Why do we need to define the main function as public and static??

Answer 1

main is the insertion point of compiler to run the program. The main method must be public so it can be found by the JVM when the class is loaded. Similarly, it must be static so that it can be called after loading the class, without having to create an instance of it....

Answer 2

public because everyone should be able to call it. The JVM is definitely not part of your program and public is the only way to let it access main method of your program.

static because when loading the program, there is going to be no instance of the class that main is defined in. Since only static methods allow to be called without object of the enclosing class, this is required.

You did not ask, but to be complete, void because the JVM likely has other means of reading exit status and does not require any non void return.

Answer 3

We create main() but we don't call it ,it is called by jvm .so we make it public and static because it does not require the reference of an object to be called.

Answer 4

Public Becuase all classes should access it and static becuase u won't need to repeat data in it (to lessen the storage that u use)