赋值运算符
赋值运算符
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 |
简单示例程序演示了赋值运算符：
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 ;
System.out.println("c += a = " + c );
c -= a ;
System.out.println("c -= a = " + c );
c *= a ;
System.out.println("c *= a = " + c );
a = 10;
c = 15;
c /= a ;
System.out.println("c /= a = " + c );
a = 10;
c = 15;
c %= a ;
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 );
}
}
/**
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
**/