Need Help With Exceptions

[maggie_2]

Please help,

I am working on this project for school, what I am trying to do is create an exception class whose constructor receives a String that consists of an ice cream cone's flavor and a integer representing the number of scoops in the IceCreamCone. Also, I am trying to create an IceCreamCone class with two fields-flavor and scoops. I need the IceCreamCone constructor to call data entry methods - setFlavor() and setScoops(). I need the setScoops() method to throw an IceCreamConeException when the scoops exceed 3. Any help would be greatly appreciated.

public class IceCreamConeException extends Exception
{

  public IceCreamConeException()
  {

    flav = iceCreamFlavor;
    scoops = nubmerOfScoops;
  } 


}








import javax.swing.*;

 public class IceCreamCone
 {

   
   private String flavor; 
   private int scoops;
 }

 public IceCreamCone()
 {

   setFlavor();
   setScoops();

 }

 public void setScoops() throws IceCeamConeException
 {

    if(scoops > 3;)
      throw(new IceCreamConeException());

 }


}

[emceenugget]

Exceptions need to be caught (or re-thrown) by methods calling the original method to throw the Exception.

[maggie_2]

I made some modifications to my original files, I can now compile the IceCreamConeException file, however I am still having trouble with the IceCreamCone file. When I try to compile I get only 1 error, the system complains that in line 29: " throws (new IceCreamConeException()); " is an illegal start of expression. Any suggestions would be greatly appreciated.

public class IceCreamConeException extends Exception
{

  public IceCreamConeException(String scoops)
  {

    super(scoops);
  } 


}









import javax.swing.*;

  public class IceCreamCone
  {

    
    String flavor,inputString; 
    int scoops;
  
 

 
  public IceCreamCone() throws IceCreamConeException
  {

    setFlavor();
    setScoops();

  }

  
  void setScoops() throws IceCreamConeException
  {
     flavor = JOptionPane.showInputDialog(null, " What flavor would you like? " );
     inputString = JOptionPane.showInputDialog(null, " How many scoops would you like in your cone? ");
       scoops = Integer.parseInt(inputString);

     if(scoops > 3)
       throws (new IceCreamConeException());
  }



  

 
 


}

[jeffj60]

I am not sure if you've discovered the answer yet.

Instead of throws (new IceCreamConeException());
use throw (new IceCreamConeException());

Throws is used on a method declaration.
Also, your constructor requires a parameter.
You will receive another error once you fix this unless
you pass a parameter or remove the parameter from
your Exception Constructor.

ie. you need to use throws (new IceCreamConeException(String.valueOf(scoops)));
for your code to compile.

[jeffj60]

Sorry, you need to use throw (new IceCreamConeException(String.valueOf(scoops)));
for your code to compile. (not throws)

[angelicsign]

i use try and catch to complete your coding, hope this will help u up.

  void setScoops()
  {
    try{
     flavor = JOptionPane.showInputDialog(null, " What flavor would you like? " );
     inputString = JOptionPane.showInputDialog(null, " How many scoops would you like in your cone? ");
       scoops = Integer.parseInt(inputString);

     if(scoops > 3)
       throw new IceCreamConeException("Cannot more than 3 scoops");
   }
   	catch(IceCreamConeException es)
   	{
   		System.out.println(es.getMessage());
   	}

  }