About Question enthuware.ocajp.i.v7.2.1397 :

[coder007]

Typo in the explanation: instead of

y = y/dy => becomes 10/10 i.e. 2

it should be

y = y/dy => becomes 20/10 i.e. 2

[admin]

Fixed.
thank you for your feedback!

[ArnobDe]

Please check the code as it failed to compile.

error: illegal character: '\u00a0'

Also, as far as I know local variables(dy, dx) should be initialized at the time of declaration as they do not get default values like that of instance variables.

jdk version: 1.8 update 25

[admin]

Code works fine.

Also, as far as I know local variables(dy, dx) should be initialized at the time of declaration as they do not get default values like that of instance variables.

That is not correct. local variables have to be initialized before they are used (not necessarily at the time of declaration).

-Paul.

[ArnobDe]

That is not correct. local variables have to be initialized before they are used (not necessarily at the time of declaration).

Thanks Paul for providing a better understanding of the concept...

However, I'm simply pasting my the code below and I'll be relieved to discover what went wrong..

Code: Select all

public class CrazyMath {  
   public static void main(String[] args) {    
     int x = 10, y = 20; 
     int dx, dy; 
     try{   
         dx = x % 5;    
         dy =  y/dx;  
       }catch(ArithmeticException ae){     
        System.out.println("Caught AE");  
           dx = 2;        
           dy = y/dx;  
       }      
       x = x/dx;    
       y = y/dy;       
   
       System.out.println(dx+" "+dy);  
       System.out.println(x+" "+y);        
 }
}

Thanks again in advance...

[admin]

I am sorry I don't understand what you mean. The error message you posted above indicates that you have special characters in your code. If you copied and pasted the code from ETSViewer, you might get that problem because of space characters.

HTH,
Paul.

[ArnobDe]

Oh, now I get it. I did actually copy pasted it from ETSViewer which might have caused the compiler to throw an error corresponding to space characters as you have mentioned. Guess I'll have to rewrite it.

Thanks again Paul !

[admin]

You can also just copy the special space character from the code and then do a replace all with the regular space character instead of rewriting.