Array.

　　We have to keep in mind that,the 'new' keyword create an array at the runtime rather that at the compile time,that is,at the compile time,jvm just check the syntax.

 1 /*

 2 Array demonstration.

 3 Note that, the 'new' keyword does not create an array of 'a' until the runtime,that is,at the compile time,the jvm just check the syntax.

 4 */

 5 import kju.print.Print;

 6 class ArrayDemo 

 7 {

 8     public static void main(String[] args) 

 9     {

10         Print.println("---------------");

11         int[] a = new int[5];

12         Print.println("a[1] = " + a[1]);

13         Print.println("a[5] = " + a[5]);    //ArrayIndexOutOfBoundsException: 5,but [compile well].

14         Print.println("---------------");

15         a = null;

16         Print.println(a[2]);    //java.lang.NullPointerException,but [compile well].

17     }

18 }