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java 运算符参考手册
时间:2011-05-08 编辑:简简单单 来源:一聚教程网
Precedence Operator Description Association
1 ++,-- Postincrement, Postdecrement R -> L
2 ++,-- Preincrement, Predecrement R -> L
+,- Unary plus, unary minus R -> L
~ Bitwise compliment R -> L
! Boolean NOT R -> L
3 new Create object R -> L
(type) Type cast R -> L
4 *,/,% Multiplication, division, remainder L -> R
5 +,- Addition, subtraction L -> R
+ String concatenation L -> R
6 <<, >>, >>> Left shift, right shift, unsigned right shift L -> R
7 <, <=, >, >= L -> R
instanceof Type comparison L -> R
8 ==, != Value equality and inequality L -> R
==, != Reference equality and inequality L -> R
9 & Boolean AND L -> R
& Bitwise AND L -> R
10 ^ Boolean XOR L -> R
^ Bitwise XOR L -> R
11 | Boolean OR L -> R
| Bitwise OR L -> R
12 && Conditional AND L -> R
13 || Conditional OR L -> R
14 ?: Conditional Ternary Operator L -> R
15 =,+=,-=, Assignment Operators R -> L
*=,/ =,%=,
&=,^=, |=,
<<=, >> =,
>>>=
Operator Precedence Group Associativity Operator Precedence
(), [], postfix ++, postfix -- left Highest
unary +, unary -, prefix ++, prefix --, ~, ! right
(type), new left
*, /, % left
+, - left
<<, >>, >>> left
< ,<= , >, >=, instanceof
==, !=
& left
^ left
| left
&& left
|| left
?: left
=, +=, -=, *=, /=, %=, <<=, >>=, >>>=, &=, |=, ^= right lowest
简单加号运算
public class MainClass {
public static void main(String[] arg) {
int count = 1;count += 5;
System.out.println(count);count = count + 5;
System.out.println(count);}
}
条件运行与逗号运算符
if(value > conditionValue){
result = result1;
}else{
result = result2;
}logical_expression ? expression1 : expression2
public class MainClass {
public static void main(String[] args) {
int v = 1;
System.out.println(v == 1 ? "A" : "B");v++;
System.out.println(v == 1 ? "A" : "B");
}
}
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