Question

I have a class

public class ABC {
    public int i;
    public float f;

    public ABC(int d1,float d2) {
        i=d1;
        f=d2;
    }
}

I have created a ArrayList of ABC object .

    ArrayList<ABC> list = new ArrayList<ABC>();
    ABC abc1=new ABC(1,1.0f);
    ABC abc2=new ABC(2,2.0f);
    list.add(abc1);
    list.add(abc2);

Now I want to convert the ArrayList into array with toArray() method, but this Method returns Object[];.

Now I can typecast elements of Object[] one by one into ABC type object and create ABC[];,

but Is there any other way to typecast the Object[] into ABC[] in one command ? Something like this

    ABC[] array=(ABC[])list.toArray();

though this command throws this exception

Exception in thread “main” java.lang.ClassCastException: [Ljava.lang.Object; can not be cast to [LABC;**

Any Help

Answer 1

The List interface has a toArray method that returns the generically-typed array, so you can useArrayList's implementation of that:

ABC[] array = new ABC [list.size()]
array = list.toArray(array);