array problem

[Shanky Sohar]

from kathy..........
page noc270

    class Dims {
public static void main(String[] args) {
int[][] a = {{1,2,}, {3,4}};
int[] b = (int[]) a[1];   // line 01
Object o1 = a;
 int[][] a2 = (int[][]) o1;
int[] b2 = (int[]) o1; //this throws runtime exception as int is subclass of object........
System.out.println(b[1]);
} }

the answers say if i remove
int[] b2 = (int[]) o1;
then code will compile fine and prints output as 4............but how..........i am not able to understand.........
how line 01 works.................

[Ankit Tripathi]

thers is no problem phil!

int[] b = (int[]) a[1];

in a simple way 1st not zeroth element of array a has been assigned which is "{3,4}".
and 4 will be printed because first not the "zeroth" element of array has been forced to print.

[Abimaran Kugathasan]

Have a look on here and here. Some useful topics!