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Java Articles
Page 249 of 450
Swapping items of a list in Java _ Collections.swap() with Example
This article will provide an in-depth explanation of how to swap items in a list using the Collections.swap() method in Java. This topic is crucial for anyone looking to strengthen their data manipulation skills in Java, especially in dealing with list data structures. Java provides an extensive suite of tools for manipulating collections, including lists. One of these tools is the Collections.swap() method, which allows developers to easily swap the positions of two elements in a list. This method can be extremely handy when you need to rearrange elements in a list for various purposes, such as sorting, shuffling, or ...
Read MoreSwap Corner Words and Reverse Middle Characters
In this article, we'll delve into a fascinating string manipulation problem that involves swapping corner words of a string and reversing the middle characters. This kind of problem is quite common in coding interviews, and it's a great way to enhance your understanding of string manipulation in Java. Java provides a rich set of tools for string manipulation. From basic operations such as concatenation and comparison to more complex tasks such as string reversing and swapping, Java's String API can handle it all. One intriguing problem is to swap the corner words of a string and reverse the middle characters. ...
Read MoreSum of Array Divisible by Size with Even and Odd Numbers at Odd and Even Index in Java
Understanding how arrays work is fundamental for any developer, and Java is no exception. Arrays in Java are objects that store multiple variables of the same type. However, arrays can often be used in more complex ways. One such instance is when you need to figure out if the sum of an array, considering only even numbers at odd indices and odd numbers at even indices, is divisible by the size of the array. In this article, we will guide you step-by-step on how to solve this problem. Problem Statement Given an array of integers, write a function in Java ...
Read MoreRules 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 ...
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