Set Example 1 : Collection « Apache Common « Java

Set Example 1

import org.apache.commons.collections.set.MapBackedSet;

import java.util.Map;
import java.util.Set;
import java.util.HashMap;
import java.util.Iterator;

public class SetExampleV1 {
  public static void main(String args[]) {
    // create a Map
    Map map = new HashMap();
    map.put("Key1", "Value1");

    // create the decoration
    Set set = MapBackedSet.decorate(map);

    map.put("Key2", "Any dummy value");

    Iterator itr = set.iterator();

    while(itr.hasNext()) {

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