计应193第一组个人流程——任远航

package 软件工程;

import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.EventQueue;

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import java.awt.GridLayout;
import java.awt.Color;
import java.awt.Font;
import javax.swing.JButton;
import javax.swing.BoxLayout;
import java.awt.GridBagLayout;
import java.awt.GridBagConstraints;
import java.awt.Insets;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.FlowLayout;
import java.awt.CardLayout;
import com.jgoodies.forms.layout.FormLayout;
import com.jgoodies.forms.layout.ColumnSpec;
import com.jgoodies.forms.layout.RowSpec;
import javax.swing.GroupLayout;
import javax.swing.GroupLayout.Alignment;
import net.miginfocom.swing.MigLayout;
import javax.swing.border.LineBorder;
import javax.swing.SwingConstants;

public class Calculator extends JFrame {

    private JPanel contentPane;
    private JTextField numberField;
    private JPanel panel;
    private JPanel panel_1;
    private JButton one;
    private JButton seven;
    private JButton subtraction;
    private JButton two;
    private JButton eight;
    private JButton four;
    private JButton nine;
    private JButton six;
    private JButton three;
    private JButton five;
    private JPanel panel_2;
    private JButton multiplication;
    private JButton sum;
    private JButton as;
    private JButton division;
    private String result="";
    private JButton Clear;
    private JButton zero;
    /**
     * Launch the application.
     */
    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                try {
                    Calculator frame = new Calculator();
                    frame.setVisible(true);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
    }

    /**
     * Create the frame.
     */
    public Calculator() {
        
        this.setResizable(false);
        
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setBounds(100, 100, 450, 600);
        contentPane = new JPanel();
        contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
        setContentPane(contentPane);
        contentPane.setLayout(new BorderLayout(0, 0));
        
        //******************************************这个地方放显示的数据一个Panel里面装的JText
        JPanel Top = new JPanel();                //**
        Top.setPreferredSize(new Dimension(450, 100));
        contentPane.add(Top, BorderLayout.NORTH);
        Top.setLayout(new GridLayout(0, 1, 0, 0));
                                                //**
        numberField = new JTextField();
        numberField.setFont(new Font("幼圆", Font.BOLD, 30));
        numberField.setBackground(Color.LIGHT_GRAY);
        numberField.setText("0");//
        Top.add(numberField);                    //**
        numberField.setColumns(10);
        
        numberField.setEditable(false);//不可编辑
        //监听器
        ActionListener click=null;
        click=new ActionListener() {
            
            @Override            
            public void actionPerformed(ActionEvent e) {            
                // TODO Auto-generated method stub
                //当输入一个数时，计算器上面的0消失        fi(FIrsInput)第一个数字
                String fi=numberField.getText().valueOf(0);
                System.out.println(fi);
                if(numberField.getText().equals("0")){numberField.setText(numberField.getText().replaceFirst("0", ""));}
                //@param operate是判断当时的按钮是什么
                String  operate=e.paramString().substring(21, 22);
                //考虑到如果先输入+-*/，这样会报错，不能让你输入
                if(numberField.getText().equals("")&&(operate.equals("+")||operate.equals("-")||operate.equals("x")||operate.equals("/"))) {
                    numberField.setText("");
                    System.out.println(fi);}
                else {    //如果按的是操作符+-*/
                        if(operate.equals("/")||operate.equals("+")||operate.equals("-")||operate.equals("x")) 
                        {    
                            if(numberField.getText().matches("\d*([x]|[/]|[-]|[+])\d*"))
                            {
                                numberField.setText(""+cal());
                            }
                            else {
                            if(!(numberField.getText().endsWith("x")||numberField.getText().endsWith("-")||numberField.getText().endsWith("+")||numberField.getText().endsWith("/"))) 
                            {
                                numberField.setText(numberField.getText()+operate);
                            }
                            }
                        }
                        else//这是按了其他数字键
                        {
                            int number=Integer.parseInt(operate);
                            numberField.setText(numberField.getText()+number);
                        }
                    }
            }
        };
    
        panel = new JPanel();
        panel.setPreferredSize(new Dimension(320, 250));
        contentPane.add(panel, BorderLayout.WEST);
        
        two = new JButton("2");
        two.addActionListener(click);
        two.setBorder(new LineBorder(new Color(0, 0, 0)));
        two.setMargin(new Insets(10, 14, 2, 14));
        two.setFont(new Font("幼圆", Font.PLAIN, 30));
        two.setPreferredSize(new Dimension(100, 115));
        
        three = new JButton("3");
        three.addActionListener(click);
        three.setBorder(new LineBorder(new Color(0, 0, 0)));
        three.setMargin(new Insets(10, 14, 2, 14));
        three.setFont(new Font("幼圆", Font.PLAIN, 30));
        three.setPreferredSize(new Dimension(100, 115));
        
        four = new JButton("4");
        four.addActionListener(click);
        four.setBorder(new LineBorder(new Color(0, 0, 0)));
        four.setMargin(new Insets(10, 14, 2, 14));
        four.setFont(new Font("幼圆", Font.PLAIN, 30));
        four.setPreferredSize(new Dimension(100, 115));
        
        five = new JButton("5");
        five.addActionListener(click);
        five.setBorder(new LineBorder(new Color(0, 0, 0)));
        five.setMargin(new Insets(10, 14, 2, 14));
        five.setFont(new Font("幼圆", Font.PLAIN, 30));
        five.setPreferredSize(new Dimension(100, 115));
        
        six = new JButton("6");
        six.addActionListener(click);
        six.setBorder(new LineBorder(new Color(0, 0, 0)));
        six.setMargin(new Insets(10, 14, 2, 14));
        six.setFont(new Font("幼圆", Font.PLAIN, 30));
        six.setPreferredSize(new Dimension(100, 115));
        
        seven = new JButton("7");
        seven.addActionListener(click);
        seven.setBorder(new LineBorder(new Color(0, 0, 0)));
        seven.setMargin(new Insets(10, 14, 2, 14));
        seven.setFont(new Font("幼圆", Font.PLAIN, 30));
        seven.setPreferredSize(new Dimension(100, 115));
        
        eight = new JButton("8");
        eight.addActionListener(click);
        eight.setBorder(new LineBorder(new Color(0, 0, 0)));
        eight.setMargin(new Insets(10, 14, 2, 14));
        eight.setFont(new Font("幼圆", Font.PLAIN, 30));
        eight.setPreferredSize(new Dimension(100, 115));
        
        nine = new JButton("9");
        nine.addActionListener(click);
        nine.setBorder(new LineBorder(new Color(0, 0, 0)));
        nine.setMargin(new Insets(10, 14, 2, 14));
        nine.setFont(new Font("幼圆", Font.PLAIN, 30));
        nine.setPreferredSize(new Dimension(100, 115));
        panel.setLayout(new FlowLayout(FlowLayout.CENTER, 5, 5));
        
        one = new JButton("1");
        //**************
        one.addActionListener(click);
        one.setBorder(new LineBorder(new Color(0, 0, 0)));
        one.setMargin(new Insets(10, 14, 2, 14));
        one.setFont(new Font("幼圆", Font.PLAIN, 30));
        one.setPreferredSize(new Dimension(100, 115));
        panel.add(one);
        panel.add(two);
        panel.add(three);
        panel.add(four);
        panel.add(five);
        panel.add(six);
        panel.add(seven);
        panel.add(eight);
        panel.add(nine);
        
        panel_1 = new JPanel();
        contentPane.add(panel_1, BorderLayout.EAST);
        panel_1.setLayout(new BorderLayout(0, 0));
        
        subtraction = new JButton("-");
        subtraction.addActionListener(click);
        subtraction.setFont(new Font("幼圆", Font.BOLD, 30));
        subtraction.setPreferredSize(new Dimension(90, 126));
        panel_1.add(subtraction, BorderLayout.NORTH);
        
        sum = new JButton("+");
        sum.addActionListener(click);
        sum.setFont(new Font("幼圆", Font.BOLD, 30));
        sum.setPreferredSize(new Dimension(90, 100));
        panel_1.add(sum, BorderLayout.SOUTH);
        
        Clear = new JButton("C");
        Clear.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                numberField.setText("");
            }
        });
        Clear.setPreferredSize(new Dimension(90, 126));
        panel_1.add(Clear, BorderLayout.WEST);
        
        panel_2 = new JPanel();
        panel_2.setPreferredSize(new Dimension(10, 80));
        contentPane.add(panel_2, BorderLayout.SOUTH);
        panel_2.setLayout(new BorderLayout(0, 0));
        
        multiplication = new JButton("x");
        multiplication.addActionListener(click);
        multiplication.setFont(new Font("幼圆", Font.BOLD, 30));
        multiplication.setMargin(new Insets(2, 0, 2, 50));
        multiplication.setPreferredSize(new Dimension(150, 100));
        panel_2.add(multiplication, BorderLayout.WEST);
        
        as = new JButton("=");
        as.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                numberField.setText(""+cal());
            }
        });
        
        as.setFont(new Font("幼圆", Font.BOLD, 30));
        as.setPreferredSize(new Dimension(150, 100));
        panel_2.add(as, BorderLayout.EAST);
        
        division = new JButton("/");
        division.addActionListener(click);
        division.setFont(new Font("幼圆", Font.BOLD, 30));
        division.setPreferredSize(new Dimension(150, 100));
        panel_2.add(division, BorderLayout.CENTER);
        
        zero = new JButton("0");
        zero.addActionListener(click);
        zero.setFont(new Font("宋体", Font.PLAIN, 20));
        panel_2.add(zero, BorderLayout.NORTH);
        //******************************************
        
    

    }
    
    public int sum(String zhi) 
    {
        this.result=result+zhi;
        
        return Integer.parseInt(result);
    }
    //运算的方法，运算；；；；
    public int cal() {
        //如果为空直接返回了
        String patt= "\d*([x]|[-]|[+]|[/])\d*";
        if(!numberField.getText().matches(patt)) {return 0;}
                                               
        //加减乘除
        String zhi=numberField.getText();
        if        (zhi.contains("x")) {
            String head=zhi.split("x")[0];
            String foot=zhi.split("x")[1];
            //返回乘法
            return p(head)*p(foot);    
        }else if(zhi.contains("/")) {
            String head=zhi.split("/")[0];
            String foot=zhi.split("/")[1];
            //返回触发
            return p(head)/p(foot);
        
        }else if(zhi.contains("+")) {
            String head=zhi.split("[+]")[0];
            String foot=zhi.split("[+]")[1];
            
            //返回假发
            return (p(head))+(p(foot));
        }else if(zhi.contains("-")) {
            String head=zhi.split("-")[0];
            String foot=zhi.split("-")[1];
            //返回减法
            return p(head)-p(foot);
        }
        
        
        return 0;
        
//        System.out.println(zhi.indexOf("x"));
//        System.out.println("head:"+head);
//        System.out.println("foot:"+foot);
//        return parseInt(head)*parseInt(foot);
    }
    //parseInt磨成int类型
    public int p(String str) 
    {
        return Integer.parseInt(str);    
    }
}