In Java, operators are symbols that are used to perform operations on variables and values. There are several types of operators in Java, including:

1. Arithmetic operators: These operators are used to perform arithmetic operations such as addition, subtraction, multiplication, and division.

+: addition
-: subtraction
*: multiplication
/: division
%: remainder (modulus)

2. Comparison operators: These operators are used to compare two values and return a boolean result.

==: equal to
!=: not equal to
> : greater than
<: less than
>=: greater than or equal to
<=: less than or equal to

3. Logical operators: These operators are used to perform logical operations such as AND, OR, and NOT.

&&: AND
||: OR
!: NOT

4. Assignment operators: These operators are used to assign a value to a variable.

=: assignment
+=: addition assignment
-=: subtraction assignment
*=: multiplication assignment
/=: division assignment
%=: remainder assignment

5. Increment and decrement operators: These operators are used to increment or decrement a value by 1.

++: increment
--: decrement

Here is an example of how to use some of these operators in Java:

int x = 10;
int y = 20;
int z = x + y; // z is 30
int a = x - y; // a is -10
int b = x * y; // b is 200
int c = y / x; // c is 2
int d = y % x; // d is 0

boolean e = x == y; // e is false
boolean f = x != y; // f is true
boolean g = x > y; // g is false
boolean h = x < y; // h is true

x += y; // x is 30
y -= x; // y is -10
z *= x; // z is 900
a /= y; // a is -2
b %= d; // b is 0

x++; // x is 31
y--; // y is -11