Puzzle (It’s Elementary)

Consider the following example.

package demo;

public class App {
  public static void main( String[] args ) {
    System.out.println( 12345 + 5432l );
  }
}

What do you think the above will print?

17777

This example was taken from PUZZLE 4: IT’S ELEMENTARY in Java™ Puzzlers: Traps, Pitfalls, and Corner Cases.

“Things are seldom what they seem. Take this program, for instance. It doesn’t say what you think it does. Take a careful look at the two operands of the + operator. We are adding the int value 12345 to the long value 5432l. Note the subtle difference in shape between the digit 1 at the beginning of the left operand and the lowercase letter *el* at the end of the right operand.”