what is static method
A static method belongs to the class rather than the object.
There is no need to create the object to call the static methods.
A static method can access and change the value of the static variablewhat is static method
A static method belongs to the class rather than the object.
There is no need to create the object to call the static methods.
A static method can access and change the value of the static variablewhat is static variable
The static variable is used to refer to the common property of all objects
(that is not unique for each object),
e.g., The company name of employees, college name of students, etc.
Static variable gets memory only once in the class area at the time of
class loading. Using a static variable makes your program more
memory efficient (it saves memory). Static variable belongs to the class
rather than the object.static data and static methods in java
class JavaExample{
private static String str = "BeginnersBook";
//Static class
static class MyNestedClass{
//non-static method
public void disp() {
/* If you make the str variable of outer class
* non-static then you will get compilation error
* because: a nested static class cannot access non-
* static members of the outer class.
*/
System.out.println(str);
}
}
public static void main(String args[])
{
/* To create instance of nested class we didn't need the outer
* class instance but for a regular nested class you would need
* to create an instance of outer class first
*/
JavaExample.MyNestedClass obj = new JavaExample.MyNestedClass();
obj.disp();
}
}Static Variable
//Static variable
If you declare any variable as static, it is known as a static variable.
The static variable can be used to refer to the common property of all objects (which is not unique for each object), for example, the company name of employees, college name of students, etc.
The static variable gets memory only once in the class area at the time of class loading.
Advantages
It makes your program memory efficient (i.e., it saves memory).
Example
//Java Program to demonstrate the use of static variable
class Student{
int rollno;//instance variable
String name;
static String college ="ITS"; //static variable
//constructor
Student(int r, String n){
rollno = r;
name = n;
}
//method to display the values
void display (){System.out.println(rollno+" "+name+" "+college);}
}
//Test class to show the values of objects
public class TestStaticVariable1{
public static void main(String args[]){
Student s1 = new Student(111,"Karan");
Student s2 = new Student(222,"Aryan");
//we can change the college of all objects by the single line of code
//Student.college="BBDIT";
s1.display();
s2.display();
}
}Copyright © 2021 Codeinu
Forgot your account's password or having trouble logging into your Account? Don't worry, we'll help you to get back your account. Enter your email address and we'll send you a recovery link to reset your password. If you are experiencing problems resetting your password contact us
