كود آله حاسبه قمت بعمله منذ شهرين تقريبا

/*
	Programmer:Shab Muslem
  Date Written:  24.03.2004

  Design and implement, in Java, a simple working calculator with
  a friendly user interface using your choice of the Java layout managers.
  This should incorporate a button for each of the numbers 0 to 9,
  a button for the = sign and buttons for the +, - , / ,* operators.
  A read only display area will also be needed.
  The calculator must be fully functional.
  Divide by zero must be trapped.
  Feel free to add any extra functionality.
*/


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

public class  calculator4  extends JFrame
{

	private JTextField result; // create a JLabel
	private JButton btn0n,btn1n,btn2n, btn3n,btn4n ,btn5n ,btn6n ,btnBin ,btnDecimal;
	private JButton btn7n ,btn8n ,btn9n,btnPower,btnC,btnBackspace;
	private JButton	btnPlus ,btnMin ,btnMul ,btnD, btnEqual,btnDec ,btnsqrt,btnsqrd ,btnNeg;
	double opt1, opt2;
	String sign;
	String num1= "";


	private JPanel resultpanel, buttonpanel;

	public calculator4()
	{
 	 super (" Shab Muslem  calculator's ");

 	 Container c = getContentPane ();
 	 resultpanel = new JPanel();
 	 result = new JTextField("0                                                                                                                                       ");

 	 result.setBackground(Color.yellow);
 	 result.setFont(new Font( "Serif", Font.BOLD,14));
 	 resultpanel.add (result);
 	 c.setLayout(new BorderLayout() );
 	 c.add (resultpanel,BorderLayout.NORTH);

 	 buttonpanel = new JPanel(new GridLayout (6,4) );
 	 c.add (buttonpanel,BorderLayout.CENTER);

 	 btn7n = new JButton("7");
 	 buttonpanel.add (btn7n);
 	 btn8n = new JButton("8");
 	 buttonpanel.add (btn8n);
 	 btn9n = new JButton("9");
 	 buttonpanel.add (btn9n);
 	 btnD = new JButton("/");
 	 btnD.setBackground(Color.white);
 	 buttonpanel.add (btnD);
 	 btn4n = new JButton("4");
 	 buttonpanel.add (btn4n);
 	 btn5n = new JButton("5");
 	 buttonpanel.add (btn5n);
 	 btn6n = new JButton("6");
 	 buttonpanel.add (btn6n);
 	 btnMul = new JButton("*");
 	 btnMul.setBackground(Color.white);
 	 buttonpanel.add (btnMul);
 	 btn1n = new JButton("1");
 	 buttonpanel.add (btn1n);
 	 btn2n = new JButton("2");
 	 buttonpanel.add (btn2n);
 	 btn3n = new JButton("3");
 	 buttonpanel.add (btn3n);
 	 btnMin = new JButton("-");
 	 btnMin.setBackground(Color.white);
 	 buttonpanel.add (btnMin);
 	 btn0n = new JButton("0");
 	 buttonpanel.add (btn0n);
 	 btnNeg = new JButton("+/-");
 	 btnNeg.setBackground(Color.white);
 	 buttonpanel.add (btnNeg);
 	 btnDec = new JButton(".");
 	 btnDec.setBackground(Color.white);
 	 buttonpanel.add (btnDec);
 	 btnPlus = new JButton("+");
 	 btnPlus.setBackground(Color.white);
 	 buttonpanel.add (btnPlus);
 	 btnsqrt = new JButton("square root");
 	 btnsqrt.setBackground(Color.green);
 	 buttonpanel.add (btnsqrt);
 	 btnsqrd = new JButton("sqrd");
 	 btnsqrd.setBackground(Color.green);
 	 buttonpanel.add (btnsqrd);
 	 btnPower = new JButton("power");
 	 btnPower.setBackground(Color.green);
 	 buttonpanel.add (btnPower);
 	 btnEqual = new JButton("=");
 	 btnEqual.setBackground(Color.cyan);
 	 buttonpanel.add (btnEqual);

 	 btnBin = new JButton("Decimal To Binary");
 	 btnBin.setBackground(Color.green);
 	 buttonpanel.add (btnBin);
 	 btnDecimal = new JButton("Binary To Decimal");
 	 btnDecimal.setBackground(Color.green);
 	 buttonpanel.add (btnDecimal);
 	 btnBackspace = new JButton("Backspace");
 	 btnBackspace.setBackground(Color.green);
 	 buttonpanel.add (btnBackspace);
 	 btnC = new JButton("C");
 	 btnC.setBackground(Color.pink);
 	 buttonpanel.add (btnC);

 	 ButtonHandler handler = new ButtonHandler();
 	 btn0n.addActionListener( handler );
 	 btn1n.addActionListener( handler );
 	 btn2n.addActionListener( handler );
 	 btn3n.addActionListener( handler );
 	 btn4n.addActionListener( handler );
 	 btn5n.addActionListener( handler );
 	 btn6n.addActionListener( handler );
 	 btn7n.addActionListener( handler );
 	 btn8n.addActionListener( handler );
 	 btn9n.addActionListener( handler );
 	 btnDec.addActionListener( handler );
 	 btnNeg.addActionListener( handler );
 	 btnC.addActionListener( handler );

 	 OperatorButtonHandler handleOperator = new OperatorButtonHandler();
 	 btnD.addActionListener( handleOperator );
 	 btnMul.addActionListener( handleOperator );
 	 btnMin.addActionListener( handleOperator );
 	 btnPlus.addActionListener( handleOperator );
 	 btnsqrt.addActionListener( handleOperator );
 	 btnsqrd.addActionListener( handleOperator );
 	 btnPower.addActionListener( handleOperator );
 	 btnBackspace.addActionListener( handleOperator );
 	 btnBin.addActionListener( handleOperator );
 	 btnDecimal.addActionListener( handleOperator );

 	 OperatorButtonHandler2 handleOperator2 = new OperatorButtonHandler2();
 	 btnEqual.addActionListener( handleOperator2 );

 	 setSize ( 560,310 );
 	 show();
	}

	public static void main (String args[])
	{
  calculator4 app = new calculator4();

  app.addWindowListener( new WindowAdapter ()
  {public void windoClosing ( WindowEvent e ){System.exit (0);}
  } );
	}

	private class ButtonHandler implements ActionListener
	{
  public void actionPerformed(ActionEvent ae)
  {

 	 String str = ae.getActionCommand();

 	 if (str.equals("0") )
 	 {
    num1=num1+ "0";
    result.setText(""+ num1);
 	 }
   	 else if (str.equals("1") )
   	 {
    num1=num1+ "1";
    result.setText(""+ num1);
 	 }
   	 else if (str.equals("2") )
   	 {
    num1=num1+ "2";
    result.setText(""+ num1);
 	 }
 	 else if (str.equals("3") )
 	 {
    num1=num1+ "3";
    result.setText(""+ num1);
 	 }
 	 else if (str.equals("4") )
 	 {
    num1=num1+ "4";
    result.setText(""+ num1);
 	 }
 	 else if (str.equals("5") )
 	 {
    num1=num1+ "5";
    result.setText(""+ num1);
 	 }
 	 else if (str.equals("6") )
 	 {
    num1=num1+ "6";
    result.setText(""+ num1);
 	 }
 	 else if (str.equals("7") )
 	 {
    num1=num1+ "7";
    result.setText(""+ num1);
 	 }
 	 else if (str.equals("8") )
 	 {
    num1=num1+ "8";
    result.setText(""+ num1);
 	 }

 	 else if (str.equals("9") )
 	 {
    num1=num1+ "9";
    result.setText(""+ num1);
 	 }
 	 else if (str.equals(".") )
 	 {
    num1=num1+ ".";
    result.setText(""+ num1);
 	 }
 	 else if (str.equals("+/-") )
 	 {
    num1=num1+ "-";
    result.setText(""+ num1);
 	 }
 	 else if (str.equals("power") )
 	 {
    num1=num1+ "power";
    result.setText(""+ num1);
 	 }
 	 else if (str.equals("C") )
 	 {
    num1="";
    result.setText("0");
 	 }
  }
	}

	private class OperatorButtonHandler implements ActionListener
	{
  public void actionPerformed(ActionEvent ae)
  {
 	 String str1 = ae.getActionCommand();

 	 if (str1.equals("+") )
 	 {
    opt1= Double.parseDouble(num1);
    result.setText( "+");
    sign = "+";
    num1="";
 	 }
 	 else if (str1.equals("-") )
 	 {
    opt1=Double.parseDouble(num1);
    result.setText( "-");
    sign = "-";
    num1="";
 	 }
 	 else if (str1.equals("*") )
 	 {
    opt1=Double.parseDouble(num1);
    result.setText( "*");
    sign = "*";
    num1="";
 	 }
 	 else if (str1.equals("/") )
 	 {
    opt1=Double.parseDouble(num1);
    result.setText( "/");
    sign = "/";
    num1="";
 	 }

 	 else if (str1.equals("square root") )
 	 {
    opt1=Double.parseDouble(num1);
    double a =Math.sqrt( opt1 );
    result.setText( ""+a);
    num1="";
 	 }

 	 else if (str1.equals("sqrd") )
 	 {
    opt1=Double.parseDouble(num1);
    double a = opt1*opt1;
    result.setText( ""+a);
    num1="";
 	 }

 	 else if (str1.equals("power") )
 	 {
    opt1=Double.parseDouble(num1);
    result.setText( "power");
    sign = "power";
    num1="";
 	 }

 	 else if (str1.equals("Backspace") )
 	 {
    if (num1.length() > 1)
    {
   	 num1=num1.substring(0,num1.length()-1);
   	 result.setText( ""+num1);
    }
    else
    {
   	 num1="";
   	 result.setText("0");
    }
 	 }

 	 else if (str1.equals("Decimal To Binary") )
 	 {
    String	m="";
    double b =Double.parseDouble(num1);
    int a  = (int)(b);
    int number = a;
    if(b < 1)
    {
   	 result.setText( "The decimal number   "+b+ "  smaller than one. Please Re-Enter number larger than one.  " );
   	 num1="";
    }
    else
    {

   	 while (a > 0)
   	 {
      if ( a%2==0)
      {
     	 a = a/2;
     	 m= "0" +m;
      }
      else
      {
     	 a = a/2;
     	 m ="1"+ m;
      }
   	 }
   	 result.setText( "The decimal number   "+number+ "   =  " +m+ "   in Binary  ");
   	 num1="";
    }
 	 }

 	 else if (str1.equals("Binary To Decimal") )
 	 {
    String theNum1 = num1;
    int a  =Integer.parseInt(num1);
    int i,sum=0,count, m;

    boolean isNotB = false;

    int lengthNum =num1.length();

    while( num1.length() !=0)
    {
   	 String ferstNum = num1.substring(0,1);
   	 int Nub  =Integer.parseInt(ferstNum);

   	 if(num1.length() !=0)
      num1=num1.substring(1,num1.length());

   	 if(Nub !=0 && Nub !=1)
      isNotB = true;
    }
    if(isNotB == true)
   	 result.setText( " This number   "  +a+ "    is  not  binary  number. Please Re-Enter binary number   " );

    else
    {
   	 count = theNum1.length();

   	 for ( i=(count);i>=0;i--)
   	 {
      m =a/ (int)(Math.pow(10,i));
      if (m%2 ==1)
      sum += Math.pow(2,i);
   	 }
   	 result.setText( "The binary number   "+a+ "   =  "+ +sum+ "   in Decimal  ");
   	 num1="";
    }
 	 }

  }
	}

	private class OperatorButtonHandler2 implements ActionListener
	{
  public void actionPerformed(ActionEvent ae)
  {
 	 String str2 = ae.getActionCommand();
 	 opt2= Double.parseDouble(num1);

 	 if ( sign.equals("+"))
 	 {
    double a = opt1 + opt2;
    result.setText( "  "+ opt1+"  " +sign+"  "+ opt2+"  =  "+ a   );
    num1="";
 	 }
 	 else if ( sign.equals("-"))
 	 {
    double a = opt1 - opt2;
    result.setText(  "  "+ opt1+"  " +sign+"  "+ opt2+"  =  "+ a  );
    num1="";
 	 }
 	 else if ( sign.equals("*"))
 	 {
    double a = opt1 * opt2;
    result.setText(  "  "+ opt1+"  " +sign+"  "+ opt2+"  =  "+ a );
    num1="";
 	 }
 	 else if ( sign.equals("power"))
 	 {
    double a = Math.pow(opt1, opt2) ;
    result.setText(  "  "+ opt1+"  " +sign+"  "+ opt2+"  =  "+ a );
    num1="";
 	 }
 	 else if ( sign.equals("/"))
 	 {
    if ( opt2 == 0)
    {
   	 result.setText("Cannot divide by zero.");
   	 num1="";
    }
    else
    {
   	 double a = opt1 / opt2;
   	 result.setText(  "  "+ opt1+"  " +sign+"  "+ opt2+"  =  "+ a  );
   	 num1="";
    }
 	 }
  }
	}
}