Static vs Non-Static in JAVA

Static vs Non-Static in Java When learning Java, one very important concept is Static vs Non-Static (Instance). If you understand this clearly, Java and OOP will become much easier. What is Static? static is a keyword used to create variables or methods that belong to the class, not to objects. Example: class Student { static String college = "ABC College"; } Access: System.out.println(Student.college); Key Idea: Only one copy is created Shared by all objects No need to create an object What is Non-Static? (Instance) Non-static means it belongs to an object (instance). Example: class Student { int id; String name; } Access: Student s1 = new Student(); s1.id = 101; s1.name = "Ram"; ** Key Idea:** Each object has its own copy Must create an object to use it ✔️ rollNo, name → Non-static ✔️ college → Static When to Use Static? Use static when data is common for all objects: Shared values Utility methods Constants When to Use Non-Static? Use non-static when data is different for each object