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 Tools and Libs > Google Guava > Collections > Immutable Map

Immutable Map 

Google Guava is a java library with lot of utilities and reusable components. This requires the library guava-10.0.jar to be in classpath. The following example shows using ImmutableMap class. It returns an immutable map implementation which doesn't allow null keys and values.

File Name  :  
Author  :  Sudhakar KV
Email  :  [email protected]
package com.bethecoder.tutorials.guava.collection_tests;

import java.util.Map;


public class ImmutableMapTest {

   @param args
  public static void main(String[] args) {
    Map<String, Integer> immutableMap = ImmutableMap.of("ONE"1"TWO"2"THREE"3);


It gives the following output,
{ONE=1, TWO=2, THREE=3}


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