Java Modulo operator or modulus operator is used to getting the remainder when we divide an integer with another integer. Java Modulo Operator Syntax The % character is the modulus operator in Java. Its syntax is: int remainder = int % int The modulus operator always returns an integer. If we try to use the […]
Java Custom Exception – User Defined Exceptions
Custom Exceptions or User-Defined Exceptions are very common in Java applications. We can easily create custom exception classes for different use cases. What are the different types of Exceptions? In Java, there are two categories of Exceptions: Checked Exceptions – These are recoverable. These are derived from the Exception class. For example, IOException and FileNotFoundException […]
Java SPI (Service Provider Interface) and ServiceLoader
Java SPI (Service Provider Interface) is the mechanism to load services dynamically. We can implement Java SPI in our application by following the specific set of rules and load the services using the ServiceLoader class. Java SPI Components There are four components in the SPI implementation. Service Provider Interface: An interface or abstract class that […]
java.util Package in Java
The java.util package is part of java.base module. This package contains the most important APIs and classes in Java. Contents of java.util Package Java util package contains the following classes and APIs: Collections Framework Concurrent Classes Functional Interfaces Regex Classes Stream API ZIP API Internationalization Support Classes Service Loader Properties API Random Number Generation API […]
TinyLog – Lightweight Java Logging Framework Tutorial
TinyLog is a simple and lightweight logging framework for Java. We can use tinylog with Java, Kotlin, Scala, and Android applications. Benefits of TinyLog Logging Framework Avoids boiler-plate code of Logger initialization. The Logger class in tinylog is static and used directly to log messages. Support for other popular JVM languages such as Kotlin and […]
Java synchronized Keyword, Synchronized Method and Block
Java synchronized keyword is used in multithreading to create a code block that can be executed by only one thread at a time. Why do we need Synchronization? When we have multiple threads working on a shared entity, the end result might be corrupt. Let’s say we have a simple program to increase the counter […]
Java this Keyword
What is ‘this’ Keyword in Java? Java this keyword returns a reference to the current Object. We can access object variable, call the method or constructor of the current object using this keyword. Java ‘this’ keyword can be used to refer to any member of the current object from within an instance method or a […]
Java try-catch Examples
Java try-catch block is used to handle exceptions in the program. The code in the try block is executed and if any exception occurs, catch block is used to process them. If the catch block is not able to handle the exception, it’s thrown back to the caller program. If the program is not able […]
Linked List Insert Delete Methods
Linked List Insert Methods Linked List insert methods allow us to insert a Node at a specific place. There are three insert methods based on the position where the new node is inserted. addLast addFirst addAt 1. addLast As the name suggests, the new node is appended at the last position of the Linked list. […]
Introduction to Linked List (Java implementation)
A linked list is a linear data structure that contains a sequence of elements such that each element has reference to the next element in the sequence. Each element in the linked list is called “Node”. Each Node contains a data element and a Node next which points to the next node in the linked […]