if(boolean)

[Niyas Ahmed Sheikh]

  
public class Q4
{
  public static void main(String args[])
  { 
     int i=3;
     System.out.println(getBoolean() ? i = 2 * i++ : i++ + ++i);
  }
 
  public static boolean getBoolean()
  {
      if((int) (Math.random() * 2) ==0);
      return false;
      else
      return true;
   }
}  

What is program logic behind the above pgm.In the getBoolean(), we are checking whether the number is generated randomly is zero. If so, we return false elase we return true. Correct me, if i am wrong.

Whether the if statment returns the boolean expr. that is if(boolean) is possible in java. I think I am messing up something?

[Paul Sturrock]

if((int) (Math.random() * 2) ==0);

This particular conditional statement does nothing. The clue as to why is in bold. (It shouldn't even compile).
[ August 11, 2005: Message edited by: Paul Sturrock ]

[Niyas Ahmed Sheikh]

Sorry, It is typographical error. There is no semicolon at the end of the if statement.

Correct one:
if((int) (Math.random() * 2) ==0)

[Joanne Neal]

Originally posted by Niyas Ahmed Sheikh:

  
public class Q4
{
  public static void main(String args[])
  { 
     int i=3;
     System.out.println(getBoolean() ? i = 2 * i++ : i++ + ++i);
  }
 
  public static boolean getBoolean()
  {
      if((int) (Math.random() * 2) ==0);
      return false;
      else
      return true;
   }
}  

What is program logic behind the above pgm.In the getBoolean(), we are checking whether the number is generated randomly is zero. If so, we return false elase we return true. Correct me, if i am wrong.

Whether the if statment returns the boolean expr. that is if(boolean) is possible in java. I think I am messing up something?

(int) (Math.random() * 2) will return either 0 or 1, therefore having getBoolean() return true or false depending on the returned value is simple a way of generating a random boolean value.

[Ilja Preuss]

As an aside,

if (x) return true; else return false;

can be nicely shortened to

return x;

[Marilyn de Queiroz]

In the getBoolean(), we are checking whether the number is generated randomly is zero. If so, we return false; else we return true. Correct me, if i am wrong.

true.

Whether the if statment returns the boolean expr. that is if(boolean) is possible in java.

"if (boolean)" is not only possible in Java, it is the only way to write an if statement. "if (0)" (or any other int) will not compile.