All you need to know is that Set doesn't allow duplicates in Java. Which means if you have added an element into Set and trying to insert duplicate element again, it will not be allowed. In Java, you ...

Write a method that takes a String array argument and returns the array back with all duplicates removed NOTE: the order of elements returned is not an issue ...

Dedupe with a Java HashSet. Sometimes a HashSet is better than a List. A Java List can contain duplicate entries, as shown in the prior example. However, every item in a HashSet must be unique. If you ...