public static void main(String[] args) throws DAOException {

 int x = 1, y = 2;
 boolean b, c;
 b = true;
 c = false;

 if ((b = (x == 0)) && (c= (y == 2))) ;

 System.out.println("b should be false: b= " + b);
 System.out.println("c should be false: c= " + c);

 b = true;
 c = false;

 if ((b = (x == 0)) & (c= (y == 2))) ;

 System.out.println("b should be false: b= " + b);
 System.out.println("c should be true:  c= " + c);
}

public class NullTest
{
   public static void main(String args[])
   {
       String a = "a";
       String b = null;
       if (a.equals("b") && b.equals("a"))
       {
           System.out.println("a == b???  and what about
NullPointerException??");
       }
       System.out.println("a != b :)");
   }
}

If java whould evaluate both expressions in the if-statement, then it would
make a call to the equals-method of object b. But since b is null that would
cause an NullPointerException. If you run this program, you will see that no
exception is thrown. If you then change the a string to be "b" instead of
"a", then the first expression evaluates to true, and java evaluates the
second expression, resulting in a NullPointerException.

/Jimi

On Sun, 20 Nov 2005 23:10:26 GMT, "JS#"
<james.sarjeant90@ntlworld.com> wrote, quoted or indirectly quoted
someone who said :

see http://mindprod.com/jgloss/multiposting.html