Java Program of Pass by value and pass by reference

Java Program of Pass by value and pass by reference:

Example of passing arrays:

Code Screenshots:

Output of Above Java Program of Pass by value and pass by reference:

Screenshot:

Java Program of Pass by value and pass by reference:

Source Code:

/*

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 */

package passbyvalue;

/**

 *

 * @author selectivetopics

 */

public class Passbyvalue

{

   // main creates array and calls modifyArray and modifyElement

   public static void main( String[] args )

   {

      int[] array = { 1, 2, 3, 4, 5 };

      

      System.out.println( "The values of the original array are:" );

      // output original array elements 

      for ( int value : array )

         System.out.printf( "   %d", value );

   

      modifyArray( array ); // pass array reference

      System.out.println( "\n\nThe values of the modified array are:" );

      // output modified array elements 

      for ( int value : array )

         System.out.printf( "   %d", value );

   

      System.out.printf( 

         "\n\nEffects of passing array element value:\n" +

         "array[3] before modifyElement: %d\n", array[ 3 ] );

     modifyElement( array[ 3 ] ); // attempt to modify array[ 3 ]

      System.out.printf( 

         "array[3] after modifyElement: %d\n", array[ 3 ] );

   } // end main

   

   // multiply each element of an array by 2 

   public static void modifyArray( int array2[] )

   {

      for ( int counter = 0; counter < array2.length; counter++ )

         array2[ counter ] *= 2;

   } // end method modifyArray

   

   // multiply argument by 2

   public static void modifyElement( int element )

   {

      element *= 2;

      System.out.printf( 

         "Value of element in modifyElement: %d\n", element );

   } // end method modifyElement  

} // end class PassArray