Arithmetic |
+, -, *, /, div, %, mod, - |
- / and div are the same, while % and mod are the same.
|
Logical |
and, &&, or, </p></td>
</nowiki>, not, !, empty |
</tr>
Relational |
==, eq, !=, ne, <, lt, >, gt, <=, ge, >=, le |
- Comparisons can be made against other values, or against boolean,
string, integer, or floating point literals.
|
Conditional |
A ? B : C |
It evaluate B or C, depending on the result of the evaluation of
A. |
Index |
[] |
To evaluate expr-a[expr-b], evaluate expr-a into value-a and
evaluate expr-b into value-b. If either value-a or value-b is null,
return null.
- If value-a is a Map, return value-a.get(value-b). If
!value-a.containsKey(value-b), then return null.
- If value-a is a List or array, coerce value-b to int and return
value-a.get(value-b) or Array.get(value-a, value-b), as appropriate. If
the coercion couldn't be performed, an error is returned. If the get
call returns an IndexOutOfBoundsException, null is returned. If the get
call returns another exception, an error is returned.
- If value-a is a JavaBeans object, coerce value-b to String. If
value-b is a readable property of value-a, then return the result of a
get call. If the get method throws an exception, an error is
returned.
|
Member |
. |
- Properties of variables are accessed using the . operator and can be
nested arbitrarily.
- The value of a map can be accessed by using the . operator.
|
</tbody>
</table>
> ------------------------------------------------------------------------
>
>
The relative precedence levels of operators from the highest to lowest,
left to right are as follows:
- \[\] .
- ()[^2]
- \- [^3] not ! empty
- \* / div % mod
- \+ - [^4]
- \< \> \<= \>= lt gt le ge
- == != eq ne
- && and
- \|\| or
- ? :
> ------------------------------------------------------------------------
>
>
[^1]: The information is from [JSP Tutorial](http://download.oracle.com/javaee/1.4/tutorial/doc/JSPIntro7.html).
[^2]: Used to change the precedence of operators.
[^3]: unary
[^4]: binary
|