The source files you create should be kept in a separate directory. You can change your current directory to your home directory at any time by typing cd at the prompt and then pressing Return. When you first bring up the prompt, your current directory will usually be your home directory. Or, you can use the following (longer) instructions.įirst, open a shell, or "terminal," window. Then, you can go straight to Compile the Source File. You can save the file HelloWorldApp.java on your computer and avoid a lot of typing.
To create a source file, you have two options: The Java application launcher tool ( java) uses the Java virtual machine to run your application. The Java programming language compiler ( javac) takes your source file and translates its text into instructions that the Java virtual machine can understand. You can use any text editor to create and edit source files.Ĭompile the source file into a. To create this program, you will:Ī source file contains code, written in the Java programming language, that you and other programmers can understand. Your first application, HelloWorldApp, will simply display the greeting "Hello world!". These two items are all you'll need to write your first application. You can easily adapt these instructions if you use a different text editor, such as vi or emacs. In this example, we'll use Pico, an editor available for many UNIX-based platforms. (Make sure you download the JDK, not the JRE.) Consult the To write your first program, you'll need:ĭownload the version for Solaris OS, Linux, or Mac OS X. If you encounter problems with the instructions on this page, consult the It's time to write your first application! These detailed instructions are for users of Solaris OS, Linux, and Mac OS X.
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