Applet and Application not running - help!

[federico elbl]

I'm trying to run this program both as an applet and an application, but I'm getting the following error when I try to compile it:

/tmp/18006/calculator.java:10: calculator should be declared abstract; it does not define actionPerformed(java.awt.event.ActionEvent) in calculator
public class calculator extends Applet implements 
       ^
Note: /tmp/18006/calculator.java uses or overrides a deprecated API.
Note: Recompile with -deprecation for details.
1 error

How can I fix this? Below is the code for my program.
-Maria

// import packges
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.applet.*;
public class calculator extends Applet implements 
ActionListener{
    
// declare varibles
TextField display;
    public final int OPNONE = 0;
    public final int OPSUM = 1;
    public final int OPMINUS = 2;
    public final int OPMULT = 3;
    public final int OPDIV = 4;
    public final int OPEQUAL = 5;
    public final int OPCLEAR_C = 6;
    public final int OPCLEAR_AC = 7;
    public final int DECEMAL = -1;
    public final int OPFACT = 8;
    public final int OPSQUARE = 9;
    public final int OPSIN = 10;
    public final int OPCOS = 11;
    public final int OPTAN = 12;
    public final int OPEXP = 13;
    public final int OPLOG = 14;
    public final int OPSQRT = 15;
    public final int OPCUBE = 16;
    public final int OPPOW = 17;
    public final int OPPI = 18;
    String cadDecemal;
    int Operator = OPNONE;
    boolean newnumber = true;
    boolean isDecemal = false;
    double Total = 0.0;
    boolean isConstant = false;
    double numConstant = 0.0;
    int opConstant = OPNONE;
        
public void init() {
calcButton 
but0,but1,but2,but3,but4,but5,but6,but7,but8,but9;
        calcButton butDecemal,butSuma,butMinus;
        calcButton 
butMult,butDiv,butEqual,butClearC,butClearAC,butFact;
        calcButton butSquare,butSen,butCos;
        calcButton butTan,butExp,butLog,butSqrt;
        calcButton butCube,butPot,butPi;
        
//set up GUI
setLayout( null );
        setFont( new Font( "Times Roman",Font.PLAIN,14 ) );
        setBackground( new Color( 0x90,0xa4,0xb4 ) );
        
//create buttons
but0 = new calcButton( "0",OPNONE,0 );
        add( but0 );
        but0.reshape( 8,144,95,24 );
        but0.addActionListener( this );
but1 = new calcButton( "1",OPNONE,1 );
        add( but1 );
        but1.reshape( 8,112,40,24 );
        but1.addActionListener( this );
but2 = new calcButton( "2",OPNONE,2 );
        add( but2 );
        but2.reshape( 64,112,40,24 );
        but2.addActionListener( this );
but3 = new calcButton( "3",OPNONE,3 );
        add( but3 );
        but3.reshape( 120,112,40,24 );
        but3.addActionListener( this );
but4 = new calcButton( "4",OPNONE,4 );
        add( but4 );
        but4.reshape( 8,80,40,24 );
        but4.addActionListener( this );
but5 = new calcButton( "5",OPNONE,5 );
        add( but5 );
        but5.reshape( 64,80,40,24 );
        but5.addActionListener( this );
but6 = new calcButton( "6",OPNONE,6 );
        add( but6 );
        but6.reshape( 120,80,40,24 );
        but6.addActionListener( this );
but7 = new calcButton( "7",OPNONE,7 );
        add( but7 );
        but7.reshape( 8,48,40,24 );
        but7.addActionListener( this );
but8 = new calcButton( "8",OPNONE,8 );
        add( but8 );
        but8.reshape( 64,48,40,24 );
        but8.addActionListener( this );
but9 = new calcButton( "9",OPNONE,9 );
        add( but9 );
        but9.reshape( 120,48,40,24 );
        but9.addActionListener( this );
butDecemal = new calcButton( "�",OPNONE,DECEMAL );
        add( butDecemal );
        butDecemal.reshape( 120,144,40,24 );
        butDecemal.addActionListener( this );
butSuma = new calcButton( "+",OPSUM,0 );
        add( butSuma );
        butSuma.reshape( 176,112,40,24 );
        butSuma.addActionListener( this );
butMinus = new calcButton( "-",OPMINUS,0 );
        add( butMinus );
        butMinus.reshape( 232,112,40,24 );
        butMinus.addActionListener( this );
butMult = new calcButton( "x",OPMULT,0 );
        add( butMult );
        butMult.reshape( 176,80,40,24 );
        butMult.addActionListener( this );
butDiv = new calcButton( "/",OPDIV, 0);
        add( butDiv );
        butDiv.reshape( 176,48,40,24 );
        butDiv.addActionListener( this );
butEqual = new calcButton( "=",OPEQUAL,0 );
        add( butEqual );
        butEqual.reshape( 176,144,95,24 );
        butEqual.addActionListener( this );
butClearC = new calcButton( "C",OPCLEAR_C,0 );
        add( butClearC );
        butClearC.reshape( 232,48,40,24 );
        butClearC.addActionListener( this );
butClearAC = new calcButton( "AC",OPCLEAR_AC,0 );
        add( butClearAC );
        butClearAC.reshape( 232,80,40,24 );
        butClearAC.addActionListener( this );
butFact = new calcButton( "n!",OPFACT,0);
        add(butFact);
        butFact.reshape(300,80,40,24);
        butFact.addActionListener( this );
butSquare = new calcButton( "X^2",OPSQUARE,0);
        add(butSquare);
        butSquare.reshape(300,112,40,24);
butSquare.addActionListener( this );
        butSen = new calcButton( "Sin",OPSIN,0);
        add(butSen);
        butSen.reshape(300,48,40,24);
        butSen.addActionListener( this );
butCos = new calcButton( "Cos",OPCOS,0);
        add(butCos);
        butCos.reshape(300,144,40,24);
        butCos.addActionListener( this );
butTan = new calcButton( "Tan",OPTAN,0);
        add(butTan);
        butTan.reshape(350,144,40,24);
butTan.addActionListener( this );
        butExp = new calcButton( "Exp",OPEXP,0);
        add(butExp);
        butExp.reshape(350,48,40,24);
        butExp.addActionListener( this );
butLog = new calcButton( "Log",OPLOG,0);
        add(butLog);
        butLog.reshape(350,112,40,24);
        butLog.addActionListener( this );
butSqrt = new calcButton( "Sqrt",OPSQRT,0);
        add(butSqrt);
        butSqrt.reshape(350,80,40,24);
        butSqrt.addActionListener( this );
butCube = new calcButton( "X^3",OPCUBE,0);
        add(butCube);
        butCube.addActionListener( this );
butCube.reshape(400,80,40,24);
butCube.addActionListener( this );
        butPot = new calcButton( "X^Y",OPPOW,0);
add(butPot);
        butPot.reshape(400,112,40,24);
        butPot.addActionListener( this );
butPi = new calcButton( "PI",OPPI,0);
        add(butPi);
        butPi.reshape(400,48,40,24);
        butPi.addActionListener( this );;
        //display
        display = new TextField( "0",80 );
        display.setEditable( false );
        add( display );
        display.reshape( 48,8,184,31 );
        String aDecemal = ( new Double(0.1) ).toString();
        cadDecemal = aDecemal.substring( 
aDecemal.length()-2 ).substring( 0,1 );
}
    
//execute applet as application
    public static void main( String args[] ) {
        //applet window
JFrame f = new JFrame( "Sientific Calculator by Maria Re" 
);
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

//applet instance
calculator c = new calculator();
        
//init and start methods
c.init();
        c.start();

//center applet
f.getContentPane().add( c );
        f.setResizable(false);
     f.setSize(470,210);
    f.setVisible( true );
        }// end main
  
  
  public void anadir( int value ) {
        String digit;
        if( value == DECEMAL )
            if( !isDecemal )
                {
                if( newnumber )
                    {
                    display.setText( "0" );
                    newnumber = false;
                    }
                isDecemal = true;
                digit = cadDecemal;
                }
            else
                return; 
        else
            digit = ( new Integer(value) ).toString();

        if( newnumber )
            {
            display.setText( digit );
            if( value != 0 )
                newnumber = false;
            }
        else
            display.setText( display.getText() + digit );
        repaint();
        }
    //operations
public void makesOperation( int newOperator ) {
        double number;
        number = ( new Double( display.getText() ) 
).doubleValue();
        switch( newOperator )
            {
            case OPSUM:
            case OPMINUS:
            case OPMULT:
            case OPDIV:
            case OPFACT:
            case OPSQUARE:
            case OPSIN:
            case OPCOS:
            case OPTAN:
            case OPEXP:
            case OPLOG:
            case OPSQRT:
            case OPCUBE:
            case OPPOW:
            case OPPI:
                if( newnumber )
                    {
                    if( newOperator == Operator && 
!isConstant )
                        {
                        isConstant = true;
                        numConstant = number;
                        opConstant = newOperator;
                        }
                    else
                        isConstant = false;
                    }
                else
                    isConstant = false;
            case OPEQUAL:
                if( !newnumber || isOperatorEqual( 
newOperator ) )
                    {
                    if( isConstant )
                        {
                        Total = numConstant;
                        Operator = opConstant;
                        }
                    switch( Operator )
                        {
                        case OPSUM:
                            Total = Total + number;
                            break;
                            
                        case OPMINUS:
                            Total = Total - number;
                            break;
                            
                        case OPMULT:
                            Total = Total * number;
                            break;
                            
                        case OPDIV:
                            Total = Total / number;
                            break;
                            
                        case OPFACT:
                             {
                              class Factorial
  {
   //This is a recursive function
   double fact (double n)
    {
     double risult;
if (n==1)
        return 1;
     risult = fact(n-1)*n;
     return risult;
     }
   }                                                                                                                         
                               Factorial f = new 
Factorial();
   Total = f.fact(number);                                                             
  }             
                        break;
                        
                        case OPSQUARE:
                             Total = number * number;
                             break;
                        
                        case OPSIN:
                           Total=Math.sin(number); 
                             break;
                             
                        case OPCOS:
                             Total = Math.cos(number);
                             break;
                             
                        case OPTAN:
                             Total = Math.tan(number);
                             break;
                             
                        case OPEXP:
                             Total = Math.exp(number);
                             break;
                             
                        case OPLOG:
                             Total = Math.log(number);
                             break;
                             
                        case OPSQRT:
                             Total = Math.sqrt(number);
                             break;
                             
                        case OPCUBE:
                             Total = (number * number) * 
number;
                             break;
                             
                        case OPPOW:
                             Total = Math.pow(number, 
number);
                             break;
                             
                        case OPPI:
                             Total = 3.14159265;
                             break;
                        case OPEQUAL:
                        case OPNONE:
                            Total = number;
                            break;
                        }
                    display.setText(( new Double(Total) 
).toString());
                    }
                Operator = newOperator;
                newnumber = true;
                isDecemal = false;
                break;
            }
        switch( newOperator )
            {
            case OPCLEAR_C:
                number = 0.0;
                display.setText( "0" );
                if( isOperatorEqual( Operator ) )
                    Total = number;
                newnumber = true;
                isDecemal = false;
                break;
            case OPCLEAR_AC:
                display.setText( "0" );
                Operator = OPNONE;
                newnumber = true;
                isDecemal = false;
                Total = 0.0;
                isConstant = false;
                break;
            }
        }
    private boolean isOperatorEqual( int oper ) {
        return( oper == OPEQUAL );
        }
    }

class calcButton extends Button {
    int Operator;
    int bvalue;
    calcButton( String texto, int oper, int value ) {
        super( texto );
        Operator = oper;
        bvalue = value;   
        }
    public boolean action( Event evt, Object arg ) {
        calculator par = ( calculator )getParent();
        if( Operator == par.OPNONE )
            par.anadir( bvalue );
        else
            par.makesOperation( Operator );
        return( true );
        }
}

[Brian Pipa]

public class calculator extends Applet implements ActionListener{

You say your class implements ActionListener, but you don't have the actionPerformed method. Either add an actionPerformed method to your class or remove "implements ActionListener" from your code
From looking at your code, it look slike you do want an ActionListener, so add the actionPerformed method (see the Javadocs for ActionListsener for more info/details)
Brian