IS this question good? why

[huanyu zhao]

what is the value of j at line 17?

  public class Test{ 
  private static int j=0; 
  public static boolean methodB(int k){ 
    j+=k; 
   return true; 
  } 
  public static void methodA(int i){ 
   boolean b; 
   b=i>10&methodB(1); 
   b=i>10&&methodB(2); 
    } 
   public static void main(String args){ 
    methodA(0); 
 17) 
    } 
    } 

[ June 26, 2002: Message edited by: huanyu zhao ]

[Chung Huang]

Originally posted by huanyu zhao:

  public class Test{ 
  private static int j=0; 
  public static boolean methodB(int k){ 
    j+=k; 
   return true; 
  } 
  public static void methodA(int i){ 
   boolean b; 
   b=i>10&methodB(1); 
   b=i>10&&methodB(2); 
    } 
   public static void main(String args){ 
    methodA(0); 
 17) 
    } 
    } 

Correct me if I am wrong, wouldn't this thing produce a compiler error at the line that says

b=i>10&methodB(1); 

since i>10 gives me boolean value which & don't take? Or is it a runtime error since express are evaluated during runtime...either way I thought & is a bitwise operator that only take integer, while boolean is never evaluated as integers.

[geetha nagarajan]

The value of j would be 1 at line 17.
methodB() will be called only once,i.e in
b=i>10 & methodB(1);
Here, b=i>10 && methodB(2);

i>10 is false,so the methodB() will not be called.
[ June 26, 2002: Message edited by: geetha nagarajan ]

[Chung Huang]

Never mind, forgot about that short-circut nature
wouldn't j be 2? the call send over 2, and the line says j += k where j is 0 and k is the value send over which is 2.
[ June 26, 2002: Message edited by: Chung Huang ]

[geetha nagarajan]

& can take both boolean and integral operands.
&& can be applied to boolean expressions only.

[Amir Ghahrai]

To geetha
I thought the & operand is not short cutted!
only && is short-cutted. I thought the second operand always gets evaluated even if the first operand evaluates to false. but if you use && then if the result can be determined, then the second operand doesn't get evluated?
correct me please.

[geetha nagarajan]

To Amir,
Yes, && is short-circuited and not &.
Both operands r evaluated in case of &.

[Francisco A Guimaraes]

good question huanyu, just one detail:

public static void main(String args){ //you forgot to put the [] denoting an array

we always have to be aware of these little errors.
Francisco

[huanyu zhao]

Originally posted by geetha nagarajan:
The value of j would be 1 at line 17.
methodB() will be called only once,i.e in
b=i>10 & methodB(1);
Here, b=i>10 && methodB(2);

i>10 is false,so the methodB() will not be called.
[ June 26, 2002: Message edited by: geetha nagarajan ]

oh good! thank you!

[Deepali Pate]

The code in your very first post does not the main() properly defined is that a typo???
Coz if it is not the prograom will fail to run right??