How to convert ArrayList to Array and Array to ArrayList in java?

Answer 1

convert ArrayList to Array and Array to ArrayList in Java:

public class LengthVsSizeArrayList {  
    public static void main(String[] args) {  
        //creating Arraylist  
        List<String> fruitList = new ArrayList<>();  
        //adding String Objects to fruitsList ArrayList  
        fruitList.add("Mango");  
        fruitList.add("Banana");  
        fruitList.add("Apple");  
        fruitList.add("Strawberry");  
        fruitList.add("Pineapple");  
        System.out.println("Converting ArrayList to Array" );  
        String[] item = fruitList.toArray(new String[fruitList.size()]);  
        for(String s : item){  
            System.out.println(s);  
        }  
        System.out.println("Converting Array to ArrayList" );  
        List<String>l2 = new ArrayList<>();  
        l2 =  Arrays.asList(item);  
        System.out.println(l2);  
    }  
}  

Output:

Converting ArrayList to Array
Mango
Banana
Apple
Strawberry
Pineapple
Converting Array to ArrayList
[Mango, Banana, Apple, Strawberry, Pineapple]