What is the format of defining methods in java

The so-called method is an orderly combination of codes used to solve a type of problem. It is a functional module.

Generally, the syntax for defining a method is:

Among them:

1. Access modifier: The method is allowed to be accessed The scope of permissions can be public, protected, private or even omitted, where public means that the method can be called by any other code.

2. Return value type: The type of the method return value. If the method does not return any value, the return value type is specified as void; if the method has a return value, the return value type needs to be specified, and in the method Use the return statement in the body to return the value.

3. Method name: The name of the defined method must use a legal identifier.

4. Parameter list: The parameter list passed to the method. There can be multiple parameters. Multiple parameters are separated by commas. Each parameter consists of parameter type and parameter name, separated by spaces.

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According to whether the method has parameters and whether it has a return value, methods can be divided into four categories:

(1), no parameter and no return value method

(2), no parameter and return value method

(3), no parameter and no return value method

( 4) Methods with parameters and return values

The use of no-parameters and no-return-value methods in Java

If a method does not contain parameters and has no return value, we call it no-parameters and no return value. Methods.

Define method:

Note:

1. The method body is placed in a pair of braces to implement specific operations.

2. The method name is mainly used when calling this method. Pay attention to the naming convention. Generally, the first letter of the first word is lowercase and the first letter of other words is capitalized.

The use of methods with no parameters and return values ​​in Java

If a method does not contain parameters but has a return value, we call it a method with no parameters and a return value.

Definition method:

Usage of methods with parameters and no return value in Java

Definition method:

The use of methods with parameters and return values ​​in Java

If a method contains both parameters and return values, we call it a method with parameters and return values.

Definition method:

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