Different ways to iterate LinkedHashSet in Java

1. Using Iterator –

import java.util.Iterator;
import java.util.LinkedHashSet;
import java.util.Set;

public class IterateLinkedHashSet {
	public static void main(String[] args) {
		Set<String> linkedHashSetObj = new LinkedHashSet();
		linkedHashSetObj.add("ram");
		linkedHashSetObj.add("mohan");
		linkedHashSetObj.add("sohan");
		linkedHashSetObj.add("ram");
		linkedHashSetObj.add("ram");

		Iterator<String> it = linkedHashSetObj.iterator();

		while (it.hasNext()) {
			System.out.println(it.next());
		}
	}
}

Output is –

ram
mohan
sohan

2. Using for-each loop –

import java.util.LinkedHashSet;
import java.util.Set;

public class IteratingLinkedHashSet2 {
	public static void main(String[] args) {
		Set<String> linkedHashSetObj = new LinkedHashSet();
		linkedHashSetObj.add("ram");
		linkedHashSetObj.add("mohan");
		linkedHashSetObj.add("sohan");
		linkedHashSetObj.add("ram");
		linkedHashSetObj.add("ram");
		for (String str : linkedHashSetObj) {
			System.out.println(str);
		}
	}
}

Output is –

ram
mohan
sohan

We can’t iterate LinkedHashSet using Listiterator, Enumeration and normal for loop(as we don’t have get() method in LinkedHashSet like ArrayList).

• Collection interview questions.