Copy Elements of One Java ArrayList to Another Java ArrayList Example

import java.io.BufferedReader;
import java.io.IOException;
import java.io.FileReader;
import java.util.ArrayList;
import java.lang.Package;
import java.util.*;
 
 
public class ReadIntsArrayList
{
    public static void main( String [ ] args )
    {
        ArrayList array = getStrings( );
    //  ArrayList <String> duplicateValues = new ArrayList<String>( );
    //    String token = null;
            int [ ] array2 = new int [ array.size( )  ];
 
 
 
  for( int i = 0; i < array.size( ); i++ )
            for (int j = i+1  ; j < array.size ( ) ; j++ )
            {
                if(array.get(j).equals(array.get(i)))
                {
 
                 //   array2[j] = array.get(j);
            //     System.out.println(array2[j]);
      //       duplicateValues.add(array.get(j));
            System.out.println("i value is: "+array.get(i));
            System.out.println("i index is: "+i);
            System.out.println("j value is: "+array.get(j));
            System.out.println("j index is: "+j);
 
          // System.out.println(array2[i]);
 
                }
       /*
        else 
              {
                  System.out.println("The file contains no duplicates.");
               }
        */
            }
 
 
    }
 
 
    public static ArrayList getStrings( )
    {
        FileReader theFile;
	BufferedReader fileIn = null;
 
             ArrayList <String> resList = new ArrayList<String>( );
        String oneLine;
        StringTokenizer tokenizer = null;
       // String token = null;
 
        try
        {
            theFile = new FileReader(  "C:\\partTwo1.txt" );
            fileIn  = new BufferedReader( theFile );
            while( ( oneLine = fileIn.readLine( ) ) != null &&
                    !oneLine.equals( "" ) )
            {
                tokenizer = new StringTokenizer(oneLine);
 
                while (tokenizer.hasMoreTokens()){
                resList.add(tokenizer.nextToken()); }
            }
 
        }
        catch( IOException e )
        {
            System.out.println( "Unexpected IO Exception has shortened amount read" );
        }
 
      //  System.out.println( "Done reading" );
        return resList;
    }
}