C++和Java運算符優先級表

1. C++ operator precedence

Precedence	Operator	Description	Associativity
1	::	Scope resolution	Left-to-right
2	++   --	Suffix/postfix increment and decrement
	()	Function call
	[]	Array subscripting
	.	Element selection by reference
	−>	Element selection through pointer
3	++   --	Prefix increment and decrement	Right-to-left
	+   −	Unary plus and minus
	!   ~	Logical NOT and bitwise NOT
	(type)	Type cast
	*	Indirection (dereference)
	&	Address-of
	sizeof	Size-of
	new, new[]	Dynamic memory allocation
	delete, delete[]	Dynamic memory deallocation
4	.*   ->*	Pointer to member	Left-to-right
5	*   /   %	Multiplication, division, and remainder
6	+   −	Addition and subtraction
7	<<   >>	Bitwise left shift and right shift
8	<   <=	For relational operators < and ≤ respectively
	>   >=	For relational operators > and ≥ respectively
9	==   !=	For relational = and ≠ respectively
10	&	Bitwise AND
11	^	Bitwise XOR (exclusive or)
12	|	Bitwise OR (inclusive or)
13	&&	Logical AND
14	||	Logical OR
15	?:	Ternary conditional	Right-to-left
	=	Direct assignment (provided by default for C++ classes)
	+=   −=	Assignment by sum and difference
	*=   /=   %=	Assignment by product, quotient, and remainder
	<<=   >>=	Assignment by bitwise left shift and right shift
	&=   ^=   |=	Assignment by bitwise AND, XOR, and OR
16	throw	Throw operator (for exceptions)
17	,	Comma	Left-to-right

2. Java operator precedence

The operators in Java, shown in order of precedence - from highest to lowest

Priority	Operators	Operation	Associativity
1	[ ]	array index	left
	()	method call
	.	member access
2	++	pre- or postfix increment	right
	--	pre- or postfix decrement
	+ -	unary plus, minus
	~	bitwise NOT
	!	boolean (logical) NOT
	(type)	type cast
	new	object creation
3	* / %	multiplication, division, remainder	left
4	+ -	addition, substraction	left
	+	string concatenation
5	<<	signed bit shift left	left
	>>	signed bit shift right
	>>>	unsigned bit shift right
6	< <=	less than, less than or equal to	left
	> >=	greater than, greater than or equal to
	instanceof	reference test
7	==	equal to	left
	!=	not equal to
8	&	bitwise AND	left
	&	boolean (logical) AND
9	^	bitwise XOR	left
	^	boolean (logical) XOR
10	|	bitwise OR	left
	|	boolean (logical) OR
11	&&	boolean (logical) AND	left
12	||	boolean (logical) OR	left
13	? :	conditional	right
14	=	assignment	right
	*= /= += -= %= <<= >>= >>>= &= ^= |=	combinated assignment  (operation and assignment)

reference: 

1. http://en.cppreference.com/w/cpp/language/operator_precedence

2. http://bmanolov.free.fr/javaoperators.php