arraylist container one of element java code example

Example 1: javascript element in array

var fruits = ["Banana", "Orange", "Apple", "Mango"];

var n = fruits.includes("Mango");

Example 2: how to push an element in hashset java

HashSet<Integer> set=new HashSet<>();
//adding a new element
set.add(10);

Example 3: java replace element in list

list.set(4, "element at index 4 is replaced by this string");