OOP
You can not write Java code without defining a class.
좀 뜬금없지만, 클래스 없이 자바를 쓸 수 있을까...? 🤔 Yes, you need at least one class to have a program, but no, you do not need any methods (contrary to some other answers). The reason you need a class is because in Java, all code is inside classes. So to have any code, you need a class. However, code doesn't necessarily need to be in a method. It can also be in initializers. So, here is a complete Java progr..