can any1 help me please

You need to explain clearly what you mean.

[ok
i make a calculator program which take input form mouse but when i give second input it overrides can u help me pls

no, you're beyond help... :(

You do take care to actually remember what the first input was, do you?
Or more likely you don't but should.

You did not answer iamthwee question...
All depends what you do and also how much usability you give a user. Do you colect only 2 variables or you let user insert as many values us he/she wish including bracklets, square, power etc? You want simple calculator like windows have or you try to created scientific?

he confused me >_<"
add action listener? lol..

I diid all thing but result was the same i m biggner my dear i m sending u the code help if u can

import java.applet.*;
import java.awt.*;
import java.awt.event.*;

public class KCalculator extends Applet implements ActionListener{

    TextField a ,b,c;
    Button info,clear,equa,plus,minus,divide,mult;
    Button zerow,one,two,three,four,five,six,seven;
    Button eight,nine,point;
    String msg="";
    public void init()
    {
        a=new TextField (12);
        b=new TextField (12);
        c=new TextField (12);
        plus = new Button( "+" );
        minus = new Button( "-" );
        mult = new Button( "*" );
        divide = new Button( "/" );
        zerow = new Button( "0" );
        one = new Button( "1" );
        two = new Button( "2" );
        three = new Button( "3" );
        four = new Button( "4" );
        five = new Button( "5" );
        six = new Button( "6" );
        seven = new Button( "7" );
        eight = new Button( "8" );
        nine = new Button( "9" );

        add( a );
        add( b );
        add( c );
        add( one );
        add( two );
        add( three );
        add( four );
        add( five );
        add( six );
        add( seven );
        add( eight );
        add( nine );
        add( zerow );
        add( plus );
        add( minus );
        add( mult );
        add( divide );

        a.addActionListener(this);
        b.addActionListener(this);
        c.addActionListener(this);
        plus.addActionListener(this);
        minus.addActionListener(this);
        mult.addActionListener(this);
        divide.addActionListener(this);
        zerow.addActionListener(this);
        one.addActionListener(this);
        two.addActionListener(this);
        three.addActionListener(this);
        four.addActionListener(this);
        five.addActionListener(this);
        six.addActionListener(this);
        seven.addActionListener(this);
        eight.addActionListener(this);
        nine.addActionListener(this);
  }


  public void actionPerformed(ActionEvent ae) {
   String str = ae.getActionCommand();
    if(str.equals("0")) {
       a.setText((String) str);
    }else if(str.equals("1")) {
       a.setText((String) str);
    }else if(str.equals("2")) {
       b.setText((String) str);
    }else if(str.equals("3")) {
       a.setText((String) str);
    }else if(str.equals("4")) {
       b.setText((String) str);
    }else if(str.equals("5")) {
       a.setText((String) str);
    }else if(str.equals("6")) {
       b.setText((String) str);
    }else if(str.equals("7")) {
       a.setText((String) str);
    }else if(str.equals("8")) {
       b.setText((String) str);
    }else if(str.equals("9")) {
       a.setText((String) str);
    }else  {
    c.setText((String) str);
    }



 }

}