FAQ
1. I'm confused! What is Java?
2. Do I need to install Java before I can use JLink?
3. How do I check whether Java is installed?
4. Help! Java 6 is not installed on my computer.
5. How do I install JLink?
6. How do I create a flow chart in JLink?
7. Can I print my flow chart?
8. Can I export a flow chart to PDF or another format?
1. I'm confused! What is Java?
Java is [1] the name of a programming language (the Java language), [2] a compiler (the Java compiler) and [3] a virtual machine (the "Java Virtual Machine" or JVM) that runs compiled Java programs on your computer. Java is not dependent on any particular operating system (e.g. Windows or Mac), which means you can run Java software on any computer with a JVM! Check out the Wikipedia article about Java if you'd like to learn more.
2. Do I need to install Java before I can use JLink?
Yes, unless it's already installed on your system. The "Java Virtual Machine" (JVM) version 6 is required for JLink to run. Luckily there are JVMs for most operating systems (Windows, Macintosh, Linux and Unix). The newer versions of Mac (OSX), Windows and Linux are often shipped with Java pre-installed.
3. How do I check whether Java is installed?
Macintosh users
Open the terminal program and type at the prompt:
java -version
You should get something along the lines of:
java version "1.6.0_03"
Java(TM) SE Runtime Environment
Don't worry if you don't have exactly these numbers. java 6, 1.6, 1.6.0 etc are all the same type of Java. The naming of Java versions can be confusing but as long as there's a 6 in it somewhere you will be okay.
Windows users
Open the Start menu. Click on "Run" and type into the Run text box:
cmd
A black DOS prompt window should appear. At the prompt type:java -version
If you see a 6 in the version number, you're in business!
Linux users
Open bash and type:
java -version
You should get something like:
java version "1.6.0_03"
Java(TM) SE Runtime Environment
If the numbering is not exact but there's a 6 in the version number, you should be okay.
4. Help! Java 6 is not installed on my computer.
Macintosh and Windows users
Visit the Java website. Click "free Java download". Windows installers have the file extension .exe. Download and install the Java software.
Linux users
If you don't have the right version, or your attempt to check Java returned the following:
java: command not found
... you'll have to install Java yourself.
Linux distributions with a package management system
These include Fedora, SuSE, Mandriva and Ubuntu. Search in your respective distro for
sun-java6-jre
sun-java6-plugin
These packages will install the JVM and the Firefox plugin for viewing Java applets.
Linux distributions without a package management system
Visit the Java website. Click "free Java download".
Download the RPM file or self-extracting package and use
these detailed instructions
(written for Linux beginners) to install Java on your system.
5. How do I install JLink?
When JLink is ready for end users, it will not need installing (hooray). With Java installed, you will simply run an exe file (Windows, JLink_Authoring_Tool.exe), double click a jar file (Macintosh, JLink_Authoring_Tool.jar), or run the program from bash in linux (by typing "java -jar JLink_Authoring_Tool.jar").
6. How do I create a flow chart in JLink?
At the present time, JLink is not ready for creating flow charts. The final software will allow users to create flow charts with several methods:
- Use the graphical authoring tool (easy).
- Hook directly into the library of JLink itself and write a Java application that makes flowcharts (harder, requires knowledge of Java language).
- Script the library to make them for you with one of Javascript, Python, Ruby, Groovy, Perl, LOLCODE or the (to be constructed) JLink system language (harder, requires knowledge of a programming language).
7. Can I print my flow chart?
Printing is not possible at the present time (the software is still being developed), but it will be implemented eventually. Our initial goal is to enable PDF and PNG export of flow charts. The PDF and PNG files could easily be printed with other software. Printing will (further down the track) become an option from within the authoring tool.
8. Can I export a flow chart to PDF or another format?
That feature is not implemented yet. When it is, you will be able to export a flow chart from within the authoring tool. Those who are more programming savvy may export a chart with Java or a scripting language, using JLink libraries.
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