calculating totals in an applet

[jackie white]

I'm new to all this and being the only girl in class, I get so frustrated because I can't get this to work right. All I want to do is use checkbox, say for 5 of them and total them up here is my code can some one help me?
import java.awt.*;
import java.applet.*;
import java.awt.event.*;

public class PetClinicApplet extends Applet implements ItemListener, ActionListener
{
//Create components for applet
Label companyNameLabel = new Label(" LIONS, TIGERS, AND BEARS ");
Label welcomeLabel = new Label(" Welcome! ");
Label variousServiceLabel = new Label(" Please check services being used. ");
Checkbox officeVisitBox = new Checkbox("Office Visits ");
Checkbox hospitalBox = new Checkbox("Hospitalization ");
Checkbox vaccinBox = new Checkbox( "Vaccinations ");
Checkbox boardBox = new Checkbox("Boarding ");
Checkbox dentistBox = new Checkbox("Denistry ");
Checkbox xrayBox = new Checkbox("X-rays ");
Checkbox labBox = new Checkbox("Laboratory Work ");
Checkbox heartwormPrevBox = new Checkbox("Heartworm Prevention");
Checkbox prescripBox = new Checkbox("Prescriptions ");
Label outputLabel = new Label();
Label outputLabel1 = new Label();
Button calcButton = new Button("Calculate Totals");


public void init()
{
//Add components to window and set colors
setBackground(Color.gray);
setForeground(Color.black);
add(companyNameLabel);
add(welcomeLabel);
add(variousServiceLabel);
add(officeVisitBox);
officeVisitBox.addItemListener(this);
add(hospitalBox);
hospitalBox.addItemListener(this);
add(vaccinBox);
vaccinBox.addItemListener(this);
add(boardBox);
boardBox.addItemListener(this);
add(dentistBox);
dentistBox.addItemListener(this);
add(xrayBox);
xrayBox.addItemListener(this);
add(labBox);
labBox.addItemListener(this);
add(heartwormPrevBox);
heartwormPrevBox.addItemListener(this);
add(prescripBox);
prescripBox.addItemListener(this);
add(calcButton);
calcButton.addActionListener(this);
add(outputLabel);
add(outputLabel1);

//Assigning Values
int officeVisitBox = 35;
int hospitalBox = 75;
int vaccinBox = 25;
int boardBox = 15;
int dentistBox = 25;
int xrayBox = 12;
int labBox = 20;
int heartwormPrevBox = 12;
int prescripBox = 9;

}
public void itemStateChanged(ItemEvent choice)
{

int total;
total =
//Display Output
outputLabel1.setText("The total amount is $" + (total));
outputLabel.setForeground(Color.black);

}
public void actionPerformed(ActionEvent e)
{


}




}

[Manfred Leonhardt]

Jackie,
I would not use a button because the ItemStateChanged should be enough to do it. Here is one way you could make it work.

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

public class PetClinicApplet extends Applet implements ItemListener
{
//Create components for applet
int totalValue = 0;
String officeVisitStr = "Office Visits";
String hospitalStr = "Hospitalization";
String vaccinStr = "Vaccinations";
String boardStr = "Boarding";
String dentistStr = "Denistry";
String xrayStr = "X-rays";
String labStr = "Laboratory Work";
String heartwormPrevStr = "Heartworm Prevention";
String prescripStr = "Prescriptions";
Checkbox officeVisitBox = new Checkbox( officeVisitStr );
Checkbox hospitalBox = new Checkbox( hospitalStr );
Checkbox vaccinBox = new Checkbox( vaccinStr );
Checkbox boardBox = new Checkbox( boardStr );
Checkbox dentistBox = new Checkbox( dentistStr );
Checkbox xrayBox = new Checkbox( xrayStr );
Checkbox labBox = new Checkbox( labStr );
Checkbox heartwormPrevBox = new Checkbox( heartwormPrevStr );
Checkbox prescripBox = new Checkbox( prescripStr ); 
Label outputLabel1;
Label outputLabel;
public void init()
{
//Add components to window and set colors
setBackground(Color.gray);
setForeground(Color.black);
add( new Label(" LIONS, TIGERS, AND BEARS ") );
add( new Label(" Welcome! ") );
add( new Label(" Please check services being used. ") );

add(officeVisitBox);
officeVisitBox.addItemListener(this);
add(hospitalBox);
hospitalBox.addItemListener(this);
add(vaccinBox);
vaccinBox.addItemListener(this);
add(boardBox);
boardBox.addItemListener(this);
add(dentistBox);
dentistBox.addItemListener(this);
add(xrayBox);
xrayBox.addItemListener(this);
add(labBox);
labBox.addItemListener(this);
add(heartwormPrevBox);
heartwormPrevBox.addItemListener(this);
add(prescripBox);
prescripBox.addItemListener(this);
outputLabel = new Label( "Total amount is $" );
add( outputLabel );
// Start out with something here to avoid resizing issues.
outputLabel1 = new Label( "  0" );
add( outputLabel1 );
}
private int getBoxValue( String boxLabel )
{
if( boxLabel.equals( officeVisitStr ) ) {
return( 35 );
} else if( boxLabel.equals( hospitalStr ) ) {
return( 75 );
} else if( boxLabel.equals( vaccinStr ) ) {
return( 25 );
} else if( boxLabel.equals( boardStr ) ) {
return( 15 );
} else if( boxLabel.equals( dentistStr ) ) {
return( 25 );
} else if( boxLabel.equals( xrayStr ) ) {
return( 12 );
} else if( boxLabel.equals( labStr ) ) {
return( 20 );
} else if( boxLabel.equals( heartwormPrevStr ) ) {
return( 12 );
} else if( boxLabel.equals( prescripStr ) ) {
return( 9 );
}
return( 0 );
}
public void itemStateChanged(ItemEvent choice)
{ 
// Here we will just add up the values.
if( choice.getStateChange() == ItemEvent.SELECTED ) {
totalValue += getBoxValue( ((Checkbox)choice.getItemSelectable()).getLabel() );
} else {
totalValue -= getBoxValue( ((Checkbox)choice.getItemSelectable()).getLabel() );
}
outputLabel1.setText( "" + totalValue );
}
}

Regards,
Manfred.