Removing Duplicates from the List object using Set Object

on October 31, 2016

Post Views: 1,207

Removing List Duplicates using Set Object

In this tutorial, I am sharing simple program about Removing List Duplicates using Set Object. The java example program was tested and output is shared in the same post.

RemoveDuplicateList.java

package com.dineshkrish;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;
import java.util.TreeSet;
public class RemoveDuplicateList {
public static void main(String[] args) {
// Defining Array List Object
List<Integer> numberList = new ArrayList<Integer>();
numberList.add(1);
numberList.add(2);
numberList.add(2);
numberList.add(3);
numberList.add(4);
numberList.add(4);
numberList.add(4);
numberList.add(1);
numberList.add(6);
numberList.add(6);
System.out.println("Before Removing Duplications in the List");
System.out.println("----------------------------------------");
System.out.println(numberList);
// Defining Set Object
Set<Integer> set = new TreeSet<Integer>(numberList);
System.out.println("\nAfter Removing Duplications in the List");
System.out.println("------------------------------------------");
System.out.println(set);
}
}