The jar command is a lot like the tar command, so many of the options may look familiar: $ jar cfme Guess.jar \įrom the syntax of the command, you may surmise that it creates a new JAR file called Guess.jar with its required manifest data located in Manifest.txt. You're all set to package your application into a JAR (Java archive). This produces a file called Main.class in com/example/guess: $ javac src/Guess.java -d com/example/guess Next, compile your game into a Java class. ('number is ' + String.valueOf(NUMBER)) //DEBUG Private static final int NUMBER = r.nextInt(100) + 1 Private static final Random r = new Random() It's a great practical experiment for learning a new programming language. This 'guess the number' program exercises several concepts in programming languages: how to assign values to variables, how to write statements, and how to perform conditional evaluation and loops. If you don't have it, check out these links to install Java on Linux, macOS, or Windows.Īfter installing it, run this Java command in a terminal to confirm the version you installed: $ java -version Guess the number To do this exercise, you must have Java installed. In this article, I demonstrate how to create a simple guessing game in Java. I've found that simple games are both fun to write and useful in exploring a language's abilities. Free online course: Developing cloud-native applications with microservices architectures.
