If you are doing some calculation in your Java application where precise value is required such as in financial operations you should not be using float or double primitive type. Same way if you want to store a very large number, for example if you are calculating factorial then again…
Abstract class in Java is a class that is declared using abstract keyword. Abstract class can have regular methods (methods with method body) as well as abstract methods (methods without method body and having abstract specifier). Table of contents General form of abstract class in Java When is abstract class…
Interface in Java helps to fully abstract the implementation of the class. Interfaces act as a contract for the class, detailing what methods can be invoked by any outside entity without actually providing what methods should do. The class implementing an interface has to provide the behavior (implement the methods…
The Java Shell or JShell is an interactive command line tool for learning the Java programming language and to test Java code. JShell is a Read-Evaluate-Print Loop (REPL), which evaluates declarations, statements, and expressions as they are typed and immediately shows the results. This way you don’t need to write…
If you want to repeat a String n number of times from Java 11 there is a repeat() method in String class to do that. public String repeat(int count)– Returns a string whose value is the concatenation of this string repeated count times. If this string is empty or count…
In this post we’ll discuss a feature called local variable type inference which is included in Java 10. A new reserved type name “var” is added in Java to define and initialize local variables. Note that var is not a keyword, it’s a reserved type name. So your existing variable…
In this post we’ll talk about one of the programming construct; Array in Java. Topics covered are how to declare an array, how to create and initialize an array, how to store elements in an array and how to access those elements using array indexes, types of arrays in Java.…
This post is about one of the basic question whether Java is pass by value or pass by reference. Though basic, this question causes some confusion mainly for objects passed as parameter. In this post let’s go through some examples to clarify the doubts and have a clear understanding of…
final keyword in Java can be used with a field, method or class. In whichever context you use final in Java, it restricts the access in some way. Final variable– If a field is declared as final its value can’t be changed once assigned. Final method– A method declared as…
Java string valueOf() method is used to convert values of different data types into their String representations. valueOf() methods in String class valueOf() method in Java String class is overloaded and has following variants- String valueOf(boolean b)– Returns the string representation of the boolean argument. If the argument is true,…
