how to typecast arrays of Objects into array of specialized objects

[Aruna Agrawal]

How do i typcast array of Object into array of Fruit when i know that array of Object contains Fruit Objects. Please help its very urgent for me as i have submit a code

 
class Fruit {
public String getName() {
return "Orange";
}
}
public class ArrayTypeCasting {
public static void main(String[] args) {
Object[] oArray = { new Fruit() };
Fruit[] oFruitArray = (Fruit[]) oArray;
System.out.println("Fruit is " + oFruitArray[0].getName());
}
}

Exception in thread "main" java.lang.ClassCastException: [Ljava.lang.Object;
at ArrayTypeCasting.main(ArrayTypeCasting.java:23)

[Barry Gaunt]

Please do not post in multiple forums. This one remains, SCJP one deleted.

[Igor Stojanovic]

Hi Aruna,

class Ananas {
      public String getName() {
 
        return "Ananas";
     }
}
 
class Orange{
       public String getName(){
                return "Orange";
       }
}
public class Casting {
       public static void main(String[] args) {
 
              Object[] oArray = { new Ananas() };
              Object[] oOrangeArray = {new Orange()};
 
              System.out.println("In oArray we have:"+((Ananas)oArray[0]).getName());
              System.out.println("In Orange array we have:"+((Orange)oOrangeArray[0]).getName());
 
       }
}  

kind regards
Igor

[Barry Gaunt]

What you have assigned to oArray is not an array of Fruit references, it is an array of Object references that contains a reference to a Fruit.
Here's my go at correcting your problem:

public class ArrayTypeCasting {
    public static void main(String[] args) {
 
//      Object[] oArray = { new Fruit() }; // the righthandside is not a Fruit[], it's an Object[]
 
        Object[] oArray = new Fruit[]{new Fruit()}; // Better now ?
        Fruit[] oFruitArray = (Fruit[]) oArray;
        System.out.println("Fruit is " + oFruitArray[0].getName());
    }
}

[Aruna Agrawal]

thanks Igor and special thanks to Barry for solving my problem. Also sorry Barry for posting in 2 forms.. i will not post twice