Operators
Java Platform, Enterprise Edition (Java EE) 8
The Java EE Tutorial

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Operators

In addition to the . and [] operators discussed in Value and Method Expressions, the EL provides the following operators, which can be used in rvalue expressions only.

  • Arithmetic: +, - (binary), *, / and div, % and mod, - (unary).

  • String concatenation: +=.

  • Logical: and, &&, or, ||, not, !.

  • Relational: ==, eq, !=, ne, <, lt, >, gt, <=, ge, >=, le. Comparisons can be made against other values or against Boolean, string, integer, or floating-point literals.

  • Empty: The empty operator is a prefix operation that can be used to determine whether a value is null or empty.

  • Conditional: A ? B : C. Evaluate B or C, depending on the result of the evaluation of A.

  • Lambda expression: ->, the arrow token.

  • Assignment: =.

  • Semicolon: ;.

The precedence of operators, highest to lowest, left to right, is as follows:

  • [] .

  • () (used to change the precedence of operators)

  • - (unary) not ! empty

  • * / div % mod

  • + - (binary)

  • +=

  • <> <= >= lt gt le ge

  • == != eq ne

  • && and

  • || or

  • ? :

  • ->

  • =

  • ;


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