The Static Keyword

///A static variable is used when it is known that all objects of a class will have the same value for an attribute, such as the name of a college of a set of students from TSEC. It gets memory only once in class area at the time of class loading.
//A static method belongs to a class, not an object of the class. So, it can be invoked without an object. It can access and modify static data.
//A static block/initializer is a block of code which is initialized when class is loaded. It can be called a class constructor.
class Student{
        static{System.out.println("Hello Student!");} //static block
        int roll_no;
        String name;
        static String college = "TSEC"; //static variable

        Student(int roll_no, String name){
                this.roll_no = roll_no;
                this.name = name;
        }
}
class testHello{
        public static void main(String args[]){ //static method
                Student s1 = new Student(103, "Shail");
                Student s2 = new Student(105, "Alice");
                System.out.println("Name: "+s1.name+"\nRoll No: "+s1.roll_no+"\nCollege: "+s1.college);
                System.out.println("Name: "+s2.name+"\nRoll No: "+s2.roll_no+"\nCollege: "+s2.college);
        }
}
/*Output:-
C:\Java>java testHello
Hello Student!
Name: Shail
Roll No: 103
College: TSEC
Name: Alice
Roll No: 105
College: TSEC
*/