Static & Non static variables

🔁 What is a Static Variable?
A static variable belongs to the class, not to any specific object of that class. That means all objects share the same static variable. It’s like having one copy of a variable that everyone uses.
Static variables Can be accessed from any part of the program.
When a variable is declared as static, then a single copy of the variable is created and shared among all objects at a class level.
✅We can create static variables at class level only.Static variables can be accessed by static and non static methods.
They are class specified.

🏫 Non-Static Variable
A non-static variable (also called an instance variable) belongs to an object. Every time you create a new object, it gets its own copy of that variable.
✅Non static variables can be accessed using instance (object) of a class.In non Static variable Memory is allocated each time an instance of the class is created.They are object specific.

class Student {
    static String schoolName = "Green Valley High";  // shared by all students (static)
    String studentName;                              // each student has their own name (non-static)
}

public class Main {
    public static void main(String[] args) {
        Student s1 = new Student();
        Student s2 = new Student();

        s1.studentName = "Aarav";
        s2.studentName = "Diya";

        System.out.println("Student 1:");
        System.out.println("Name: " + s1.studentName);              // non-static
        System.out.println("School: " + Student.schoolName);       // static (accessed using class name)

        System.out.println("\nStudent 2:");
        System.out.println("Name: " + s2.studentName);              // non-static
        System.out.println("School: " + Student.schoolName);       // static (same for all)
    }
}