In-depth understanding of Java static

Static is mainly used to modify filed and methods.

The static decorated member indicates that it belongs to the class itself and not to a single instance of the class, in other words, the static decorated property is a public property (a property that all objects can use)

The static modification method has the following limitations:

Static defined methods cannot call non-static methods or properties, and non-static defined methods can invoke static properties and methods.

The main reasons are:

1 methods that use static-defined properties can be used when an object is not instantiated

2 properties and methods that are not static defined must be instantiated before the object can be used

In-depth understanding of Java static