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Installing Java on Mac OS X Lion

From: Java Essential Training

Video: Installing Java on Mac OS X Lion

If you are working on Mac OS X version 10.7 or Lion, you'll find that Java is not installed by default on this version of the operating system. It's up to you to go get Java and install it. This is pretty easy to do, just go to the Apple website at this URL, support.apple.com/kb/DL1421. Click the Download link and follow the prompts to download the software. I've downloaded the installer to my desktop.

Installing Java on Mac OS X Lion

If you are working on Mac OS X version 10.7 or Lion, you'll find that Java is not installed by default on this version of the operating system. It's up to you to go get Java and install it. This is pretty easy to do, just go to the Apple website at this URL, support.apple.com/kb/DL1421. Click the Download link and follow the prompts to download the software. I've downloaded the installer to my desktop.

It's a dmg file and when you open it up it shows a conventional installer package. Run the installer and walk through all the prompts to install Java. There are no options to take care of, so the installation is fairly automated. This version of the installer is for Java SE 6, 1.6.0.26, the latest version of Java for Mac as of this recording. Once you've completed the installation the next step is to test it. I recommend using Terminal for this. I'll go to the Lion Launchpad application which opens up my applications.

I'll go to Utilities and then to Terminal. Now to test the installation of Java, first type java, all lower case, then a space and -version, press return and you should see an output showing you which version of Java is installed on your system. Again I am running Java 6 maintenance release 26. You should also test to make sure you can get to the Java compiler type javac space -version and once again you should get a little bit of output. This time just showing the version number.

If you can do this much you are in great shape and you are ready to go to the next step installing Eclipse, but before you finish up this video, I'll show you where Java is actually installed. You'll need to know this location for certain configurations tasks during this video course. In Terminal from the command line type cd space /System, make sure that you are using an uppercase S because Mac OS X is case sensitive, then /library, then /frameworks.

Press Return and the type ls Ja* and that will show you a listing of everything starting off with the word Java. I am looking for the items at the bottom of the listing under JavaVM. Framework so I'll type cd then JavaV, with an uppercase V, and I'll press tab and let Terminal auto complete the directory name. I'll press Return then I'll issue the Clear command to clear the screen and then ls to see what's in here.

You'll see that there are directories for Classes, Frameworks, JavaVM and so on. The directory you are interested in is commands. So I'll type cd space Commands and return and then ls and there are all the Java commands including Java, javac, javadoc and many, many others. Again you'll need to know this particular directory location later on in the course when you configure Eclipse to tell it where certain tools are such as the javadoc command.

So now you have installed Java, you've tested it to make sure you can run both the Java Virtual Machine and the compiler and you've seen where the Java files are installed and you are ready for the next step in the process installing Eclipse on your system.

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This video is part of

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Java Essential Training

71 video lessons · 68665 viewers

David Gassner
Author

 
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  1. 10m 8s
    1. Welcome
      1m 3s
    2. Is this course for you?
      5m 35s
    3. Using the exercise files
      3m 30s
  2. 31m 24s
    1. The history of Java
      5m 19s
    2. Java compilation and syntax
      8m 54s
    3. Understanding the principles of Java
      8m 28s
    4. Choosing a development environment
      8m 43s
  3. 19m 5s
    1. Installing Java on Windows
      6m 42s
    2. Installing Eclipse on Windows
      3m 19s
    3. Exploring Java on Mac OS X Leopard and Snow Leopard
      2m 27s
    4. Installing Java on Mac OS X Lion
      3m 27s
    5. Installing Eclipse on Mac OS X
      3m 10s
  4. 46m 10s
    1. Creating a Hello World application
      11m 7s
    2. Exploring the Eclipse IDE
      8m 55s
    3. Compiling and running from the command line
      8m 2s
    4. Passing arguments to the application
      8m 17s
    5. Using the Java API documentation
      4m 5s
    6. Memory management and garbage collection
      5m 44s
  5. 58m 57s
    1. Everything is an object
      5m 59s
    2. Declaring and initializing variables
      9m 15s
    3. Working with numbers
      8m 32s
    4. Converting numeric values
      6m 40s
    5. Understanding operators
      7m 58s
    6. Working with character values
      5m 14s
    7. Working with boolean values
      5m 13s
    8. Outputting primitive values as strings
      5m 33s
    9. Creating a simple calculator application
      4m 33s
  6. 53m 40s
    1. Writing conditional code
      5m 35s
    2. Using the switch statement
      8m 50s
    3. Repeating code blocks with loops
      7m 35s
    4. Creating reusable code with methods
      6m 31s
    5. Declaring methods with arguments
      5m 41s
    6. Overloading method names with different signatures
      5m 53s
    7. Passing arguments by reference or by value
      5m 35s
    8. Creating a more complex calculator application
      8m 0s
  7. 20m 30s
    1. Using the String class
      5m 44s
    2. Building strings with StringBuilder
      3m 34s
    3. Parsing string values
      3m 19s
    4. Working with date values
      7m 53s
  8. 20m 44s
    1. Understanding compile-time vs. runtime errors
      4m 5s
    2. Handling exceptions with try/catch
      4m 55s
    3. Throwing exceptions in methods
      2m 50s
    4. Using the debugger
      8m 54s
  9. 32m 22s
    1. Using simple arrays
      4m 47s
    2. Using two-dimensional arrays
      6m 17s
    3. Managing resizable arrays with ArrayList
      7m 14s
    4. Managing unordered data with HashMap
      6m 5s
    5. Looping through collections with iterators
      7m 59s
  10. 52m 2s
    1. Understanding encapsulation
      5m 59s
    2. Creating and instantiating custom classes
      8m 8s
    3. Organizing classes with packages
      6m 47s
    4. Creating and using instance methods
      6m 52s
    5. Storing data in instance variables
      6m 56s
    6. Using constructor methods
      5m 40s
    7. Managing instance data with getter and setter methods
      8m 26s
    8. Using class variables and Enum classes
      3m 14s
  11. 41m 15s
    1. Understanding inheritance and polymorphism
      9m 12s
    2. Extending custom classes
      9m 1s
    3. Overriding superclass methods
      3m 8s
    4. Casting subclass objects
      5m 3s
    5. Understanding interfaces and implementing classes
      4m 2s
    6. Creating your own interfaces
      4m 14s
    7. Using abstract classes and methods
      6m 35s
  12. 32m 17s
    1. Managing files with the core class library
      7m 46s
    2. Managing files with Apache Commons FileUtils
      7m 32s
    3. Reading a text file from a networked resource
      7m 52s
    4. Parsing an XML file with DOM
      9m 7s
  13. 17m 39s
    1. Creating your own JAR files
      4m 54s
    2. Understanding the classpath
      5m 2s
    3. Documenting code with Javadoc
      7m 43s
  14. 47s
    1. Goodbye
      47s

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