Java Collections emptyList() Method with Examples

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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)