Introduction Removes duplicates from String will remove duplicate characters (if any) from String using Java programming language. For example, let’s say we have a string roytuts and we want to remove duplicates from this string. So in this string the duplicate character is t. Therefore after removing duplicate characters we will get the final string roytus.

Introduction Here in this example I am going to show you how to add unique objects in Java HashSet. Set interface in Java maintains uniqueness, so any duplicacy is not allowed in Set interface. The HashSet class maintains uniqueness through HashMap, so HashSet uses internally HashMap to determine unique elements. When you add String type data or any primitive type…