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Object Oriented Programming Articles
Page 262 of 588
Program to print Hut Star pattern
Solving interesting pattern problems enhances the understanding of loops. They are essential because they help in building a strong foundation of a particular programming language. There are various kinds of patterns including number-based, star-based and alphabetical patterns as well. This article will guide you to solve a hut star pattern using nested for loop in Java. Java Program to print Hut Star Pattern Since we are going to solve the problem using nested for loop therefore, it is necessary to discuss its syntax. Syntax for ( initial expression; conditional expression; increment/decrement expression ){ for ( ...
Read MorePublic vs Protected vs Package vs Private Access Modifiers in Java
Java has various levels of protection that allow precise control over the accessibility of member variables and methods within classes, subclasses, and packages. The access control mechanism works with the help of access modifiers such as public, protected, private and package. They define scope of a variable, class and method. We are going to understand the various access modifiers in Java. Access Modifiers in Java Public Access Modifier Java does not restrict the accessibility of public members. Anything declared public can be accessible everywhere means we can access them within the class as well as outside the class and ...
Read MoreProgram to validate a user using JSP
JSP stands for Java Server Pages and is used for the purpose of developing web based applications. A single JSP page consists of HTML tags for static content and JSP tags to construct dynamic content. The JSP tags start with ‘’. We save our JSP file with the extension ‘.jsp’. Validating a user means simply checking whether the user has entered correct login details or not. The validation process in JSP is quite simple and straightforward. This article will guide you to create a program to validate a user using JSP. Steps to create a Program to Validate a ...
Read MoreRandomly select items from a List in Java
List is the sub-interface of Java Collection Interface. It is a linear structure that stores and accesses each element in a sequential manner. To use the features of list, we use ArrayList and LinekdList class that implements the list interface. In this article, we will create an ArrayList and try to select items from that list randomly. Program to Randomly select items from a List in Java Random Class We create an object of this class to generate pseudorandom numbers. We will customize this object and apply our own logic to select any random items from the list. ...
Read MoreReading Text File into Java HashMap
HashMap is a class that is used to implement Map Interface. It stores its element in key-value pairs. The Key is an object that is used to fetch and receive value associated with it. It has access to all the methods of Map Interface, it does not have any additional methods of its own. Duplicate values are not allowed, although we can store null values and keys. In this article, we will try reading the content of a local text file into Java HashMap. Java Program to Read Text File into Java HashMap The general syntax for HashMap is as ...
Read MoreRecursive Constructor Invocation in Java
Recursive Constructor Invocation is a compile time error that occurs when a constructor calls itself. It is similar to recursion where a method calls itself as often as necessary. The method that calls itself is called as recursive method and the constructor that calls itself is called as recursive constructor. In this article, we will understand the Recursive Constructor Invocation error in Java with a few examples. Recursive Constructor Invocation Constructor It is quite similar to methods but the difference is that methods define the behavior of an object but constructor is used to initialize those objects. We can provide ...
Read MoreNon-blocking Server in Java NIO
Non-blocking Server Java NIO (New Input/Output) is a very powerful networking and file-handling application that functions as an alternative to Java's standard IO API. Due to the addition of more sophisticated features since JDK 4's introduction, it has quickly emerged as the preferred I/O system among numerous engineers. The improved support it offers for file handling and file system features is one of the features that distinguish Java NIO. Since the NIO file classes have such incredible capabilities, it is extensively used in file handling. If you look closely, you'll notice that java.nio package specifies the buffer classes employed by ...
Read MoreObject Model in Java
Overview of Object Model Have you ever thought about how software programs can see and communicate with the components that make them up? The object model is useful in this situation. Developers can represent those components as objects using sophisticated object-oriented techniques thanks to a strong system or interface. The object model is actually so crucial to software development that it's frequently one of the first stages. The object model establishes the framework for a reliable, adaptable, and scalable application design by defining crucial features like inheritance and encapsulation. Are you set to learn more about object-oriented programming? Objects and ...
Read MoreSimilarities between TreeMap and TreeSet in Java
The TreeMap and TreeSet, both are the part of Collection Framework classes. There exist a few differences as well as a few similarities in their implementation and working. The TreeMap maintains key-value pair on the other hand the TreeSet does not have this feature. In this article, we will discuss the similarities between both classes of Collection Interface. Collection Interface In Java, collection is an object or we can say a container for simplicity that allows us to group several numbers of objects in a single unit. The collection interface is present at the root of all collection framework interfaces. ...
Read MoreStandard Practice for Protecting Sensitive Data in Java
Every time we do surfing on the Web or we download any file from Web, we take a risk of a virus attack. Maybe that file contains some malicious code that can breach the security and gain unauthorized access to system resources. If we are building an application that has users’ sensitive data, for example, a banking system contains confidential data like credit and debit card details, addresses, email and so forth. Then securing those data becomes our foremost priority. In this article, we are going to discuss a few standard practices for protecting the sensitive data of users in ...
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