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ArrayListRetainAllExample.java
import java.util.ArrayList; import java.util.List; /* * Example of retainAll(Collection<?> c) method */ public class ArrayListRetainAllExample { public static void main( String[] args ) { ArrayList<String> arrayList = new ArrayList<String>(); arrayList.add("Ram"); arrayList.add("Dave"); arrayList.add("Peter"); arrayList.add("Julia"); arrayList.add("Akram"); System.out.println("ArrayList : " + arrayList + "\n"); List<String> retainList = new ArrayList<String>(); retainList.add("Dave"); retainList.add("Peter"); System.out.println("RetainList : " + retainList + "\n"); /* * Retaining group of elements from the list */ arrayList.retainAll(retainList); System.out .println("ArrayList after retaining elements which are present in the retainList : " + arrayList + "\n"); } }
Output
ArrayList : [Ram, Dave, Peter, Julia, Akram] RetainList : [Dave, Peter] ArrayList after retaining elements which are present in the retainList : [Dave, Peter]
https://sites.google.com/site/javaee4321/java-collections/ArrayListDemoRetain.zip?attredirects=0&d=1
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