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confusion regarding mitidimentional array please help

shashank pratap
Greenhorn

Joined: Aug 11, 2009
Posts: 13
class Dims{
public static void main(String[] args){
int [][] a={{1,2},{3,4}};
int[] b=(int[])a[1];
Object o1=a;
int [][] a2=(int[][])o1;
System.out.println(b[1]);
}}

the answer to this q is given is " an exception is thrown at runtime" page number 278 Kathy & Bert (310-065)
but when i compile this program on java5 compiler this showing me the output
please help m,e
M K Rayapudi
Ranch Hand

Joined: Feb 19, 2007
Posts: 157
in the text book, the following line of code is also there

int[] b2 = (int[]) o1;

check once again the text book


R6i
 
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subject: confusion regarding mitidimentional array please help