LastLaugh.java
public?class?LastLaugh
{
????public?static?void?main(String?args[])
????{
????????System.out.print("H"?+?"a");?//Ha
????????System.out.println('H'?+?'a');?//169
????}
}
但 + 和char型同時出現的時候，分清運算是字符串連接運算還是簡單的算術運算。
JSL 5.1.2、5.6.2
Puzzle 12:
Abc.java
public?class?Abc
{
????public?static?void?main(String[]?args)
????{
????????String?letters?=?"ABC";
????????char[]?numbers?=?{'1',?'2',?'3'};
????????char?[]?chars?=?{'a',?'b',?'c'};
????????System.out.println(letters?+?"easy?as?"?+?numbers);?//?ABCeasy?as?[C@de6ced
????????System.out.println(letters?+?"?easy?as?"?+?chars);?//?ABC?easy?as?[C@c17164
????????System.out.println(numbers);?//?123
????????System.out.println(chars);?//?abc
????}
}
關于數組的，參見JSL 10