Calculator

package ch14;import java.awt.BorderLayout;import java.awt.event.*;import java.text.SimpleDateFormat;import java.util.Calendar;import java.util.Date;import java.util.Timer;import java.util.TimerTask;import java.sql.*;import javax.swing.*;import java.awt.EventQueue;import javax.swing.BorderFactory;import javax.swing.JFrame;import javax.swing.JMenuItem;import javax.swing.JOptionPane;import javax.swing.JPanel;import javax.swing.JTextField;import javax.swing.border.EmptyBorder; import java.awt.GridLayout;import javax.swing.JButton;import javax.swing.JLabel;import java.awt.Font;import javax.swing.SwingConstants;import java.awt.Color;import java.awt.Frame;import java.awt.Panel;import java.awt.SystemColor;import javax.swing.UIManager;import javax.swing.border.LineBorder; import javax.swing.text.JTextComponent;import ch14.TimeFrame.JLabelTimerTask; import mandAction; import ch14.calculatorJPanel.InsertAction;import java.awt.event.*;public class Calculator extends JFrame {private JPanel contentPane;private JMenuItem open,exit,about,jtime;private boolean start=true;private boolean mid=true;private boolean flag=false;private boolean timeflag=false;private String lastCommand="=";private String time;double result;private double num1,num2;private JLabel lblNewLabel;private JLabel lblNewLabel1;private JLabel lblNewLabel2;private JLabel label;private String DEFAULT_TIME_FORMA T = "yyyy-MM-dd HH:mm:ss";private int ONE_SECOND = 1000;JTextArea jta=new JTextArea(4,10);/*** Launch the application.*/public static void main(String[] args) {try {Calculator frame = new Calculator();ImageIcon imageicon=new ImageIcon("/CH/images/计算器.jpg");frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);frame.setLocationRelativeTo(null);frame.setVisible(true);} catch (Exception e) {e.printStackTrace();}}/*** Create the frame.*/public Calculator() {setBackground(Color.LIGHT_GRAY);ImageIcon imageicon=new ImageIcon("/CH/images/计算器.jpg");setTitle("个人计算器");setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);setBounds(100, 100, 379, 700);contentPane = new JPanel();contentPane.setBackground(Color.LIGHT_GRAY);contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));//setContentPane(contentPane);add(contentPane,BorderLayout.CENTER);contentPane.setLayout(null);jta.setLineWrap(true);jta.setWrapStyleWord(true);JScrollPane pane=new JScrollPane(jta);add(pane,BorderLayout.PAGE_END);JMenuBar jmb=new JMenuBar();setJMenuBar(jmb);JMenu fileMenu=new JMenu("文件");JMenu helpMenu=new JMenu("帮助");JMenu timeMenu=new JMenu("时间");jmb.add(fileMenu);//将菜单添加到菜单栏上jmb.add(helpMenu);jmb.add(timeMenu);fileMenu.add(open=new JMenuItem("打开"));fileMenu.add(exit=new JMenuItem("退出"));helpMenu.add(about=new JMenuItem("关于此简易计算器的使用"));timeMenu.add(jtime=new JMenuItem("系统时间")); InsertAction insert=new InsertAction();CommandAction command=new CommandAction();open.addActionListener(command);exit.addActionListener(command);about.addActionListener(command);jtime.addActionListener(command);JPanel panel = new JPanel();panel.setBounds(10, 180, 343, 378);contentPane.add(panel);panel.setLayout(new GridLayout(5, 4, 2, 2));JButton btnNewButton_15 = new JButton("1/n"); btnNewButton_15.addActionListener(command); btnNewButton_15.setFont(new Font("楷体", Font.BOLD, 13)); panel.add(btnNewButton_15);JButton btnNewButton_16 = new JButton("sqrt"); btnNewButton_16.addActionListener(command); btnNewButton_16.setFont(new Font("楷体", Font.BOLD, 18)); panel.add(btnNewButton_16);JButton btnNewButton_17 = new JButton("n!"); btnNewButton_17.addActionListener(command); btnNewButton_17.setFont(new Font("楷体", Font.BOLD, 13)); panel.add(btnNewButton_17);JButton btnNewButton_18 = new JButton("一键还原"); btnNewButton_18.addActionListener(command); btnNewButton_18.setFont(new Font("楷体", Font.BOLD, 11)); panel.add(btnNewButton_18);JButton btnNewButton_7 = new JButton("7"); btnNewButton_7.addActionListener(insert);btnNewButton_7.setFont(new Font("楷体", Font.BOLD, 18)); panel.add(btnNewButton_7);JButton btnNewButton_8 = new JButton("8"); btnNewButton_8.addActionListener(insert);btnNewButton_8.setFont(new Font("楷体", Font.BOLD, 18)); panel.add(btnNewButton_8);JButton btnNewButton_9 = new JButton("9"); btnNewButton_9.addActionListener(insert);btnNewButton_9.setFont(new Font("楷体", Font.BOLD, 18)); panel.add(btnNewButton_9);JButton btnNewButton_14 = new JButton("/"); btnNewButton_14.addActionListener(command);btnNewButton_14.setFont(new Font("楷体", Font.BOLD, 18)); panel.add(btnNewButton_14);JButton btnNewButton_4 = new JButton("4"); btnNewButton_4.addActionListener(insert);btnNewButton_4.setFont(new Font("楷体", Font.BOLD, 18)); panel.add(btnNewButton_4);JButton btnNewButton_5 = new JButton("5"); btnNewButton_5.addActionListener(insert);btnNewButton_5.setFont(new Font("楷体", Font.BOLD, 18)); panel.add(btnNewButton_5);JButton btnNewButton_6 = new JButton("6"); btnNewButton_6.addActionListener(insert);btnNewButton_6.setFont(new Font("楷体", Font.BOLD, 18)); panel.add(btnNewButton_6);JButton btnNewButton_13 = new JButton("*"); btnNewButton_13.addActionListener(command); btnNewButton_13.setFont(new Font("楷体", Font.BOLD, 18)); panel.add(btnNewButton_13);JButton btnNewButton_1 = new JButton("1"); btnNewButton_1.addActionListener(insert);btnNewButton_1.setFont(new Font("楷体", Font.BOLD, 18)); panel.add(btnNewButton_1);JButton btnNewButton_2 = new JButton("2"); btnNewButton_2.addActionListener(insert);btnNewButton_2.setFont(new Font("楷体", Font.BOLD, 18)); panel.add(btnNewButton_2);JButton btnNewButton_3 = new JButton("3"); btnNewButton_3.addActionListener(insert);btnNewButton_3.setFont(new Font("楷体", Font.BOLD, 18)); panel.add(btnNewButton_3);JButton btnNewButton_12 = new JButton("-"); btnNewButton_12.addActionListener(command); btnNewButton_12.setFont(new Font("楷体", Font.BOLD, 18)); panel.add(btnNewButton_12);JButton btnNewButton_10 = new JButton("."); btnNewButton_10.addActionListener(insert); btnNewButton_10.setFont(new Font("楷体", Font.BOLD, 18)); panel.add(btnNewButton_10);JButton btnNewButton_0 = new JButton("0"); btnNewButton_0.addActionListener(insert);btnNewButton_0.setFont(new Font("楷体", Font.BOLD, 18)); panel.add(btnNewButton_0);JButton btnNewButton_19 = new JButton("=");btnNewButton_19.addActionListener(command);btnNewButton_19.setFont(new Font("楷体", Font.BOLD, 18));panel.add(btnNewButton_19);JButton btnNewButton_11 = new JButton("+");btnNewButton_11.addActionListener(command);btnNewButton_11.setFont(new Font("楷体", Font.BOLD, 18));panel.add(btnNewButton_11);lblNewLabel = new JLabel(" ");lblNewLabel.setForeground(Color.BLACK);lblNewLabel.setBorder(new LineBorder(Color.BLACK));lblNewLabel.setHorizontalAlignment(SwingConstants.RIGHT);lblNewLabel.setFont(new Font("楷体", Font.BOLD, 15));lblNewLabel.setBounds(10, 25, 343, 73);contentPane.add(lblNewLabel);lblNewLabel1=new JLabel(" ");lblNewLabel1.setVisible(false);lblNewLabel1.setForeground(Color.GREEN);lblNewLabel1.setBorder(new LineBorder(Color.GREEN));lblNewLabel1.setHorizontalAlignment(SwingConstants.CENTER);lblNewLabel1.setFont(new Font("楷体", Font.BOLD, 18));lblNewLabel1.setBounds(10, 25, 343, 73);contentPane.add(lblNewLabel1);lblNewLabel2=new JLabel(" ");lblNewLabel2.setVisible(true);lblNewLabel2.setForeground(Color.RED);lblNewLabel2.setBorder(new LineBorder(Color.RED));lblNewLabel2.setHorizontalAlignment(SwingConstants.CENTER);//lblNewLabel2.setFont(new Font("楷体", Font.BOLD, 18));lblNewLabel2.setIcon(imageicon);lblNewLabel2.setBounds(10, 100, 343, 73);contentPane.add(lblNewLabel2);}private void configTimeArea() {Timer tmr = new Timer();tmr.scheduleAtFixedRate(new JLabelTimerTask(),new Date(), ONE_SECOND);}protected class JLabelTimerTask extends TimerTask{SimpleDateFormat dateFormatter = new SimpleDateFormat(DEFAULT_TIME_FORMA T);@Overridepublic void run() {time = dateFormatter.format(Calendar.getInstance().getTime());lblNewLabel1.setText("Now :"+time);}}private void setIconImage(String string) {// TODO Auto-generated method stub}//定义内部类，实现ActionListener接口public class InsertAction implements ActionListener{public void actionPerformed(ActionEvent event){String input=event.getActionCommand();if(start){lblNewLabel.setText("");start=false;}lblNewLabel.setText(lblNewLabel.getText()+input);}}public class CommandAction implements ActionListener{public void actionPerformed(ActionEvent e){String command=e.getActionCommand();if(command.equals("打开")){jta.setText(" 欢迎来到此简易计算器系统!\nWelcome to a system of our calculator! \n请先在“帮助”菜单中点击“关于此简易计算器的运算”，在查看说明书" +"的前提下运行此计算器。