Comparing performance in a pgm

Comparing performance

public class StringComparePerformance

{

   public static void main(String[] args)

   {     

      long startTime = System.currentTimeMillis();

      for(int i=0;i<50000 i="" span="">

      {

         String s1 = "hello";

         String s2 = "hello";

      }

      long endTime = System.currentTimeMillis();

      System.out.println("Time taken for creation" + " of String literals : "+ (endTime - startTime) + " milli seconds" );      

      long startTime1 = System.currentTimeMillis();

      for(int i=0;i<50000 i="" span="">

       {

         String s3 = new String("hello");

         String s4 = new String("hello");

         }

      long endTime1 = System.currentTimeMillis();

      System.out.println("Time taken for creation" + " of String objects : " + (endTime1 - startTime1)+ " milli seconds");

       }

       }

public class StringOptimization

{

   public static void main(String[] args)

   { 

      String variables[] = new String[50000];       

      for( int i=0;i <50000 i="" span="">

       {

         variables[i] = "s"+i;

      }

      long startTime0 = System.currentTimeMillis();

      for(int i=0;i<50000 i="" span="">

      {

         variables[i] = "hello";

      }

      long endTime0 = System.currentTimeMillis();

      System.out.println("Creation time" + " of String literals : "+ (endTime0 - startTime0)       + " ms" );

      long startTime1 = System.currentTimeMillis();

      for(int i=0;i<50000 i="" span="">

      {

         variables[i] = new String("hello");

      }

      long endTime1 = System.currentTimeMillis();

      System.out.println("Creation time of" + " String objects with 'new' key word : " + (endTime1 - startTime1)      + " ms");

      long startTime2 = System.currentTimeMillis();

      for(int i=0;i<50000 i="" span="">

      {

         variables[i] = new String("hello");

         variables[i] = variables[i].intern();                          

      }

      long endTime2 = System.currentTimeMillis();

      System.out.println("Creation time of" + " String objects with intern(): " 

      + (endTime2 - startTime2) + " ms");

   }

}