Mac Terminal Commands For Compiling Java

Type the following commands into the terminal: cd ~ javac HelloWorld.java You just compiled your first Java application, albeit a simple one, on OSX. The process of compiling will produce a single file, called 'HelloWorld.class'. This file contains Java byte codes, which are the instructions that the Java Virtual Machine understands. I also had a second problem (I had to remove package hello;), hence 'trying to compile a java program in terminal'—terminal wasn't the only problem. The java part was also wrong, so idk if it's an exact duplicate. – royhowie Aug 21 '13 at 1:46.

I assume that you mean the output of your Java program is garbled when you compile it on Mac OS. You need to make sure that either A) the character encoding of your source file is the same as that used by your workstation (most IDEs do this by default), or B) you specify the -encoding option of javac to match the file's character encoding. If that doesn't fix the problem, when you are running java, make sure that the system property 'file.encoding' is set to the character encoding using the command line option -Dfile.encoding=. Note that setting this in your program with System.setProperty will not work.

The value is read during startup of the JVM and cached. Changing it later will not affect the console output.

By October 2003 In the past two articles you have seen how to customize your Java application so that it looks and feels more like a native Macintosh application when running on Mac OS X without changing the end user experience on other platforms. A combination of runtime properties and coding changes that targeted Mac OS X specific APIs made a big difference to that audience. Recall that Mac OS X is a melding of two worlds.

Hard core UNIX programmers can pop open a Terminal window and write their Java code using vi and compile and run it from the command line. There is, however, the more traditional Mac audience that interacts with their computer through a friendly UI that follows Apple Human Interface guidelines.

In this article, we look at deploying your Java application. The technical geek audience might be happy with running a class with a main() method from the command line but the wider audience expects a double-clickable icon that looks and acts like every other native application.

In this article, we travel from one end of the spectrum to the other to broaden your potential user base. Although you should 'test everywhere', your build machine may not be a Mac.

Fortunately, as you will see, a double-clickable Macintosh application is just a directory with some special contents and a name that ends with.app. Even on a Windows machine you should be able to modify your build script to package up a Mac-specific version of your application. Primitive Distributions Because Mac OS X ships with J2SE 1.4.1 and J2SE 1.3.1, you can distribute your application as class files or jar files and - in theory - your customer could run your application from the Terminal application. We start with these models and quickly move to double-clickable jar files and shell scripts. For this article, use the as the running example. Download and unzip the zip file.

Inside the JavaSoundDemo directory you will find the source files inside of the src subdirectory, a jar file, audio files, and html files that we will not use. Raw Class Files As a developer, you don't think twice about compiling the source files and running the application using the command line. Compiling the eight files in the src directory generates fifty class files. You can then run the sample application from the command line like this.

Java JavaSound The Java Sound Demo starts up. We haven't customized the application in any way so the menu appears at the top of the JFrame and not where Macintosh users expect.

The application looks like this out of the box. (Click image to enlarge.) You have done this compile and run step so many times that you hardly think twice about it. Think of the least technical person you know and ask whether they would be likely to follow these steps to run your application if a competing application were easier to install and run.

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This example demonstrates two separate areas of usability. Once we got the application up and running it looked good and ran fine. You would not, however, want to distribute an application to an end user this way. You would have to somehow bundle up the fifty class files for easy download and installation. You would then have to provide instructions for running the application using, in the case of Mac OS X, the Terminal application. Jar Files If you are going to have to package up the class files for distribution anyways, you may as well produce a jar file.

And, if you are going to produce a jar file, it ought to be executable. In the case of the Java Sound Demo, the file JavaSoundDemo.jar is executable. Because Mac OS X ships with the Jar Launcher application, the end user needs only double click on the jar file and the application will launch. To make the jar file executable, the manifest must include the name of the Main class file.