Create an array of ArrayList elements

Question

I want to create an array that contains ArrayList elements.

I\'ve tried

ArrayList name[] = new ArrayList()[];
         


        

Answer 1

If you do want an array of ArrayList, you'll have to initialise each position of the array individually:

int size = 9; // 9 is just an example
// you can remove the annotation, but you'll be warned:
// Type safety: The expression of type ArrayList[] needs unchecked conversion 
// to conform to ArrayList[]
@SuppressWarnings("unchecked")
ArrayList name[] = new ArrayList[ size];
for( int i = 0; i < size; i++) {
    name[ i] = new ArrayList();
}