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Writing a java program on mac

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. 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. 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.

How to install Java JDK on Mac OS X ( with JAVA_HOME )

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.

Your First Cup of Java (for Mac OS)

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. 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. 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.

Unjar JavaSoundDemo. For larger or more complicated applications you are likely to have more than one jar file along with resource files. A common strategy for targeting multiple platforms is to include a batch file and a shell script.

Hello World in Java on Mac OS X

Choose the non-platform specific download from the NetBeans homepage. Inside of the bin subdirectory you will find applications for running NetBeans on a variety of platforms. The shell script runide. You could, of course, modify the shell script to modify this look and feel, but the NetBeans developers decided on a different approach. Even though the typical NetBeans audience member is technically competent, there should be a friendlier way to start the IDE.

The version of NetBeansLauncher that is included in the generic NetBeans download is a good next step. You will see how the team took it farther in the next section. This is a disk image. Drag the NetBeansLauncher from the expanded disk image back into the bin directory. Now double click on the NetBeansLauncher. The ReadMe file that was also in the disk image provides the following information about usage. For this download, the first time the user starts up the NetBeansLauncher , they need to navigate to the netbeans directory.


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  • First Class Mac OS X Applications;

If you download the Mac OS X disk image from the NetBeans distribution and mount it you may be surprised at the simplicity of what you find. Unlike the complex structure visible in the other distributions, you will see five files with documentation and a single application. To install, you can move this NetBeansLauncher application anywhere on your hard drive. This is the experience that is expected on Mac OS X. The package structure and complexity is hidden from the user and they can't accidentally move a file that renders the IDE unusable.

In this section we'll look more closely at the package structure and how to create a Mac OS X application whether or not our build machine is a Mac. The structure is the same for all Mac OS X applications. There is a Contents directory with an XML file named info. If you don't have a creator code registered with Apple the PkgInfo text file should contain only the following.

If you have a creator code, use it in place of the question marks. In this case the NetBeans team has written their own application. We will look more closely at a property list file in the next section. For now, take a look at the contents of the Resources directory. You can see the contents of the same netbeans package inside of the Resources subdirectory.

This is your key to deploying on Mac OS X.


  1. mac keyboard option key on windows keyboard.
  2. macos - How do I compile and run a program in Java on my Mac? - Stack Overflow.
  3. Hello, World in Java on Mac OS X?
  4. Instructables.
  5. Hello, World in Java on Mac OS X.
  6. Bringing your Java Application to Mac OS X Part Three.
  7. Using the Compiler.
  8. Add in the necessary pieces and then just bundle up your ordinary distribution in the appropriate location. If you have a more flexible build process you should also strip out those pieces that aren't needed for the Mac OS X application such as the Windows executables. If you are interested in digging deeper into the structure of a Mac OS X application, you will find more information in the Apple publication Anatomy of a Bundle. Open the application called TextEdit.

    Click on Finder , Applications , then click on the TextEdit application. Open a new document. First you must configure the text editor for java code.

    On the menu bar on the top left corner of your screen, click on TextEdit , then Preferences. Uncheck the Smart quotes box under the Options section towards the bottom of the preference window. Switch to the Open and Save tab. The first step in writing your program is to create a class called HelloWorld. In object oriented programming, a class is a template for an object. An object is an instance of a class. For reference, you can think of a class as the blueprints of a house, and an object as the house itself. The key words public class creates a new class.

    HelloWorld is the name of your class. Everything placed inside the brackets following HelloWorld will be included in the class.

    Your First Cup of Java (for Mac OS)

    Next, create a function in your HelloWorld class called main. When the computer executes your program, it will perform the instructions inside the brackets of the function called main. The key words public static void will create a function that can be accessed by your computer. When the program executes, it will only perform the instructions inside the brackets of the main function.

    All functions in java are followed by a set of parenthesis. Some functions in java have a variable inside the parenthesis called a parameter. The parameter inside of the parenthesis following the main function, String[ ] args , represents data that can be supplied to the program by the user when executing the program. For this project, you will not be supplying any data to the program.

    The final step in writing your code is to define the main function in you HelloWorld class.

    The instructions inside the brackets of the main function will tell your computer what to do when it executes the program. For this program, you want the computer to print the words "Hello World! The java instruction. Inside the braces of the main function in the HelloWorld class, write the instruction. Be sure the words that you want the program to print to your console are placed inside quotation marks.

    Place a semi-colon at the end of your instruction to show that the instruction on that line of code has ended. This step concludes the coding portion of the tutorial. Your program should look similar to the program in the image above. The indentations are not necessary for the functionality of your program, but they are recommended to make you code more readable. Save your computer program to your Desktop. On the menu bar on the top left corner of your screen, click on File, Save. Save your computer program as.

    Be sure that the file name is the same name as your class and that the TextEdit application encodes your file to Unicode UTF Next, compile your program using the java compiler included on Mac OS X operating systems. You can compile your computer program using your terminal.