package dialog_color;

 import java.awt.BorderLayout;

 import java.awt.Color;

 import java.awt.Container;

 import java.awt.FlowLayout;

 import java.awt.Font;

 import java.awt.GridLayout;

 import java.awt.Insets;

 import java.awt.event.ActionEvent;

 import java.awt.event.ActionListener;

 import java.math.BigInteger;

 import java.util.ArrayList;

 import java.util.List;

 import java.util.Stack;

 import java.util.regex.Matcher;

 import java.util.regex.Pattern;

 import javax.swing.BorderFactory;

 import javax.swing.ImageIcon;

 import javax.swing.JButton;

 import javax.swing.JFrame;

 import javax.swing.JLabel;

 import javax.swing.JPanel;

 import javax.swing.JTextField;

 import javax.swing.UIManager;

  /*简易计算器*/

 public class Simple_jisuanqi {

   public static  void main(String args []) {

        Caculate mycacu = new Caculate();

      //  Container con =mycacu.getContentPane();

        mycacu.setTitle("GXjun计算器");

   }

 }

 class Caculate extends JFrame implements ActionListener

 {

      Container  mycon;    //设置重量级容器

      JPanel  jpanel_1,jpanel_2,jpanel_3;    //设置轻量级布局

      myJButton button []= new myJButton [20];

      JTextField mytext;

      JLabel label;

     GridLayout grid = new GridLayout(4,4);

     Caculate(){          //构造函数

         mycon = getContentPane();

         jpanel_1 = new JPanel();  /*默认的格式为FlowLayout*/

         jpanel_2 =new JPanel();

         jpanel_3 = new JPanel();

         jpanel_2.setLayout(grid);

         mytext = new JTextField(14);

         mytext.setEditable(false);   //设置成为不能

         mytext.setFont(new Font("Arial",Font.BOLD,22));

        /* for(int i=0;i<20;i++)

          button[i]=new myJButton(null);*/

         button[0] = new myJButton(" 后退  ",22);

         button[0].addActionListener(this);

         button[1] = new myJButton("  归零  ",22);

         button[1].addActionListener(this);

         jpanel_1.add(button[0]);

         jpanel_1.add(mytext);

         jpanel_1.add(button[1]);

         label = new JLabel(new ImageIcon("C:\\Users\\Administrator.USERSWO-MKA59UH\\Desktop\\java\\bin\\dialog_color\\a.jpg"));

        // label = new JLabel(new ImageIcon("D:\\2\\2.gif"));

         jpanel_3.add(label);

         for(int i=2;i<12;i++)

             button[i]=new myJButton(" "+i+" ",26);

         char str[][]={{'7','8','9','/'},{'4','5','6','*'},{'1','2','3','-'},{'0','.','+','='}};

         for(int i=0;i<4;i++)

           for(int j=0;j<4;j++){

               button[2+i*4+j] =new myJButton("  "+str[i][j]+"  ",26);

               button[2+i*4+j].addActionListener(this);

               jpanel_2.add(button[2+i*4+j]);

             }

        mycon.add(jpanel_1,BorderLayout.CENTER);

        mycon.add(jpanel_3,BorderLayout.NORTH);

        mycon.add(jpanel_2,BorderLayout.SOUTH);

          init();

    }

    void init() /*相关组件的一系列的初始化*/

    {

      setBounds(100, 100, 477, 280);

      setVisible(true);

      setResizable(false);

      setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    }

    String str ="";

 @Override

 public void actionPerformed(ActionEvent e) {

     // TODO Auto-generated method stub

     //System.out.println(e.getActionCommand());

      if(e.getSource()==button[0]||e.getSource()==button[1])

       {

             if(e.getSource()==button[0]){

               System.out.println(str);

             if(!str.isEmpty()){

               str=str.substring(0, str.length()-1) ; //后退一格

              }

             }

             else str="";

       }

      else

      {

       if(e.getSource()==button[17]){

         //等于号的时候，又该如何处理？  正则表达式

         //System.out.println(e.getActionCommand());

          /*System.out.println(sove_calc(str));*/

           Double judge=sove_calc(str.trim());

           if(judge==Double.MAX_VALUE)

           {

               mytext.setText("error!");

               validate();

               return;

           }

           else str=judge.toString();

       }

       else{

           str+=e.getActionCommand().toString().trim();

       }

      }

      if(str.isEmpty())  mytext.setText("0");

      else mytext.setText(str);

         validate();

 }

 private Double sove_calc(String str)

 {

     /*怎么提起出字符串里面的运算符号呢*/

     Pattern mypa = Pattern.compile("\\+|\\-|\\*|\\/");

       Matcher mtma = mypa.matcher(str);

       List<String> listhoge = new ArrayList();

       while(mtma.find()) listhoge.add(mtma.group());

        String [] hoge = listhoge.toArray(new String [0]);  //获取运算符号

    /*突然遇到一个问题怎么从字符串提起浮点型数据呢？*/

      Pattern mypart = Pattern.compile("\\.\\d|\\d+(\\.\\d+)?");

      Matcher mtmatcher =mypart.matcher(str);

      List<String> listval = new ArrayList();

      while(mtmatcher.find())

        listval.add(mtmatcher.group());

      String [] val=listval.toArray(new String[0]);

      double sum=Double.parseDouble(val[0]);

     for( int i=0;i<hoge.length;i++)

     {

          System.out.println(hoge[i].charAt(0));

        switch(hoge[i].charAt(0))

        {

          case '+':  sum += Double.parseDouble(val[i+1]); break;

          case '-':  sum -= Double.parseDouble(val[i+1]); break;

          case '*':  sum *= Double.parseDouble(val[i+1]); break;

          case '/':

          {

             Double tem=Double.parseDouble(val[i+1]);

             if(tem.equals(0))  return Double.MAX_VALUE;

             sum/=tem;

             break;

          }

          default :  System.out.println("error!"); break;

        }

    }

   return sum;

 }

 }

 class  myJButton extends JButton

 {

   public myJButton(String name,int size)

   {

         // TODO Auto-generated constructor stub

       super(name);

       setFont(new Font("仿宋",Font.BOLD,size));

     setMargin(new Insets(2,2,2,2));

     setBorder(BorderFactory.createRaisedBevelBorder());

     setBackground(Color.LIGHT_GRAY);

   }

 }