Arraylist and Set Example

package mypackage;

import java.util.*;

public class FirstIterator {

      public static void main(String[] args) {

            ArrayList a = new ArrayList();

            //Set b = new HashSet();

            //String[] values = {"java","java2"};

            String abc = "hi";

            String abc1="hello";

           

            a.add(abc);

            a.add(abc1);

           

            //System.out.println(a.size());

            int i =0;

      try{ 

            for(Iterator a1 = a.iterator();a1.hasNext();)

            {

                  String myword=(String)a.get(i);

                  System.out.println(myword);

                  i++;

            }

      }

      catch (Exception e)

      {

            System.out.println("Done");

      }

      }

}

To use set

import java.util.HashSet;
import java.util.Set;

public class FindDups {
public static void main(String args[]) {
Set s = new HashSet();
String[] values = new String[] { "java", "java2", "java2s", "javas",
"java" };
for (int i = 0; i < values.length; i++)
if (!s.add(values[i]))
System.out.println("Duplicate detected: " + values[i]);

System.out.println(s.size() + " distinct words detected: " + s);
}
}