Creating a Copy of a Collection: the objects are not cloned.

      

import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.HashSet;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.TreeMap;
import java.util.TreeSet;

public class Main {
  public static void main(String[] argv) throws Exception {
    List stuff = Arrays.asList(new String[] { "a", "b" });

    List list = new ArrayList(stuff);
    List list2 = new LinkedList(list);

    Set set = new HashSet(stuff);
    Set set2 = new TreeSet(set);

    Map map = new HashMap();
    Map map2 = new TreeMap(map);
  }
}

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Creating a Copy of a Collection: the objects are not cloned. : HashMap « Collections Data Structure « Java

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