What is the definition and difference between static methods and non-static methods in Java?

Concept

1. The method modified by static is a static method. Static methods do not need to be called by instance objects and can be called directly using Class.method. For example, LocalDate.now() provided by JDK8 is a typical static method, which returns the current time

2. Non-static methods are common methods without static, which usually require the object to be initialized before calling. The above validate and getValue are non-static methods that are called after instantiating the User object

Instance

public static LocalDate now() { return now(Clock.systemDefaultZone()); }

What are the basic data types of java

Java Basic data types are divided into:

1. Integer type, used to represent the data type of integers.

2. Floating point type, a data type used to represent decimals.

3. Character type. The keyword of character type is "char".

4. Boolean type is the basic data type that represents logical values.

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