Introduction Linux passwd command changes a user’s password. A user can only change his/her own password but the root/superuser may change any user’s password. Let’s look at the Linux man page to understand the usage of this command. This is done by typing in the following command: $ man passwd Passwords in Linux The traditional […]
Android CameraX OpenCV Image Processing
In this tutorial, we’ll be integrating OpenCV in our Android Application. We have already discussed the basics of CameraX here. So today, we’ll see how to run OpenCV image processing on live camera feed. Android CameraX CameraX which comes with Android Jetpack is all about use cases. Basically, a camera can be built using three […]
Java Modulo Operator – Modulus Operator in Java
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 […]
Linux date Command Examples
Unix/Linux date command is a command used for displaying the system’s date and time. In addition, the command can also be used to modify or set the system’s date and time. For one to change the operating system’s time and date, one must be logged in as the root user. In this guide, we examine […]
Linux rsync Command Examples
Rsync, short for remote sync, is a Linux command used for copying and synchronizing files, between 2 Linux systems. It works in such a way that any additional changes made to a file or directory are replicated on another Linux system. With Linux rsync command, you can seamlessly copy and synchronize backups locally and remotely […]
Python Machine Learning Libraries
What is Machine Learning? As the web is immensely growing with each day, analyzing data based on a pattern by human intervention is becoming challenging. To leverage this, computer programs are being developed that can analyze data. This allows computers to learn automatically to observe data, look for patterns and make better decisions without much […]
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 […]