Sets Intersection 

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 Sets.intersection() API. It returns an unmodifiable view of the intersection of two sets.

File Name  :   com/bethecoder/tutorials/guava/collection_tests/SetsIntersectionTest.java  Author  :   Sudhakar KV Email  :   [email protected]

package com.bethecoder.tutorials.guava.collection_tests; import java.util.Set; import com.google.common.collect.ImmutableSet; import com.google.common.collect.Sets; public class SetsIntersectionTest {   /**    * @param args    */   public static void main(String[] args) {     ImmutableSet<String> stringSet = ImmutableSet.of("ONE", "TWO", "THREE");     System.out.println(stringSet);          ImmutableSet<String> stringSet2 = ImmutableSet.of("TWO", "THREE", "FOUR");     System.out.println(stringSet2);          Set<String> resultSet = Sets.intersection(stringSet, stringSet2);     System.out.println(resultSet);   } }

[ONE, TWO, THREE]
[TWO, THREE, FOUR]
[TWO, THREE]