hash table java code example

Example 1: hashtable in java

- HashTable don't have null key, sychronized(thread-safe)
  Good for parallel testing

Example 2: hashset in java

// iterate hashset in java
import java.util.HashSet;
public class HashSetForEach 
{
   public static void main(String[] args) 
   {
      HashSet<String> hs = new HashSet<String>();
      hs.add("Hello"); 
      hs.add("world"); 
      hs.add("Java"); 
      for(String str : hs)
      {
         System.out.println(str);
      }
   }
}