Why main method is defined public static

Question

public static void main(String[] arcs) {}

Answer 1

[ public ]
Because the program entry point needs to expose to the public so it can be invoked/called and run properly.

[ static ]
Because the program was invoked/called without its class instantiated during runtime. You may imagine the program was called like this

MyClass.main();

instead of this

MyClass obj = MyClass();
obj.main();

P/S: This question has been asked so many times so please use the search in Discussion next time.

Answer 2

Based on Zephyr Koo's answer, If main method is not declared static, you need to create object so that your problem can run successfully😂