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Articles by Alshifa Hasnain
Page 17 of 23
Parallel 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 ...
Read MoreInitialize an ArrayList in Java
In this article, we will learn to initialize an ArrayList in Java. The ArrayList class extends AbstractList and implements the List interface. ArrayList supports dynamic arrays that can grow as needed. Array lists are created with an initial size. When this size is exceeded, the collection is automatically enlarged. When objects are removed, the array may be shrunk. Different Approaches The following are the two different approaches to initialize an ArrayList in Java − Using add() Method Using asList() method Using add() Method One of the most frequent methods of ...
Read MoreCan we create a program without a main method in Java?
Java is a statically typed, object-oriented programming language that needs a main method as an entry point for running. But it is possible to develop Java programs without a main method under certain conditions. Different Approaches The following are the different approaches for creating a program without a main method in Java − Using Static Blocks Using a Servlet Using a JavaFX Application Using Static Blocks (Before Java 7) In previous implementations of Java (prior to Java 7), a program was possible to run with a ...
Read More3 ways to initialize an object in Java
In Java, objects may be initialized in various ways for different purposes. When a class is implementing the Cloneable interface, it opens up one more way of creating object instances. What is Cloneable Interface? Cloneable interface in Java states that a class can clone its objects. It enables the class to make a copy of itself using the clone() method. If the class is not Cloneable, the clone() method called on its object would throw an error. Different Approaches Consider a class Tester that has implemented a Cloneable interface. Now you can initialize an object using the following three ways ...
Read MoreGet the location of an element in Java ArrayList
In this article, we will learn to get the location of an element in Java. In Java, an ArrayList is used for storing and manipulating dynamic collections of elements. When working with an ArrayList, you might need to find the index (position) of a specific element. What is the indexOf()? The location of an element in an ArrayList can be obtained using the method java.util.ArrayList.indexOf(). This method returns the index of the first occurrence of the element that is specified. If the element is unavailable in the ArrayList, then this method returns -1. Syntax int index = arrayList.indexOf(element); Finding the ...
Read MoreJava Program for Cocktail Sort
In this article, we will learn to perform cocktail sorting in Java. Cocktail Sort, also known as Bidirectional Bubble Sort, is a variation of the standard Bubble Sort algorithm. What is Cocktail Sort? Cocktail Sort works in contrast to bubble sort, wherein elements are iterated from left to right, and the largest element is first brought to its correct position, and so on. In cocktail sort, elements are iterated over in both directions (left and right) in an alternating fashion. Cocktail Sort Working Following are the steps to perform cocktail sort in Java − Traverse ...
Read MoreJava DatabaseMetaData getURL() method with example
In this article, we will learn about the DatabaseMetaData getURL() method in Java. The DatabaseMetaData interface provides useful methods to obtain details about the database and the JDBC driver. One such method is getURL(), which returns the URL of the JDBC driver being used. What is the getURL() Method? The getURL() method in Java's DatabaseMetaData interface is used to retrieve the URL of the database to which the current connection is established. Syntax String dbUrl = metaData.getURL(); This method retrieves the URL of the underlying Database Management System and returns it in the form of a String variable. ...
Read MoreJava program to subtract 40 days from the calendar
In this article, we will learn to subtract 40 days from the calendar in Java. Working with dates is a frequent need in programming, and there are multiple methods of doing it in Java. One of the simplest approaches is to use the Calendar class to remove days from a date. Different Approaches The following are the two to subtract 40 days from the calendar in Java − Using the Calendar Class Using the LocalDate Class Using the Calendar Class The first approach utilizes the Calendar class, which is part ...
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