Java arithmetic operators are used to perform mathematical operations on numerical data types. The following are the arithmetic operators in Java:

1. Addition: +
   The addition operator is used to add two or more numerical values.

int a = 10;
int b = 5;
int sum = a + b; // sum is 15

2. Subtraction: -
   The subtraction operator is used to subtract one numerical value from another.

int a = 10;
int b = 5;
int difference = a - b; // difference is 5

3. Multiplication: *
   The multiplication operator is used to multiply two or more numerical values.

int a = 10;
int b = 5;
int product = a * b; // product is 50

4. Division: /
   The division operator is used to divide one numerical value by another.

int a = 10;
int b = 5;
int quotient = a / b; // quotient is 2

Note that if the division operator is used with two integers, the result will be an integer. If the result of the division is a decimal value, it will be truncated to an integer value.

5. Modulus: %
   The modulus operator is used to find the remainder of a division operation.

int a = 10;
int b = 3;
int remainder = a % b; // remainder is 1

The modulus operator is often used to determine whether a number is even or odd. If a number is divisible by 2, the remainder will be 0, indicating that the number is even. If the remainder is 1, the number is odd.