jisuanqi.java

计算器,表 格等很多功能就在这里,的确是这样的.

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.util.Vector;

public class jisuanqi
 { 
 
 String str1="0";
 String str2="0";
 String fh="+";
 String jg="";
 
 int k1=1;
 int k2=1;
 int k3=1;
 int k4=1;
 int k5=1;
 JButton jicunqi;
 Vector vt=new Vector(15,10);
 
 JFrame frame=new JFrame("计算器    ");
 JTextField jg_TextField=new JTextField(jg,20);
 JButton clear_Button=new JButton("清除");
 JButton button0=new JButton("0");
 JButton button1=new JButton("1");
 JButton button2=new JButton("2");
 JButton button3=new JButton("3");
 JButton button4=new JButton("4");
 JButton button5=new JButton("5");
 JButton button6=new JButton("6");
 JButton button7=new JButton("7");
 JButton button8=new JButton("8");
 JButton button9=new JButton("9");
 JButton button_Dian=new JButton(".");
 JButton button_jia=new JButton("+");
 JButton button_jian=new JButton("-");
 JButton button_cheng=new JButton("*");
 JButton button_chu=new JButton("/");
 JButton button_dy=new JButton("=");
 
 public static void main(String[] args)
 {
  jisuanqi qiyanjie=new jisuanqi();
 }
 jisuanqi()
 {
  
  button0.setMnemonic(KeyEvent.VK_0);


  jg_TextField.setHorizontalAlignment(JTextField.RIGHT );
  
  JPanel pan=new JPanel();
  pan.setLayout(new GridLayout(4,4,5,5));
  pan.add(button7);
  pan.add(button8);
  pan.add(button9);
  pan.add(button_chu);
  pan.add(button4);
  pan.add(button5);
  pan.add(button6);
  pan.add(button_cheng);
  pan.add(button1);
  pan.add(button2);
  pan.add(button3);
  pan.add(button_jian);
  pan.add(button0);
  pan.add(button_Dian);
  pan.add(button_dy);
  pan.add(button_jia);
  pan.setBorder(BorderFactory.createEmptyBorder(4,4,4,4));
  
  JPanel pan2=new JPanel();
  pan2.add(jg_TextField);
  
  
  JPanel pan3=new JPanel();
  pan3.setLayout(new FlowLayout());
  pan3.add(clear_Button);

  
  frame.setLocation(200, 100);
  frame.setResizable(false);
  frame.getContentPane().setLayout(new BorderLayout());
  frame.getContentPane().add(pan2,BorderLayout.NORTH);
  frame.getContentPane().add(pan,BorderLayout.CENTER);
  frame.getContentPane().add(pan3,BorderLayout.SOUTH);
  
  
  frame.pack();
  frame.setVisible(true);
   class JianTing implements ActionListener
  {
   public void actionPerformed(ActionEvent e)
   {
    String ss=((JButton)e.getSource()).getText();
    jicunqi=(JButton)e.getSource(); 
    vt.add(jicunqi);    
    if (k1==1)
    {
     if(k3==1)
     {
      str1="";
      k5=1;     
     }
     str1=str1+ss;

     k3=k3+1;

     jg_TextField.setText(str1);
     
    }
    else if(k1==2)
    {
     if (k4==1)
     {
      str2="";
      k5=1;    
     }
     str2=str2+ss;

     k4=k4+1;
     jg_TextField.setText(str2);
    }
    }
  }
  class JianTing_fh implements ActionListener
  {
   public void actionPerformed(ActionEvent e)
   {
    String ss2=((JButton)e.getSource()).getText();
    jicunqi=(JButton)e.getSource();
    vt.add(jicunqi);
    
    if(k2==1)
    {
     k1=2;
     k5=1;
     fh=ss2;
     k2=k2+1;
    }
    else
    {
     int a=vt.size();
     JButton c=(JButton)vt.get(a-2);

     if(!(c.getText().equals("+"))&&!(c.getText().equals("-"))&&!(c.getText().equals("*"))&&!(c.getText().equals("/")))

     { yuns();
      str1=jg;
      k1=2;
      k5=1;
      k4=1;
      fh=ss2;
     } k2=k2+1;
     
    }
    
   }
  }
  class JianTing_clear implements ActionListener
  {
   public void actionPerformed(ActionEvent e)
   {
    jicunqi=(JButton)e.getSource();
    vt.add(jicunqi);
    k5=1;
    k2=1;
    k1=1;
    k3=1;
    k4=1;
    str1="0";
    str2="0";
    fh="";
    jg="";
    jg_TextField.setText(jg);
    vt.clear();
   }
  }
  class JianTing_dy implements ActionListener
  {
   public void actionPerformed(ActionEvent e)
   {
    
     jicunqi=(JButton)e.getSource();
     vt.add(jicunqi);
     yuns();
     k1=1;
     k2=1;
     k3=1;
     k4=1;
    
     str1=jg;
   }
  }
  class JianTing_xiaos implements ActionListener
  {
   public void actionPerformed(ActionEvent e)
   {
    jicunqi=(JButton)e.getSource();
    vt.add(jicunqi);
    if(k5==1)
    {
     String ss2=((JButton)e.getSource()).getText();
     if (k1==1)
     {
      if(k3==1)
      {
       str1="";
       k5=1;     
      }
      str1=str1+ss2;
      k3=k3+1;
      jg_TextField.setText(str1);
      
      
     }
     else if(k1==2)
     {
      if (k4==1)
      {
       str2="";
       k5=1;   
      }
      str2=str2+ss2;
      k4=k4+1;
       jg_TextField.setText(str2);
     }
    }
    
    k5=k5+1;
   }
  }
  JianTing_dy jt_dy=new JianTing_dy();
  JianTing jt= new JianTing();
  JianTing_fh jt_fh= new JianTing_fh();
  JianTing_clear jt_c=new JianTing_clear();
  JianTing_xiaos jt_xs=new JianTing_xiaos();
  
  
  button7.addActionListener(jt);
  button8.addActionListener(jt);
  button9.addActionListener(jt);
  button_chu.addActionListener(jt_fh);
  button4.addActionListener(jt);
  button5.addActionListener(jt);
  button6.addActionListener(jt);
  button_cheng.addActionListener(jt_fh);
  button1.addActionListener(jt);
  button2.addActionListener(jt);
  button3.addActionListener(jt);
  button_jian.addActionListener(jt_fh);
  button0.addActionListener(jt);
  button_Dian.addActionListener(jt_xs);
  button_dy.addActionListener(jt_dy);
  button_jia.addActionListener(jt_fh);
  clear_Button.addActionListener(jt_c);
  frame.addWindowListener(new WindowAdapter()
  {
   public void windowClosing(WindowEvent e)
   {
    System.exit(0);
   }
  });
  
  
 }
 public void yuns()
 {
  double a2;
  double b2;
  String c=fh;
  double jg2=0 ;
  
  if (c.equals(""))
  {
   jg_TextField.setText("请输入运算符");
  
  }
  else 
  {
       
   System.out.println("str1:"+str1);
   System.out.println("str2:"+str2);
   System.out.println("运算符:"+fh);
   if (str1.equals("."))
    str1="0.0";
   if (str2.equals("."))
    str2="0.0";
   a2=Double.valueOf(str1).doubleValue();
   b2=Double.valueOf(str2).doubleValue();
   
   System.out.println("double型的a2："+a2);
   System.out.println("double型的b2："+b2);
   
   
   if (c.equals("+"))
   {
    jg2=a2+b2;
   }
   if (c.equals("-"))
   {
    jg2=a2-b2;
   }
   if (c.equals("*"))
   {
    jg2=a2*b2;
   }
   if (c.equals("/"))
   {
   		if(b2==0)
   		{
   			jg2=0;
   		}
   		else
   		{
   			jg2=a2/b2;
   		}
   		}
   System.out.println("double型a2"+fh+"b2结果："+jg2);
   
   System.out.println();
   jg=((new Double(jg2)).toString());

   jg_TextField.setText(jg);
  }
 } 
}