Why line 1 and 2 compile well? I only know there're 2 ways to represent a char, one is enclosing a char in single quote, like 'x', the other is to using unicode value specified using four hexadecimal digits, preceded by \u. While '101' doesn't fell in these 2. Are there any other ways to define a char?
When specifying the character literal as '\...' the dots must be replaced by an octal number, that is the first digit must be between 0 and 3 and the other two digits between 0 to 7. The legal range is '\000' to '\377' (i.e. decimal 0 to 255) See JLS sections JLS 3.10.4 Character Literals JLS 3.10.6 Escape Sequences for Character and String Literals [ November 01, 2002: Message edited by: Valentin Crettaz ]