27. Remove duplicate value from ArrayList - prabhatrocks07/Core-Java-Programming GitHub Wiki

public class RemDupFromList {

public static void main(String[] args) {
	List<String> list = new  ArrayList<String>();
	list.add("one");
	list.add("two");
	list.add("three");
	list.add("four");
	list.add("one");
	list.add("one");
	
	//We have facility to pass List into Set constructor and vice versa to cast
	//List<String> list1 = new ArrayList<String>(new HashSet<>(list));
	
	//If you need to preserve the order use 'LinkedHashSet'
	List<String> list1 = new ArrayList<String>(new LinkedHashSet<>(list));
	
	Iterator<String> it = list1.iterator();
	while (it.hasNext()) {
		System.out.println(it.next());
		
	}	
}
}