Thread: bluej some questions about a simple car details class

Hallo ,
this is a class in bluej about car details i created
the problems so far in the class are that it allows any number in the transmition when i go to create the class , it should only allow 1 and 2(i dont really need to do it , but i am asking if there is a way around it ) and also in the toString method to show the manual and automatic and not 1 and 2 in the type

thanks for all the help

public class Car 
{
 
  // set up the two constants for the transmition 
  public static final int manual = 1;
  public static final int automatic = 2;
  // instance variables - replace the example below with your own
    private static  int  engineSize;
    private int  fuel;
    private final int type ;
 
     /**
     * Constructor for objects of class Car
     */
    public Car(int newFuel , int newEngineSize , int Trans  ) {
       fuel = newFuel;
       engineSize = newEngineSize;
       type = Trans;
        }
     /**
     Change the fuel 
     */
 
    public void getFuel()
    {
     System.out.println("The fuel of this car is " + fuel  );
    }
 
    public void getEngineSize()
    {
    System.out.println("The engineSize of this car is " +  engineSize);    
    }
 
    public  void setFuel( int newfuel)
    {
    fuel = newfuel;
    }
 
    public String getTypeAsString (){
		if (type == automatic){
			return "automatic";
		}
		else if (type == manual){
			return "manual";
		}
		return "";
	}
 
 
    public String toString(){
      return ("fuel "  + fuel + " Engine Size " + engineSize + " Transmition  " + type ) ;
 
    }
 }

You can validate the data when it is received in the constructor and throw an exception if the data is invalid. Many java classes do that. See the Integer class for an example.
You would need to add a throws clause to the constructor's definition.

The doc for all the java SE classes:
Java Platform SE 6
Find the class in the lower left, click it and the doc will show in the main frame.