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# Java Examples - Collection Removal

## Problem Description:

How to remove a specific element from a collection?

## Solution:

Following example demonstrates how to remove a certain element from a collection with the help of collection.remove() method of Collection class.

    import java.util.*;

    public class CollectionTest {
       public static void main(String [] args) {
          System.out.println( "Collection Example!\n" );
          int size;
          HashSet collection = new HashSet ();
          String str1 = "Yellow", str2 = "White", str3 =
          "Green", str4 = "Blue";
          Iterator iterator;
          collection.add(str1);
          collection.add(str2);
          collection.add(str3);
          collection.add(str4);
          System.out.print("Collection data: ");
          iterator = collection.iterator();
          while (iterator.hasNext()){
             System.out.print(iterator.next() + " ");
          }
          System.out.println();
          collection.remove(str2);
          System.out.println("After removing [" + str2 + "]\n");
          System.out.print("Now collection data: ");
          iterator = collection.iterator();
          while (iterator.hasNext()){
             System.out.print(iterator.next() + " ");
          }
          System.out.println();
          size = collection.size();
          System.out.println("Collection size: " + size + "\n");
       }
    }

## Result:

The above code sample will produce the following result.

    Collection Example!

    Collection data: Blue White Green Yellow

    After removing [White]

    Now collection data: Blue Green Yellow

    Collection size: 3

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