Create the Immutable ArrayList with List.of() Method Example

In this example, we will see how to create the Immutable ArrayList with Java 9 List.of() method example.

Create the Immutable List Example - Java 9 List.of() Method

Let's use List.of() static factory methods to create immutable lists.
package net.javaguides.corejava.java9; import java.util.List; /**  * Java 9 Immutable List Example  * @author Ramesh Fadatare  *  */ public class ImmutableListExample { public static void main(String[] args) { // Creating Immutable List List < String > fruits = List.of("Banana", "Apple", "Mango", "Orange"); fruits.forEach(e - > System.out.println(e)); // You can't add Elements Immutable List // fruits.add("Strawberry"); // Exception in thread "main" java.lang.UnsupportedOperationException // in single list List < String > list = List.of("A", "B", "C", "D"); list.forEach(e - > System.out.println(e)); } }
Output:
Banana Apple mango orange A B C D

References


Java ArrayList Source Code Examples


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