Java Programming Learning Notes

1.1

In Java language learning, programs are built from classes. We can create an arbitrary number of objects based on the definition of a class, which is called an instance of this class. We can imagine a class as a factory that has blueprints and instructions for making mechanical parts, and the object is the mechanical parts of this factory .

class contains Members, primarily fields and methods, and so on. A field is a data variable that belongs to the class itself or to a class object. They form the state of a class or object. A method is a collection of statements that manipulate fields that are used to process states. Statements define the behavior of classes, they can assign values to fields or other variables, the values of computer expressions, invoke methods, or also control the execution process.

1 class helloworld{2   Public Static void Main (string[] args) {3 System.out.println ("HelloWorld"); 4 }5 }

Java Programming Learning Notes