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Object Oriented Programming Articles
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Rules For Variable Declaration in Java
In any programming language, variables serve as a container that is used to store values. Before actually using a variable we need to declare it first. We can’t give any random names or symbols to it, although Java provides almost all the letters and symbols available for human and machine use. We will explore the naming conventions and set of rules for variable declaration in Java through this article. Variable Declaration in Java When it comes to declaring a variable, we need to define its type first, then name of the variable and an optional value. We can declare ...
Read MoreStudent Grade Calculator using Java Swing
Swing is a framework of Java that is used to develop window based applications. It provides a rich variety of GUI (Graphical User Interface) components that are lightweight and platform independent. Some of the classes of GUI components are JLable, JButton, JFrame, JCheckBox and so forth. In this article, we will build a simple student grade calculator using the components of Java Swing. Steps to create Student Grade Calculator using Java Swing To develop this application follow these steps − Step 1 Open your Netbeans IDE and create a new Java Application through the following path − File -> ...
Read MoreSimple Bill Splitter Application using Java Servlets
Servlets are small java modules that are used on server side of a web connection to enhance the functionality of web server. All the methods and classes for creating a servlet are available in ‘javax.servlet’ and ‘javax.servlet.http’ packages. Hence, it is important to import them into your program before working with the servlet. In this article, we will develop a simple bill splitter application using Java Servlets. Before starting, make sure you have installed the NetBeans IDE and Apache Tomcat server. Steps to build Simple Bill Splitter To develop this application follow these steps − Step 1 Open your ...
Read MoreSeparators in Java
Separators are one of the building blocks of a Java program that helps us to differentiate the regions of the block of code and arrange groups of codes or statements. They help us in defining scopes of particular variables and methods. Have you ever missed a bracket while defining a method or semicolon at the end of a statement? We all do this silly mistake every time we code. In this article, we are going to explore the importance of these separators and what would be the consequences if we neglect them. Seperators available in Java Being a programmer we ...
Read MoreJava Program for Minimum product subset of an array
Array is a linear data structure that is used to store a group of elements with similar datatypes. It stores data in a sequential manner. Once we create an array we can’t change its size i.e. it is of fixed length. The problem statement states that for a given array we have to find the minimum product of its subset. In this article, we will try to find the solution to the given problem. Program for minimum product of subsets Example 1 Let’s try to understand the problem and possible solution through an example. For the above ...
Read MoreStreamCorruptedException in Java
In java, StreamCorruptedException occurs when problem is found with the data being read from or written to a stream. The problem may be the data we are reading or writing is in the wrong format or contains errors. If the format of given file is not correct. When stream has been closed unexpectedly or the data has been partially overwritten. In this article, we will talk about StreamCorruptedException with examples. But before moving on it is important to understand streams and few of its method that we are going to use in examples. Program to handle StreamCorruptedException Streams Stream ...
Read MoreSerializable Interface in Java
The Serializable interface provides the facility to serialize an object. It does not define any methods and member variables. When a class implements serializable interface it simply indicates this class and its sub-classes can be serialized. The serializable interface serves to achieve the Serialization and Deserialization of an object. In this article, we will discuss the use of Serializable Interface in Java with examples. Serialization and Deserialization in Java Serialization is a mechanism used to represent a given object into a sequence of bytes and its opposite is deserialization which represents a sequence of bytes into an object. Other ...
Read MoreSlicker Algorithm to Find the Area of a Polygon in Java
The term ‘Polygon’ originated from the Greek words ‘Poly’ which means ‘many’ and ‘gon’ which means ‘angle’. A polygon is a two dimensional closed plane shape created by connecting three or more than three straight lines. For example, triangle, quadrilateral, hexagon and so forth. Although there are many ways to find the area of a polygon in this article, we will use the slicker algorithm for this purpose. Slicker Algorithm to Find Area of a Polygon Slicker Algorithm Two facts you must know, First, according to mathematical convention the y-direction points upwards are always positive. Second, according to computer ...
Read MoreStackOverflowError in Java with Examples
When the stack ran out of space then StackOverflowError occurs. It is a runtime error indicating that JVM has run out of resources. The main reasons for this kind of error may be: Circular references, infinite Recursion or heavy application that utilizes more memory. In this article, we will discuss the above listed reasons for StackOverflowError in the simplest way possible. StackOverflowError in Java Memory Mnagement in java Before moving to the StackOverflowError it is important to know about how memory space managed by java for a particular program or application. Every interface, class, object, variable and method of a ...
Read MoreStrictMath subtractExact() in Java With Examples
In java, the subtractExact() is a static method of the class StrictMath. It is available in ‘java.lang’ package. In this article, we will discuss StrictMath and some of its inbuilt methods. We will also see the implementation of subtractExact() method and how it is different from other methods of this class. StrictMath Class in Java StrictMath is a final class that extends object class. We can use its methods without creating instance because all the methods of this class are static and we can call a static method without an object. To call a Static Mehtod Class_name.static_method_name To ...
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