frame1.java~156~

简单的java计算器程序

    {
      str=str+e.getActionCommand();
      result1.setText(str);
    }
  }

  void jb1deng_actionPerformed(ActionEvent e) {
   endnum = Double.parseDouble(result1.getText());
       if (flagAdd) {                                                             //加法运算
         result1.setText(String.valueOf(startnum + endnum));
         status1.setText(startnum + "+ " + endnum + " = " +
                        String.valueOf(startnum + endnum));
         isResult = true;
         flagAdd = !flagAdd;

       }
        //减法运算
       if (flagSub) {
         result1.setText(String.valueOf(startnum - endnum));
         status1.setText(startnum + "- " + endnum + " = " +
                        String.valueOf(startnum - endnum));
         isResult = true;
         flagSub = !flagSub;
       }
        //乘法运算
       if (flagMul) {
         result1.setText(String.valueOf(startnum * endnum));
         status1.setText(startnum + "x " + endnum + " = " +
                        String.valueOf(startnum * endnum));
         isResult = true;
         flagMul = !flagMul;
       }
       //除法运算
       if (flagDiv) {
         if (endnum == 0) {  //判断除数是否为零
           status1.setText("除数不能为零，请重新输入！");
           result1.setText("ERROR");
         }
         else {
           result1.setText(String.valueOf(startnum/endnum));
           status1.setText(startnum + "% " + endnum + " = " +
                          String.valueOf(startnum/endnum));
           isResult = true;
           flagDiv = !flagDiv;
         }
       }
  }
  //按键sin
  void jb1sin_actionPerformed(ActionEvent e) {
    double x;
     x=Double.parseDouble(result1.getText());
     result1.setText(String.valueOf(Math.sin(x)));
     isResult=true;
  }
  //按键cos
  void jb1cos_actionPerformed(ActionEvent e) {
  double x;
    x=Double.parseDouble(result1.getText());
    result1.setText(String.valueOf(Math.cos(x)));
    isResult=true;
  }
  //按键+/-
  void jb1fu_actionPerformed(ActionEvent e) {
    String s1,s2,s3;
    double  x1,x2,x3;
    s2=result1.getText();
    s1="0";
    x1=Double.parseDouble(s1);
    x2=Double.parseDouble(s2);
    x3=x1-x2;
    s3=Double.toString(x3);
    result1.setText(s3);
  }
 //按键-
  void jb1jia_actionPerformed(ActionEvent e) {
   startnum=Double.parseDouble(result1.getText());
    flagAdd=true;
    isResult=true;
  }

  void jb1jian_actionPerformed(ActionEvent e) {
   startnum=Double.parseDouble(result1.getText());
    flagSub=true;
    isResult=true;
  }
  //按键*
  void jb1cheng_actionPerformed(ActionEvent e) {
  startnum=Double.parseDouble(result1.getText());
    flagMul=true;
    isResult=true;
  }
  //按键/
  void jb1chu_actionPerformed(ActionEvent e) {
  startnum=Double.parseDouble(result1.getText());
    flagDiv=true;
    isResult=true;
  }
  //菜单栏
  void jMenuItem3_actionPerformed(ActionEvent e) {
  cardLayout2.next(contentPane);
  }

  void jMenuItem1_actionPerformed(ActionEvent e) {
   try{String command="notepad.exe c:\\Calculator\\usemethod.txt";
    Runtime.getRuntime().exec(command);
    }

  catch(IOException ex){}
  }

  void jMenuItem2_actionPerformed(ActionEvent e) {
   try{String command="notepad.exe c:\\Calculator\\readme.txt";
   Runtime.getRuntime().exec(command);
   }catch(IOException ex){}
  }

  void qingling11_actionPerformed(ActionEvent e) {
   result1.setText("0");
   status1.setText("清零成功！");
  }
  //按键。
  void jb2dian_actionPerformed(ActionEvent e) {
   String s2,s3;
   char a[]=result2.getText().toCharArray();
   int j=0;
   for(int i=0;i<a.length;i++)
      if(a[i]=='.')
        j=1;
       if(j==0)
         {str=result2.getText();
          s2=e.getActionCommand();
          s3=str+s2;
          result2.setText(s3);
          }
          else
          {status2.setText("您的输入有问题，请重新输入！");
          result2.setText("ERROR");
          isResult=true;
          }
  }

  void jb1dian_actionPerformed(ActionEvent e) {
     String s2,s3;
   char a[]=result1.getText().toCharArray();
   int j=0;
   for(int i=0;i<a.length;i++)
      if(a[i]=='.')
        j=1;
       if(j==0)
         {str=result1.getText();
          s2=e.getActionCommand();
          s3=str+s2;
          result1.setText(s3);
          }
          else
          {status1.setText("您的输入有问题，请重新输入！");
          result1.setText("ERROR");
          isResult=true;
          }
  }
 //按键 back
  void jb2back_actionPerformed(ActionEvent e) {
    str=result2.getText();
   str=str.substring(0,str.length()-1);
    if(str.length()==0)
      {str="0";
       status2.setText("这已经是最后一个数字！");
       }
       else
  {
    result2.setText(str);
  }
}

  void jb1back_actionPerformed(ActionEvent e) {
   str=result1.getText();
   str=str.substring(0,str.length()-1);
    if(str.length()==0)
      {str="0";
       status1.setText("这已经是最后一个数字！");
       }
       else
  {
    result1.setText(str);
  }
  }
  void jButton1_actionPerformed(ActionEvent e) {
  System.exit(0);
  }
  void jb32_actionPerformed(ActionEvent e) {
    if(isResult)
        {
         result3.setText("0");
         isResult=!isResult;
        }
        str=result3.getText();
        if(str.equals("0"))
        {
          result3.setText(e.getActionCommand());
        }
        else
        {
          str=str+e.getActionCommand();
          result3.setText(str);
    }
  }
  void jb3cheng_actionPerformed(ActionEvent e) {
    startnum=Double.parseDouble(result3.getText());
     flagMul=true;
    isResult=true;
  }
  void jb37_actionPerformed(ActionEvent e) {
    if(isResult)
     {
      result3.setText("0");
      isResult=!isResult;
     }
     str=result3.getText();
     if(str.equals("0"))
     {
       result3.setText(e.getActionCommand());
     }
     else
     {
       str=str+e.getActionCommand();
       result3.setText(str);
    }
  }
  void jb33_actionPerformed(ActionEvent e) {
    if(isResult)
       {
        result3.setText("0");
        isResult=!isResult;
       }
       str=result3.getText();
       if(str.equals("0"))
       {
         result3.setText(e.getActionCommand());
       }
       else
       {
         str=str+e.getActionCommand();
         result3.setText(str);
    }
  }
  void jb38_actionPerformed(ActionEvent e) {
    if(isResult)
      {
       result3.setText("0");
       isResult=!isResult;
      }
      str=result3.getText();
      if(str.equals("0"))
      {
        result3.setText(e.getActionCommand());
      }
      else
      {
        str=str+e.getActionCommand();
        result3.setText(str);
    }
  }
  void jb3fu_actionPerformed(ActionEvent e) {
    String s1,s2,s3;
     double  x1,x2,x3;
     s2=result3.getText();
     s1="0";
     x1=Double.parseDouble(s1);
     x2=Double.parseDouble(s2);
     x3=x1-x2;
     s3=Double.toString(x3);
    result3.setText(s3);
  }
  void jb39_actionPerformed(ActionEvent e) {
    if(isResult)
      {
       result3.setText("0");
       isResult=!isResult;
      }
      str=result3.getText();
      if(str.equals("0"))
      {
        result3.setText(e.getActionCommand());
      }
      else
      {
        str=str+e.getActionCommand();
        result3.setText(str);
    }
  }
  void button5_actionPerformed(ActionEvent e) {
    startnum=Double.parseDouble(result3.getText());
     flagDiv=true;
    isResult=true;
  }
  void jb30_actionPerformed(ActionEvent e) {
    if(isResult)
       {
        result3.setText("0");
        isResult=!isResult;
       }
       str=result3.getText();
       if(str.equals("0"))
       {
         result3.setText(e.getActionCommand());
       }
       else
       {
         str=str+e.getActionCommand();
         result3.setText(str);
       }

  }
  void jb34_actionPerformed(ActionEvent e) {
    if(isResult)
      {
       result3.setText("0");
       isResult=!isResult;
      }
      str=result3.getText();
      if(str.equals("0"))
      {
        result3.setText(e.getActionCommand());
      }
      else
      {
        str=str+e.getActionCommand();
        result3.setText(str);
    }
  }
  void jb3dian_actionPerformed(ActionEvent e) {
    String s2,s3;
   char a[]=result3.getText().toCharArray();
   int j=0;
   for(int i=0;i<a.length;i++)
      if(a[i]=='.')
        j=1;
       if(j==0)
         {str=result3.getText();
          s2=e.getActionCommand();
          s3=str+s2;
          result3.setText(s3);
          }
          else
          {status3.setText("您的输入有问题，请重新输入！");
          result3.setText("ERROR");
          isResult=true;
          }
  }
  void jb3cos_actionPerformed(ActionEvent e) {
    double x;
      x=Double.parseDouble(result3.getText());
      result3.setText(String.valueOf(Math.cos(x)));
    isResult=true;
  }
  void jb3deng_actionPerformed(ActionEvent e) {
    endnum = Double.parseDouble(result3.getText());
      if (flagAdd) {                                                             //加法运算
        result3.setText(String.valueOf(startnum + endnum));
        status3.setText(startnum + "+ " + endnum + " = " +
                       String.valueOf(startnum + endnum));
        isResult = true;
        flagAdd = !flagAdd;

      }
      if (flagSub) {                                                             //减法运算
        result3.setText(String.valueOf(startnum - endnum));
        status3.setText(startnum + "- " + endnum + " = " +
                       String.valueOf(startnum - endnum));
        isResult = true;
        flagSub = !flagSub;
      }
      if (flagMul) {                                                             //乘法运算
        result3.setText(String.valueOf(startnum * endnum));
        status3.setText(startnum + "x " + endnum + " = " +
                       String.valueOf(startnum * endnum));
        isResult = true;
        flagMul = !flagMul;
      }
      if (flagDiv) {                                                             //除法运算
        if (endnum == 0) {                                                       //判断除数是否为零
          status3.setText("除数不能为零，请重新输入!");
          result3.setText("ERROR");
        }
        else {
          result3.setText(String.valueOf(startnum/endnum));
          status3.setText(startnum + "% " + endnum + " = " +
                         String.valueOf(startnum/endnum));
          isResult = true;
          flagDiv = !flagDiv;
        }
       }
  }
  void jb3jia_actionPerformed(ActionEvent e) {
    startnum=Double.parseDouble(result3.getText());
      flagAdd=true;
    isResult=true;
  }
  void jb3sin_actionPerformed(ActionEvent e) {
    double x;
      x=Double.parseDouble(result3.getText());
      result3.setText(String.valueOf(Math.sin(x)));
     isResult=true;
  }
  void jb35_actionPerformed(ActionEvent e) {
    if(isResult)
        {
         result3.setText("0");
         isResult=!isResult;
        }
        str=result3.getText();
        if(str.equals("0"))
        {
          result3.setText(e.getActionCommand());
        }
        else
        {
          str=str+e.getActionCommand();
          result3.setText(str);
    }
  }
  void jb36_actionPerformed(ActionEvent e) {
    if(isResult)
        {
         result3.setText("0");
         isResult=!isResult;
        }
        str=result3.getText();
        if(str.equals("0"))
        {
          result3.setText(e.getActionCommand());
        }
        else
        {
          str=str+e.getActionCommand();
          result3.setText(str);
    }
  }
  void jb3jian_actionPerformed(ActionEvent e) {
    startnum=Double.parseDouble(result3.getText());
       flagSub=true;
    isResult=true;
  }
  void jb31_actionPerformed(ActionEvent e) {
    if(isResult)
        {
         result3.setText("0");
         isResult=!isResult;
        }
        str=result3.getText();
        if(str.equals("0"))
        {
          result3.setText(e.getActionCommand());
        }
        else
        {
          str=str+e.getActionCommand();
          result3.setText(str);
    }
  }
  void jb3c_actionPerformed(ActionEvent e) {
    result3.setText("0");
    status3.setText("清零成功！");
  }
  void jb3back_actionPerformed(ActionEvent e) {
    str=result3.getText();
   str=str.substring(0,str.length()-1);
    if(str.length()==0)
      {str="0";
       status3.setText("这已经是最后一个数字！");
       }
       else
  {
    result3.setText(str);
  }
  }
}