Difference between revisions of "Misc"
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* int __; | * int __; | ||
* String $; | * String $; | ||
| + | |||
| + | Literals | ||
| + | |||
| + | * Default type of an integer literal is int. | ||
| + | * Long can be specified by adding l or L | ||
| + | * Octal prefix with 0 | ||
| + | * Hex prefix with 0x or 0X | ||
| + | * Floating point literals default type is double. | ||
| + | * Double can also be explicitly by adding the suffix d or D | ||
| + | * Float is denoted by suffix f or F | ||
| + | |||
[[Category:OCPJP]] | [[Category:OCPJP]] | ||
Revision as of 23:33, 20 June 2011
This covers Objective 1.3
Legal Identifiers
- Can be composed of characters, numbers, currency-symbols and connecting chars such as underscore.
- Definition of characters are interpreted according to the charset.
- NO special chars such as #, :, ;, @, -, etc...
- Must start with letter, currency char, underscore but CANNOT start with a digit !
- Java identifiers are case-sensitive.
Illegal identifiers:
- int 23age;
- String em@iladd;
- List all-accounts;
These are legal!:
- int __;
- String $;
Literals
- Default type of an integer literal is int.
- Long can be specified by adding l or L
- Octal prefix with 0
- Hex prefix with 0x or 0X
- Floating point literals default type is double.
- Double can also be explicitly by adding the suffix d or D
- Float is denoted by suffix f or F
