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Articles by Alshifa Hasnain
Page 12 of 23
Difference between List and Set in Java
In Java, List and Set are both interfaces that belong to the Collection framework. Both interfaces extend the Collection interface. They are both used to store a collection of objects as a single unit. Before JDK 1.2, we used to use Arrays, Vectors, and Hashtable for grouping objects as a single unit. Difference Table The following are the key differences between List and Set − Sr. No. ...
Read MoreWhat is the character wrapper class and its methods in Java?
In this article, we will learn about the character wrapper class and its methods in Java. The Character class is the primitive char type wrapper, providing useful methods for manipulation, classification, and conversion of characters. The Character Wrapper Class The Character class of the java.lang package wraps a value of the primitive datatype char. It offers a number of useful class (i.e., static) methods for manipulating characters. You can create a Character object with the Character constructor. Syntax Character ch = new Character('a'); Various Methods in the Character Class The following are some of the methods used in the ...
Read MoreWhat is the purpose of private constructor in Java?
In this article, we will learn about the purpose of private constructor in Java. Constructor is a unique method used to initialize objects. Constructors are public or protected by default, which allows outside classes to create instances Why Use a Private Constructor? Private constructor is mainly applied to manage object creation. It does not allow other classes to instantiate the class, creating particular design patterns or restrictions. Purpose of a Private Constructor The private constructor is useful in case we want to restrict the object creation. For example − Singleton pattern can be implemented using ...
Read MoreShould I include type=\'text/javascript\' in my SCRIPT tags?
The type attribute in JavaScript is optional since the introduction of HTML5 brought some new improvements. JavaScript became the default language for HTML5 and modern browsers. So, now adding text/javascript isn’t required in tag. This attribute is what is now recommended to indicate the scripting language in use and its value should be set to "text/javascript". Example Here you can see how it is used: Output
Read MoreHow to declare a static String array in Java
In this article, we will learn the declaration of static Strings array in Java. Arrays can be used to store multiple values in one variable. Static array has a specific size which cannot be increased in the later part of the program after creation. What is a Static String Array? A static array is a declared array as static, which means that it is associated with the class, not with a class instance. This brings the array into a shared state among all instances of the class. Static variables are loaded when the class is loaded, even before class instances ...
Read MoreJava program to merge two files into a third file
In this article, we will learn to merge two files into a third file in Java. Combining the contents of two files into a third file is a typical operation in file handling, frequently needed to aggregate data. Java offers efficient facilities such as BufferedReader and PrintWriter to accomplish this easily. ApproachThe following are the steps to merge the contents of two files into a third file in Java− Read the contents of the first file line by line using a BufferedReader. Write each line to the third file using a ...
Read MoreNon-generic Vs Generic Collection in Java
In this article, we will learn about the collections in Java. The collections are used to store and manipulate groups of objects. Java collections can be broadly classified into two types − Non-generic Collections (Before Java 5) Generic Collections (Introduced in Java 5) Non-generic collections allow storing objects of different types leading to runtime errors. On the other hand generic collections enforce type safety at compile-time, reducing the risk of type-related errors. Non - Generic Collection When the data structure is non-generic, it causes issues when the data is tried ...
Read MoreParallel Data Processing in Java
In this article, we will learn about Parallel Data Processing in Java. Parallel processing of data is important to increase performance, particularly for large amounts of data. Java has its own built-in ways to accomplish things in the background, fully using multi-core processors. Different Approaches The following are the two different approaches for parallel data processing in Java − Using Java Streams API Using Arrays.parallelSort() Why Parallel Processing? Parallel data processing is essential in scenarios where − Processing large datasets is necessary to happen ...
Read MoreMultidimensional Collections in Java
In this article, we will learn about multidimensional collections in Java. These collections offer dynamic resizing, flexible data storage, and better memory management compared to traditional arrays. What are Multidimensional collections? Multidimensional collections are also known as Nested collections. It is a group of objects wherein every group has any number of objects that can be created dynamically. They can be stored in any position as well. In the case of arrays, the user would be bound to a specific number of rows and columns, hence multidimensional structure helps create and add elements dynamically. Different Approaches The following are the ...
Read MoreC++ Program to Create Custom Exception
In this article, we learn to create custom-made, user−defined exceptions in C++. Exceptions are a core concept of C++. They occur when an unwanted or impossible operation occurs during execution. Handling these unwanted or impossible operations is known as exception handling in C++. What is Exception Handling? Exception handling is mainly done using three specific keywords: ' try’, ‘catch’, and ‘throw’. The ‘try’ keyword is used to execute code that may encounter an exception, the ‘catch’ keyword is used to handle such exceptions, and the ‘throws’ keyword is used to create an exception. Exception Types Exceptions in C++ can be divided ...
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