How to generate a random number in Java

If you need to generate a random number in the Java programming language, then this article may help you. Please review the following sections to learn how to use the standard Java API to get a random integer, float or double value. Also, there are methods that allow you to generate arrays with random values. …

How to compare two strings in Java

This tutorial may be helpful if you need to compare two strings in the Java programming language. This is a very simple task. You just have to use a special method that will check if the string values are equal. However, the Java language provides many different methods that can be used for that purpose. …

How to change user in Linux terminal

Linux is a multi-user operating system. It allows the user to perform various operations with system resources. For example, you can manage groups, add or remove users, modify file permissions and so on. As a result, there may be a situation when you need to change the current user. You may want to run a …

How to copy directory in Linux

This article explains how to copy a directory in the Linux terminal. That's a very simple operation. In most cases, you can use the regular "cp" command. But it may require using some additional flags if you want to copy the whole directory. Also, at the end of this article, we will describe how the …

How to unzip a file in Linux terminal

This article will give you detailed instructions on how to decompress a zip file in a Linux terminal. That's a very simple operation and can be done with just a single command. For that purpose, we can use the "unzip" tool. There is a chance that it's already installed on the system that you have. …