mycalc.java

classical culculator but has some thing special that you can store your work in a file in the hard a

			pressed=true;
			memoryTag.setText("M");
			mem=Double.valueOf(s).doubleValue();
			if(mem==0)
				memoryTag.setText(" ");
			showStatus("Memory="+mem);
		}
		else if(e.getSource()==button[36])
		{
			pressed=true;
			memoryTag.setText("M");
			mem=mem+(Double.valueOf(s).doubleValue());
			if(mem==0)
				memoryTag.setText(" ");
			showStatus("Memory="+mem);
		}
		else if(e.getSource()==button[38])
		{
			pressed=true;
			memoryTag.setText("M");
			mem=mem-(Double.valueOf(s).doubleValue());
			if(mem==0)
				memoryTag.setText(" ");
			showStatus("Memory="+mem);

		}
		else if(e.getSource()==button[39])
		{
			s=""+mem;
			s3=s;
			t.setText(s3);
		}
		else if(e.getSource()==button[20])
		{
			pressed=true;
			double x=Double.valueOf(s).doubleValue();
			String s4 = deg.getSelectedCheckbox().getLabel();
			if (!cond3)
			{
			if(s4.equals("Deg"))
			{
				while(x>=360)
				 		x=x-360;
				s=""+MyMath.msin(MyMath.invert(x));
				t.setText(""+s);
			}
			else if(s4.equals("Rad"))
			{
				while(x>=(2*Math.PI))
				 		x=x-Math.PI;
					
				s=""+MyMath.msin(x);
				t.setText(s);
			}
			f.addTofile("Sin("+x+")="+s);
			}
			else
			{
			if(s4.equals("Deg"))
			{
				x=Double.valueOf(s).doubleValue();
				s=""+MyMath.invertt(Math.asin(x));
				t.setText(""+s);
			}
			else if(s4.equals("Rad"))
			{
				x=Double.valueOf(s).doubleValue();
				s=""+MyMath.invertt(Math.acos(x));
				t.setText(s);
			}
				s3=s;
				f.addTofile("aSin("+x+")="+s);
			}
		}
		else if(e.getSource()==button[21])
		{
			pressed=true;
			double x=Double.valueOf(s).doubleValue();
			String s4 = deg.getSelectedCheckbox().getLabel();
			if (!cond3)
			{
				 if(s4.equals("Deg"))
				 {
				 		while (x>=360)
				 			x=x-360;
					 	s=""+MyMath.mcos(MyMath.invert(x));
				 	 	t.setText(s);
						s3=s;
				}
				 else if(s4.equals("Rad"))
				 {
				 	while(x>=(2*Math.PI))
				 		x=x-Math.PI;
					 s=""+MyMath.mcos(x);
				 	t.setText(s);
					s3=s;
				}
			f.addTofile("Cos("+x+")="+s);
			}
				else
				{
					if(s4.equals("Deg"))

					{
						x=Double.valueOf(s).doubleValue();
						s=""+MyMath.invertt(Math.acos(x));
						t.setText(s);
						s3=s;
					}
					else if(s4.equals("Rad"))
					{
						x=Double.valueOf(s).doubleValue();
						s=""+MyMath.invertt(Math.acos(x));
						t.setText(s);
						s3=s;
					}
			f.addTofile("aCos("+x+")="+s);
			}
	    	}
	    else if(e.getSource()==button[23])
	    {
	    		 pressed=true;
	    		 double y=0;
				 double  x=Double.valueOf(s).doubleValue();
				 y=MyMath.mysqr(x);
				 t.setText(""+y);
				 s=""+y;
				 s3=s;
				 f.addTofile("sqr("+x+")="+s);

		}
		else if(e.getSource()==button[24])
	    {
		   	 pressed=true;
			 int x=Integer.valueOf(s).intValue();
			 if(x>39)
			 	t.setText("Invinit");
			 else
			 {
			 	s=""+MyMath.myX(x);
			 	t.setText(""+s);
			 	s3=s;
			 	f.addTofile(""+x+"!="+s);
			 }

		}
		else if(e.getSource()==button[2])
		{
			if(!cond3)
				{
					button[20].setLabel("arcSin");
					button[21].setLabel("arcCos");
					cond3=true;
				}
			else
				{
					cond3=false;
					button[20].setLabel("Sin");
					button[21].setLabel("Cos");
				}
		}
		else if(e.getSource()==button[40])
		{
			t.setText("0");
			mem=0;
			memoryTag.setText("");
		}
		else if(e.getSource()==button[26])
		{
			pressed=true;
			float p,r;
			p=Float.valueOf(s).floatValue();
			r=p/100;
			s=""+r;
			s3=s;
			t.setText(s);
			f.addTofile(""+p+"%="+s);

		}
		else if(e.getSource()==button[22])
		{
			pressed=true;
			 double l=0;
			 m=Double.valueOf(s).doubleValue();
			 l=Math.sqrt(m);
			 s=""+l;
			 s3=s;
			 t.setText(s);
			 f.addTofile("sqrt("+m+")="+s);

		}
		else if (e.getSource()==button[19])
		{
			pressed=true;
		  	t.setText(s3);
			s=s3;
			showStatus(s3);

		}
		else if (e.getSource()==button[17])
		{
			pressed=true;
			t.setText(""+3.1415926);
			s=""+3.1415926;

		}
    }

  public static void main(String args[])
		{
			Frame app=new Frame("Calculator");
			app.setSize(470,400);
			app.addWindowListener(new CloseWindowAndExit());
			MyCalc m=new MyCalc();
			m.init();
			m.start();
			app.add(m,BorderLayout.CENTER);
			app.setVisible(true);
	}
    
    class MyButton extends Button
    {
	public MyButton(String name,Color xyz)
	{
//here we override the constructor of the button 
//first we call the Main constructor and then
//we add the color proprty and response for mouse motion
		super(name);
		setBackground(xyz);
		addMouseListener(new MouseCalcButtonAdapter());
	}
	class MouseCalcButtonAdapter extends MouseAdapter
	{
		Color color;
		public void mouseEntered(MouseEvent me)
		{
			color=me.getComponent().getBackground();
			setForeground(Color.red);
			setBackground(Color.black);
			setFont(new Font("Courier New",Font.BOLD,12));
		}
		public void mouseExited(MouseEvent me)
		{
			setFont(new Font("Courier New",Font.BOLD,10));
			setForeground(Color.black);
			me.getComponent().setBackground(color);

		}
	}
   }


   class MyFile   //MyFile is inner class
   {
   	private DataOutputStream Of;
   	public void WriteFileOnTextArea()
 	{
          String str;
          char st;
          str="";
      try
      {
        DataInputStream If=new DataInputStream(new FileInputStream("FileOutput.txt"));
        while(If.readLine()!=null)
        {
        	if ((st=If.readChar())!='E')
        	{
          		str=st+str;
          	}
          	if (st=='E')
          	{
          		ta.append(str);
          		ta.append("\n");
          		str="";
          	}
      	}
      	If.close();

      }
    catch(FileNotFoundException e) {}
    catch(IOException e) {}
	}
	public void CreateFile()
	{
 		try
 		{
    	Of=new DataOutputStream(new FileOutputStream("FileOutput.txt"));
    	Of.writeChars("Begin\n");
    	}
    	catch(IOException e) {
    		System.err.println("File not opened properly\n"+e.toString());
            System.exit(1);
    	}
	}
	public void addTofile(String str)
	{
		try
		{
			for(int i=str.length()-1;i>=0;i--)
			{
				Of.writeChar(str.charAt(i));
				Of.writeChars("\n");
			}
			Of.writeChar('E');
			Of.writeChars("\n");
		}
		catch (IOException io){}
	}
	public void delFile()
	{
		 	CreateFile();
			try
			{
				Of.close();
			}
			catch (IOException io){}
	}
	public void endStore()
	{
			try
			{
				Of.close();
			}
			catch (IOException io){}
	}

}

}

class MyMath

{
		public static double msin(double x)
		{
		if (x<=0.0005)
		 x=x+((x*x*x)/6);
		else
		 x=2*msin(x/2)*mcos(x/2);
		return x;
		}
		public static double mcos(double x)
		{
		if (x<=0.0005)
		 x=1-((x*x*x)/2);
		else
		 x=(mcos(x/2)*mcos(x/2))-(msin(x/2)*msin(x/2));
		return x;
	}
		public static double invertt(double x)
		{
//converting from radian to degree 			
			double y;
			y=(180*x)/Math.PI;
			return y;
		}

	public static double invert(double x)
	{
//converting from degree to radian 
		double y;
		y=(Math.PI*x)/180;
		return y;
	}
	public static double mypow(double x,int y)
	{
		double s;
		s=1;
		for(int i=1;i<=y;i++)
			s=s*x;
		return s;
	}

	public static double mysqr(double x)
	{
		double s=x*x;
		return s;
	}

	public static long myX(int x)
//factorial function	
	{
		long t=1;
		for(int i=x;i>0;i--)
			t=i*t;
		return t;
	}

}

 class CloseWindowAndExit  implements WindowListener
{
	public void windowClosing(WindowEvent e)
	{
		System.exit(0);
	}
	public void windowActivated(WindowEvent e){}
	public void windowClosed(WindowEvent e){}
	public void windowDeactivated(WindowEvent e){}
	public void windowDeiconified(WindowEvent e){}
	public void windowIconified(WindowEvent e){}
	public void windowOpened(WindowEvent e){}
}


// end of the  project :
// Programers:(the order was choosen by trusted random function)
//Georg Elias
//Bahaa Morad
//Samer Al_Fakeh
//Bahar Mhasin



///End