Java Array of ArrayList, ArrayList of Array With Examples

Today we will learn how to create a Java array of ArrayList. We will also learn how to create an ArrayList of array elements.

Java Array of ArrayList

java-array-of-arraylist

Creating array of list in java is not complex. Below is a simple program showing java Array of ArrayList example.

Notice that we can’t use generics while creating the array because java doesn’t support generic array. So if we try to use below code, it will produce compile time error as “Cannot create a generic array of List<String>”.

Java ArrayList of Array

We can also create an array whose elements are a list. Below is a simple example showing how to create a list of array elements in java.

Java ArrayList of Object Array

If you are not sure about the type of objects in the array or you want to create an ArrayList of arrays that can hold multiple types, then you can create an ArrayList of an object array.

Below is a simple example showing how to create ArrayList of object arrays in java.

When we execute the above program, it produces the following output.

That’s all for creating an Array of ArrayList and ArrayList of Array in Java.

Reference: Java Arrays

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