In Java, there are two ways of argument passing. Call by value Call by reference Call by value Whenever we call a method and passes the value of the variable to the called method, it’s called call by value. class Demo { void set(int i, int j) { i = i * 2; j … Read more
Local Variable Hides Instance Variable In java when the local variable has the same name as an instance variable, the local variable hides the instance variable. public class Test { int a=10, b=10;// instance variable a,b public static void main(String agrs[]) { Test t = new Test(); t.display(); } public void display() { int a … Read more
A Constructor in a special method that is used to initialize the object. Constructor name should be same as class name. Constructors does not have any return type. public class Student(){ //constructor Student(){ } } While creating object of above class we use Student student=new Studet() Here new is used to create object and after … Read more
Class A class forms the basis for object-oriented programming. It defines the shape and nature of the object. Any concept that we want to implement in oop’s must be encapsulated within a class. A class is a template for an object and an object is an instance for a class. In another words class is … Read more
Java contains 53 reserved words out of which 50 are keywords. Out of 50, only 48 keywords are used and two keywords const and goto are not in use, and 3 are literals values true, false, and null. These reserved words can not be used as identifiers. Java Keywords The keyword is a reserved word that … Read more
