In this tutorial we’ll learn about String in Java which is one of the most important and extensively used class in Java. Java String String in Java is a sequence of characters and it is represented by String class residing in java.lang Package. Whenever you create a String in Java…
Java 8 onward a new feature has been added to the interface in Java known as default method in Java interface. With the inclusion of default methods, an interface in Java can have a default implementation for a method. Note that in a normal traditional form of interface all the…
A package in Java is used to group a set of related classes and interfaces. In a big Java application containing hundreds or thousands of individual classes, grouping related classes and interfaces into packages helps to keep things organized. Package structure in Java Packages follow the same structure as directories…
In Java programming language when you create a class it contains variables and methods. In this tutorial we’ll learn about Java methods. In the post Writing First Java Program we have already seen one method; main method which begins the execution of the program. Table of contents Methods in Java…
A primitive type is predefined by a programming language and is named by a reserved keyword. The primitive types represent single values not an object and primitive values do not share state with other primitive values. There are eight primitive data types in Java which are as follows- byte short…
Variables are used to store values that are used in your Java program. A Java variable is a name to a memory location that contains the value assigned to that variable. In this post we’ll see how to declare and initialize a variable in Java, types of variables in Java…
In this post we’ll see the differences between shallow copy and deep copy in Java object cloning. To understand the differences it is very important to understand the concept of shallow copy and deep copy while cloning an object so first we’ll try to understand the concept using examples of…
Object cloning in Java is the process of creating a copy of an object. To clone an object in Java clone() method of the Object class is used. Table of contents clone() method Cloning an object in Java using clone() method Examples of Java object cloning Advantages of object cloning…
This post shows what does “Cannot make a static reference to the non-static method or a non-static field” error means and how to fix that error. static reference to the non-static field or method error In order to understand why this error crops up you’ll have to understand the difference between…
Static block in Java is used to initialize the static variables (also known as class variables). To initialize instance variables there are constructors, where error handling or other logic can be used. To provide the same capability for class variables, there are static initialization blocks in Java. Syntax of Java…
