下面是Java语言支持的赋值运算符:
操作符 | 描述 | 例子 |
---|---|---|
= | 简单的赋值运算符,将右操作数的值赋给左侧操作数 | C = A + B将把A + B得到的值赋给C |
+ = | 加和赋值操作符,它把左操作数和右操作数相加赋值给左操作数 | C + = A等价于C = C + A |
– = | 减和赋值操作符,它把左操作数和右操作数相减赋值给左操作数 | C – = A等价于C = C – A |
* = | 乘和赋值操作符,它把左操作数和右操作数相乘赋值给左操作数 | C * = A等价于C = C * A |
/ = | 除和赋值操作符,它把左操作数和右操作数相除赋值给左操作数 | C / = A,C 与 A 同类型时等价于 C = C / A |
(%)= | 取模和赋值操作符,它把左操作数和右操作数取模后赋值给左操作数 | C%= A等价于C = C%A |
<< = | 左移位赋值运算符 | C << = 2等价于C = C << 2 |
>> = | 右移位赋值运算符 | C >> = 2等价于C = C >> 2 |
&= | 按位与赋值运算符 | C&= 2等价于C = C&2 |
^ = | 按位异或赋值操作符 | C ^ = 2等价于C = C ^ 2 |
| = | 按位或赋值操作符 | C | = 2等价于C = C | 2 |
实例
下面的简单示例程序演示了赋值运算符。复制并粘贴下面的Java程序并保存为Test.java文件,然后编译并运行这个程序:
Test.java 文件代码:
public class Test {
public static void main(String[] args) {
int a = 10;
int b = 20;
int c = 0;
c = a + b;
System.out.println(“c = a + b = ” + c ); c += a ;
简单的赋值运算符,将右操作数的值赋给左侧操作数10+20=30
System.out.println(“c += a = ” + c ); c -= a ;
加和赋值操作符,它把左操作数和右操作数相加赋值给左操作C=30+10 =40
System.out.println(“c -= a = ” + c ); c *= a ;
减和赋值操作符,它把左操作数和右操作数相减赋值给左操作数
System.out.println(“c *= a = ” + c ); a = 10; c = 15; c /= a ;
乘和赋值操作符,它把左操作数和右操作数相乘赋值给左操作数C=30*10=300
System.out.println(“c /= a = ” + c );
a = 10;
c = 15;
c %= a ;
除和赋值操作符,它把左操作数和右操作数相除赋值给左操作数
System.out.println(“c %= a = ” + c ); c <<= 2 ;
System.out.println(“c <<= 2 = ” + c ); c >>= 2 ;
System.out.println(“c >>= 2 = ” + c ); c >>= 2 ;
System.out.println(“c >>= 2 = ” + c ); c &= a ;
System.out.println(“c &= a = ” + c ); c ^= a ;
System.out.println(“c ^= a = ” + c ); c |= a ;
System.out.println(“c |= a = ” + c ); } }
以上实例编译运行结果如下:
c = a + b = 30 c += a = 40 c -= a = 30 c *= a = 300 c /= a = 1 c %= a = 5 c <<= 2 = 20 c >>= 2 = 5 c >>= 2 = 1 c &= a = 0 c ^= a = 10 c |= a = 10