.addActionListener(this);

mul = new JButton("*");

mul.setForeground(Color.BLUE); mul.setBounds(157, 148, 43, 33); pane.add(mul);

mul.addActionListener(this);

b9 = new JButton("9");

b9.setBounds(10, 187, 43, 33); pane.add(b9);

b9.addActionListener(this); dele = new JButton("C"); dele.setForeground(Color.red); dele.setBounds(59, 187, 43, 33); pane.add(dele);

dele.addActionListener(this); equ = new JButton("=");

equ.setBounds(108, 187, 43, 33); pane.add(equ);

equ.addActionListener(this);

dev = new JButton("/");

dev.setForeground(Color.blue); dev.setBounds(157, 187, 43, 33); pane.add(dev);

dev.addActionListener(this);

point = new JButton(".");

point.setBounds(10, 226, 43, 33); pane.add(point);

point.addActionListener(this);

p = new JButton("π");

p.setBounds(59, 226, 43, 33); pane.add(p);

p.addActionListener(this);

zf = new JButton("±");

zf.setBounds(108, 226, 43, 33); pane.add(zf);

zf.addActionListener(this);

tui = new JButton("←");

tui.setBounds(206, 70, 53, 33); pane.add(tui);

tui.addActionListener(this);

sqrt = new JButton("√");

sqrt.setBounds(206, 148, 53, 33); pane.add(sqrt);

sqrt.addActionListener(this);

pow = new JButton("xy");

pow.setBounds(206, 109, 53, 33); pane.add(pow);

pow.addActionListener(this); random = new JButton("R"); random.setBounds(156, 226, 43, 33); pane.add(random);

random.addActionListener(this);

sin = new JButton("sin");

sin.setBounds(206, 187, 53, 33); pane.add(sin);

sin.addActionListener(this);

log = new JButton("log");

log.setBounds(206, 226, 53, 33); pane.add(log);

log.addActionListener(this);

save = new JButton("保存");

save.setForeground(Color.RED);

save.setBounds(280, 220, 60, 42);

pane.add(save);

save.addActionListener(this);

copy = new JButton("复制");

copy.setForeground(Color.BLACK);

copy.setBounds(350, 220, 60, 42);

pane.add(copy);

copy.addActionListener(this);

clear = new JButton("清除");

clear.setForeground(Color.BLUE);

clear.setBounds(420, 220, 60, 42);

pane.add(clear);

clear.addActionListener(this);

save.setToolTipText("保存计算过程到文件");

copy.setToolTipText("复制选中的计算过程");

clear.setToolTipText("清除计算过程");

}

public void actionPerformed(ActionEvent e) { String str = e.getActionCommand();

if (str.equals("1")) {

fiel.setText(fiel.getText() + "1");

show.setText(fiel.getText());

} else if (str.equals("2")) {

fiel.setText(fiel.getText() + "2");

show.setText(fiel.getText());

} else if (str.equals("3")) {

fiel.setText(fiel.getText() + "3");

show.setText(fiel.getText());

} else if (str.equals("4")) {

fiel.setText(fiel.getText() + "4");

show.setText(fiel.getText());

} else if (str.equals("5")) {

fiel.setText(fiel.getText() + "5");

show.setText(fiel.getText());

} else if (str.equals("6")) {

fiel.setText(fiel.getText() + "6");

show.setText(fiel.getText());

} else if (str.equals("7")) {

fiel.setText(fiel.getText() + "7");

show.setText(fiel.getText());

} else if (str.equals("8")) {

fiel.setText( fiel.getText() +"8");

show.setText(fiel.getText());

} else if (str.equals("9")) {

fiel.setText(fiel.getText() + "9");

show.setText(fiel.getText());

}else if (str.equals("清除")) {

area.setText(null);

}else if (str.equals(".")) {

fiel.setText(fiel.getText() + ".");

show.setText(fiel.getText());

} else if (str.equals("C")) {

fiel.setText("");

show.setText("");

} if (str.equals("复制"))

area.copy();

if (str.equals("清除"))

area.setText(null);

if (str.equals("保存")) {

JFileChooser chooser = new JFileChooser();

int state = chooser.showSaveDialog(null);

File file = chooser.getSelectedFile();

if (file != null && state == JFileChooser.APPROVE_OPTION) { try {

String content = area.getText();

StringReader read = new StringReader(content);

BufferedReader in = new BufferedReader(read);

FileWriter outOne = new FileWriter(file);

BufferedWriter out = new BufferedWriter(outOne);

String str1 = null;

while ((str1 = in.readLine()) != null) {

out.write(str1);

out.newLine();

}

in.close();

out.close();

} catch (IOException exc) {}

}

}

else if (str.equals("←")) {

StringBuffer s = new StringBuffer(fiel.getText());

if (s.length() > 0) {

fiel.setText(s.delete(s.length() - 1, s.length()).toString());

}

} else if (str.equals("π")) {

t = Math.PI;

fiel.setText("" + t);

show.setText(fiel.getText());

area.append(" " + "π ="+fiel.getText()+ "\n"); } else if (str.equals("+")) {

s = fiel.getText();

s1 ="+";

fiel.setText("");

show.setText(s1);

} else if (str.equals("/")) {

s = fiel.getText();

s1 = "/";

fiel.setText("");

show.setText(s1);

} else if (str.equals("-")) {

s = fiel.getText();

s1 = "-";

fiel.setText("");

show.setText(s1);

} else if (str.equals("*")) {

s = fiel.getText();

s1 = "*";

fiel.setText("");

show.setText(s1);

} else if (str.equals("√")) {

s = fiel.getText();

t1 = Double.parseDouble(s);

t = Math.sqrt(t1);

fiel.setText(t + "");

String process = "sqrt(" + s + ") = " + t;

show.setText(process);

area.append(" " + process + "\n");

} else if (str.equals("±")) {

s = fiel.getText();

t = -Double.parseDouble(s);

if (t != 0)

fiel.setText(t + "");

show.setText(fiel.getText());

}

else if (str.equals("sin")) {

s = fiel.getText();

t1 = Math.PI / 180.0 * Double.parseDouble(s);

t = Math.sin(t1);

fiel.setText(t + "");

String process = "sin(" + s + ") = " + t;

show.setText(process);

area.append(" " + process + "\n");

} else if (str.equals("log")) {

s = fiel.getText();

t1 = Double.parseDouble(s);

t = Math.log10(t1);

fiel.setText(t + "");

String process = "log(" + s + ") = " + t;

show.setText(process);

area.append(" " + process + "\n");

} else if (str.equals("xy")) {

s = fiel.getText();

fiel.setText("");

s1 = "xy";

show.setText(s1);

} else if (str.equals("R")) {

int m = (int) (Math.random() * 100 / 3);

fiel.setText(m + "");

show.setText(fiel.getText());

} else if (str.equals("=")) {

s2 = fiel.getText();

t1 = Double.parseDouble(s);

t2 = Double.parseDouble(s2);

if (s1 == ("+")) {

t = t1 + t2;

} else if (s1 == ("-")) {

t = t1 - t2;

} else if (s1 == ("*")) {

t = t1 * t2;

} else if (s1 == ("/")) {

t = t1 / t2;

} else if (s1 == "xy") {

t = Math.pow(t1, t2);

}

fiel.setText("" + t);

String process=s+ " " + s1 + " " + s2+ " = " + t;

show.setText( process );

area.append(" "+ process + "\n");

}

}

menu.java

import https://www.360docs.net/doc/e21599987.html,ponent;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.text.SimpleDateFormat;

import java.util.Date;

import javax.swing.*;

import https://www.360docs.net/doc/e21599987.html,ment;

class Menu extends JMenuBar implements ActionListener {

JMenuBar menubar;

JMenu menu1, menu2, menu3, submenu;

JMenuItem item1, item2, item3, item4, item5;

public Menu() {

menubar = new JMenuBar();

menu1 = new JMenu("查看(V)");

menu2 = new JMenu("编辑(E)");

menu3 = new JMenu("帮助(H)");

submenu = new JMenu("工作表");

item1 = new JMenuItem("标准型", new ImageIcon("go.gif"));

item2 = new JMenuItem("科学型", new ImageIcon("jian.gif"));

item3 = new JMenuItem("复制", new ImageIcon("on.gif"));

item5 = new JMenuItem("粘贴", new ImageIcon("ic.gif"));

item4 = new JMenuItem("关于计算器", new ImageIcon("ic.gif"));

menu1.add(item1);

menu1.add(item2);

menu1.add(submenu);

submenu.add(new JMenuItem("单位换算", new ImageIcon("co.gif")));

submenu.add(new JMenuItem("日期计算", new ImageIcon("n.gif")));

submenu.add("统计信息");

menu2.add(item3);

menu2.add(item5);

menu3.add(item4);

menubar.add(menu1);

menubar.add(menu2);

menubar.add(menu3);

this.add(menubar);

}

@Override

public void actionPerformed(ActionEvent arg0) { String s = arg0.getActionCommand();

}

}