赋值运算符左面的操作数必须是变量，不能是常量或表达式，赋值表达式的值就是=左面变量的值。
注意：
1）不要将赋值运算符=与关系运算符==混淆。
2）除赋值运算符=外，还有扩展赋值运算符。
| 赋值运算符 | 说明 | 举例 |
| = | 将右操作数的值赋给左操作数 | c=a+b |
| += | 将左操作数和右操作数相加的值赋给左操作数 | c+=a等价于c=c+a |
| -= | 将左操作数和右操作数相减的值赋给左操作数 | c-=a等价于c=c-a |
| *= | 将左操作数和右操作数相乘的值赋给左操作数 | c*=a等价于c=c*a |
| /= | 将左操作数和右操作数相除的值赋给左操作数 | c/=a等价于c=c/a |
| %= | 将左操作数和右操作数取余后的值赋给左操作数 | c%=a等价于c=c%a |
| &= | 按位与赋值运算符 | c&=1等价于c=c&1 |
| |= | 按位或赋值运算符 | c|=1等价于c=c|1 |
| ^= | 按位异或赋值运算符 | c^=1等价于c=c^1 |
| >>= | 按位右移赋值运算符 | c>>=1等价于c=c>>1 |
| <<= | 按位左移赋值运算符 | c<<=1等价于c=c<<1 |
实例：
public class Main {
public static void main(String[] args) {
int a = 1;
int b = 2;
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 = 3;
c = 4;
c /= a ;
System.out.println("c /= a = " + c );
a = 5;
c = 6;
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 ;
System.out.println("c ^= a = " + c );
c >>= 1 ;
System.out.println("c >>= 1 = " + c );
c <<= 1 ;
System.out.println("c <<= 1 = " + c );
}
}运行结果如下：
c = a + b = 3 c += a = 4 c -= a = 3 c *= a = 3 c /= a = 1 c %= a = 1 c &= a = 1 c |= a = 5 c ^= a = 0 c >>= 1 = 0 c <<= 1 = 0
本文固定URL：https://www.dotcpp.com/course/728