Thursday, 4 May 2017

Java Tutorial: System class in java [How to copy elements from src array to dest array]


Click here to watch in Youtube :
https://www.youtube.com/watch?v=Is7BLMK92oM&list=UUhwKlOVR041tngjerWxVccw

 ArrayCopyDemo.java
/*
 * public static void arraycopy(Object src, int srcPos,
 *                  Object dest, int destPos, int length)
 * 
 * Parameters: 
 * -----------
 * 
 * src - the source array. 
 * srcPos - starting position in the source array. 
 * dest - the destination array.
 * destPos - starting position in the destination data.
 * length - the number of array elements to be copied.
 */

public class ArrayCopyDemo
{

    public static void main(String[] args)
    {
        int srcArray[] =
        { 30, 40, 50 };
        int destArray[] =
        { 1, 2, 3, 4 };

        System.out.print("Before copy, destArray = ");
        for (int i : destArray)
        {
            System.out.print(i + ",");
        }

        /*
         * Copies an array from the specified source array,
         * beginning at the specified position, to the
         * specified position of the destination array.
         */
        System.arraycopy(srcArray, 0, destArray, 0, 3);
        System.out.print("\nAfter copy, destArray = ");
        for (int i : destArray)
        {
            System.out.print(i + ",");
        }

    }
}
Output
Before copy, destArray = 1,2,3,4,
After copy, destArray = 30,40,50,4,
Click the below link to download the code:
https://sites.google.com/site/ramj2eev1/home/javabasics/SystemDemo_ArrayCopy_App.zip?attredirects=0&d=1

Github Link:
https://github.com/ramram43210/Java/tree/master/BasicJava/SystemDemo_ArrayCopy_App

Bitbucket Link:
https://bitbucket.org/ramram43210/java/src/2f1fa585daa61fc8fa0957d6f04b940eddbcf7ec/BasicJava/SystemDemo_ArrayCopy_App/?at=master

See also:
  • All JavaEE Viedos Playlist
  • All JavaEE Viedos
  • All JAVA EE Links
  • Servlets Tutorial
  • All Design Patterns Links
  • JDBC Tutorial
  • Java Collection Framework Tutorial
  • JAVA Tutorial
  • Kids Tutorial
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