Assignment operators

Assignment operators assign a value to a variable. The basic assignment is =. Java also provides compound assignment operators that combine an operation with assignment.

Operator	Description	Equivalent
=	Simple assignment	a = b
+=	Add and assign	a = a + b
-=	Subtract and assign	a = a - b
*=	Multiply and assign	a = a * b
/=	Divide and assign	a = a / b
%=	Modulus and assign	a = a % b
&=	Bitwise AND and assign	a = a & b
|=	Bitwise OR and assign	a = a | b
^=	Bitwise XOR and assign	a = a ^ b
<<=	Left shift and assign	a = a << b
>>=	Right shift and assign	a = a >> b
>>>=	Unsigned right shift and assign	a = a >>> b

Examples:

int x = 5;
x += 3;      // x = 8
x *= 2;      // x = 16
x %= 5;      // x = 1

String s = "Hello";
s += " World"; // s = "Hello World"

Important: Compound assignments perform an implicit cast to the target type.

byte b = 10;
b += 5;      // b = 15 (implicit cast, no error)
// b = b + 5; // error: int to byte requires cast