CODE EXAMPLE FOR JAVA

Program to remove duplicates in an ArrayList

import java.util.ArrayList;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Set;

public class ArrayDuplicate {
    public static void main(String args[]) {

List<Integer> num = new ArrayList<Integer>();
num.add(1);
num.add(2);
num.add(3);
num.add(4);
num.add(5);
num.add(6);
num.add(3);
num.add(4);
num.add(5);
num.add(6);

System.out.println("Your list of elements in ArrayList : " + num);
Set<Integer> primesWithoutDuplicates = new LinkedHashSet<Integer>(num);
num.clear();
num.addAll(primesWithoutDuplicates);
System.out.println("list of original numbers without duplication: " + num);

}
}