The difference between a Java static method and a singleton pattern

1, first understand the memory problem

Java memory is divided into two parts: heap memory, stack memory

Both static and non-static methods have only one copy in memory, and non-static methods use this to pass in the current object by default when invoked;

2, static methods can not be rewritten

The static method is

3, the use of

A static method can be called without a new instance, and a non-static method must be called by a new instance;

4. Loading timing Issues

The static method is loaded into memory when the class is loaded;

The difference between a Java static method and a singleton pattern