How to create an Empty List in Java

How to create an Empty List in Java ?

Answer

To create an empty list in Java, you can use the Collections.emptyList method for an immutable list or the new ArrayList() constructor for a mutable list.

✐ Examples

1 Create an Empty Immutable List

In this example,

We use the Collections.emptyList method to create an empty immutable list of type String.
The emptyList method returns an empty list.
We print the list to the console to verify it is empty.

Java Program

import java.util.Collections;
import java.util.List;

public class Main {
    public static void main(String[] args) {
        List<String> emptyList = Collections.emptyList();
        System.out.println("Empty list: " + emptyList);
    }
}

Output

Empty list: []

2 Create an Empty Mutable List

In this example,

We use the new ArrayList() constructor to create an empty mutable list of type Integer.
The new ArrayList() constructor returns an empty mutable list.
We print the list to the console to verify it is empty.

Java Program

import java.util.ArrayList;
import java.util.List;

public class Main {
    public static void main(String[] args) {
        List<Integer> emptyMutableList = new ArrayList<>();
        System.out.println("Empty mutable list: " + emptyMutableList);
    }
}

Output

Empty mutable list: []

Summary

In this tutorial, we learned How to create an Empty List in Java language with well detailed examples.

◀ Previous Next ▶

Java Tutorials

Java How-Tos

How to create an Empty List in Java

How to create an Empty List in Java ?

Answer

✐ Examples

1 Create an Empty Immutable List

Java Program

Output

2 Create an Empty Mutable List

Java Program

Output

Summary

More Java Lists Tutorials