Java Collections emptyList() Method with Examples

Last Updated : 13 Jan, 2022

The emptyList() method of Java Collections returns the list with no elements. This method is immutable. That is, we can not do any modifications after creating this method.

Syntax:

public static final <T> List<T> emptyList()

Parameters: It will not accept any parameters

Return: This method will return an empty list

Example 1:

Java

// Java program to create an empty list import java.util.*; public class GFG {  public static void main(String[] args)  {  // create a list that is empty  List<String> mylist  = Collections.<String>emptyList();    // display the list  System.out.println(mylist);  } }

Output

[]

Example 2:

Java

// Java program to show an exception // when adding the elements to the list import java.util.*; public class GFG {  public static void main(String[] args)  {  // create a list that is empty  List<Integer> mylist  = Collections.<Integer>emptyList();  // add 5 elements to the created list  mylist.add(1);  mylist.add(2);  mylist.add(3);  mylist.add(4);  mylist.add(5);  // display the list  System.out.println(mylist);  } }

Output:

Exception in thread "main" java.lang.UnsupportedOperationException at java.util.AbstractList.add(AbstractList.java:148) at java.util.AbstractList.add(AbstractList.java:108) at GFG.main(GFG.java:11)