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Could u explain this code....

 
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Given the following code what will be output?

I am thinking this oupt put will be 10 , 20....but it shows tht output is 10,40.

For variable i - its passing a copy..so if there are any changes in the method, it doesnt reflect i. How the value of j is changing.

public class Pass{
static int j=20;
public static void main(String argv[]){
int i=10;
Pass p = new Pass();
p.amethod(i);
System.out.println(i);
System.out.println(j);
}

public void amethod(int x){
x=x*2;
j=j*2;
}
}

1) Error: amethod parameter does not match variable
2) 20 and 40
3) 10 and 40
4) 10, and 20
 
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The parameter isn't affected, but in the method the class variable j is changed.
 
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j is a static variable. When one object updates its value, all object will get updated value.
Even with Pass.j, changed value will be reflected.


Regards

Naseem
[ June 28, 2006: Message edited by: Naseem Khan ]
 
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