Weird java behavior with casts to primitive types
This was probably asked somewhere but I couldn't find it. Could someone clarify why this code compiles and prints out 1
?
long i = (byte) + (char) - (int) + (long) - 1;
System.out.println(i);
It's being parsed as this:
long i = (byte)( +(char)( -(int)( +(long)(-1) ) ) );
where all the +
and -
operators are unary +
or -
.
In which case, the 1
gets negated twice, so it prints out as a 1
.
Because both '+' and '-' are unary operators, and the casts are working on the operands of those unaries. The rest is math.
Unary operators and casting :)
+1 is legal
(byte) + 1 is casting +1 to a byte.
Sneaky! Made me think.