Week 5 Quick Updates

I just wanted to let you all know that I fixed Eclipse (with some help).
Here was the error that was listed when trying to open Eclipse, found in the Configuration file of the Eclipse folder (please click on the picture if you have trouble viewing the error).

This is the important part: java.lang.UnsatisfiedLinkError: Cannot load 64-bit SWT libraries on 32-bit JVM. This is basically saying that the system cannot load the Eclipse Standard Widget Toolkit (this particular one is 64-bit) on a 32-bit Java Virtual Machine. When Eclipse is downloaded, both a 32-bit JVM and a 64-bit are downloaded. A 64-bit is downwards compatible with 32-bit but not vice versa. Sometimes you intentionally use a 32-bit for developing certain programs. That is why it is necessary for Eclipse to download both 64 and 32-bit JVMs. Sometimes when installing other Java-based products, they may change your path and could result in a different Java VM being used when you next launch Eclipse. I'm pretty sure that in my case, the "other Java-based product" was Android Studio. 

To fix this issue, you need to fix the target JVM in Eclipse.

To create a Windows shortcut to an installed Eclipse:

1. Navigate to eclipse.exe in Windows Explorer and use Create Shortcut on the content menu.

2. Select the shortcut and edit its Properties. In the Target: field append the command line arguments.

This is a typical command line argument: eclipse -vm c:\jdk6u22\jre\bin\javaw

The following is what I changed my target to (the highlighted portion is what I added):

E:\Programs\EclipseForAndroid\adt-bundle-windows-x86_64-20140702\eclipse\eclipse.exe -vm "C:\Program Files\Java\jdk1.7.0_05\bin"

Note the quotes around C:\ ... bin. This is because there is a space between the words Program and Files in the file name "Program Files". As this is an auto generated file, you should not just change the name of the File, but instead add quotes around the intended command line. If quotes are not added then the system throws and error that "C:\Program" was not found. 

In addition, I downloaded the newest version of Eclipse, Mars. I still have Juno to use for other projects; however, I installed Eclipse Mars because I wanted to install the Scala IDE and the newest IDE (4.3.0 Release) supports only Eclipse 4.4 and 4.5 (Luna and Mars, respectively). For information on downloading Scala as a plug-in for Eclipse, please refer to the following links: Getting Started and Download. The two links provide a step-by-step explanation of how to download Scala.

I have also begun to write some basic Scala programs (any similar Java programs, I attempted to translate into Scala). So far it is going OK, but certain declarations that were easy in Java, are different, and somewhat more complicated, in Scala.