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Java™ Puzzlers: Traps, Pitfalls, and Corner Cases
book

Java™ Puzzlers: Traps, Pitfalls, and Corner Cases

by Joshua Bloch, Neal Gafter
June 2005
Beginner to intermediate content levelBeginner to intermediate
312 pages
6h 24m
English
Addison-Wesley Professional
Content preview from Java™ Puzzlers: Traps, Pitfalls, and Corner Cases

3. Puzzlers with Character

This chapter contains puzzles that concern strings, characters, and other textual data.

Puzzle 11: The Last Laugh

What does the following program print?

public class LastLaugh {    public static void main(String args[ ] ) {        System.out.print("H" + "a");        System.out.print('H' + 'a');    }}

Solution 11: The Last Laugh

If you are like most people, you thought that the program would print HaHa. It looks as though it concatenates H to a in two ways, but looks can be deceiving. If you ran the program, you found that it prints Ha169. Now why would it do a thing like that?

As expected, the first call to System.out.print prints Ha: Its argument is the expression "H" + "a", which performs the obvious string ...

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Publisher Resources

ISBN: 032133678XPurchase book