What are the operators of Java

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I. operator

1. Arithmetic operator

+ addition

-subtraction

* multiplication

/ division (division of integers can only get the result of integers. In order to get a decimal, one party involved in the operation must be a decimal)

% surplus

+ + self-increasing

-self-subtraction

Used alone: + and-have the same effect in front of and after the variable. All allow variables to increase or decrease.

Participate in the operation to use:

If + + or-is placed in front of the variable, it is self-increasing or self-decreasing before assigning a value.

If + + or-is placed after the variable, it is used with the original value first. And then increase or subtract.

Sample code

two。 Characters participate in + sign operation

When the character participates in the operation, the corresponding code table value is used for the operation.

'A' 65'a'97'0' 48

Data type conversion rules when different data types participate in the operation

Byte, short, char- > int- > long- > float- > double

Sample code

3. String participates in + sign operation

A string concatenated with a + sign with any data type will form a new string

The string is in front of it, and what we do is string concatenation.

The string is at the back, do the previous operation first, and then concatenate with the string

Sample code

4. Assignment operator

= assignment

+ = perform addition operation and then assign a value

-= subtract and then assign a value

* = perform multiplication and then assign a value

/ = divide and then assign a value

% = take the remainder and then assign the value

Sample code

5. Comparison (relational) operator

Greater than >

Less than =

Less than or equal to