What does & mean in java

In Java, & is a bitwise AND operator, which compares the binary bits of two integer values ​​bit by bit. Only when both bits are 1, the result bit is 1, otherwise it is 0. Other uses of the & operator in Java include: logical AND (&&), conditional AND (&), and type checking (instanceof).

The meaning of & in Java

& is a bitwise AND operation in Java symbol. It compares the bit-by-bit bits of two integer values ​​(int or long) and returns a new value containing a 1 in the matching bit. The resulting bit is 1 if both bits are 1; otherwise it is 0.

Syntax:

int a = 10; // 二进制表示为 1010
int b = 6; // 二进制表示为 0110
int c = a & b; // 二进制表示为 0010

Result:

c = 2

Because 1010 & 0110 = 0010.

Other uses:

In addition to being used for bitwise AND operations, the & operator also has the following uses in Java:

• Logical AND (&&): When both Boolean values ​​are true, return true.
• Conditional AND (&): Execute the code block only when both boolean values ​​are true.
• Type check (instanceof): Check whether the object is the specified type or its subclass.

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