Installing the Java JDK on OS X
To install the Java JDK on OS X, you will need to open up an internet browser and navigate over to here. When you get there, you will need to accept the licence agreements and then click the download button next to where it says Mac OS X x64.
When this has downloaded, you will need to open the .dmg file. This should then open a window like this. All you have to do is double click the image. This should then start the install. Just follow the instructions and then your done.
You can check to make sure it has installed correctly by opening a terminal window
Once you have opened the terminal, simply type
and press enter. You should see something like the following. Dont worry, this has what is expected. You can now go to Lesson 1