Quick hints on getting JFLAP running on your PC...

• Make sure you have Java on your machine -- check for the directory C:\j2sdk1.4.2_04 or something similar.



• Download the JFLAP.jar file from this link



• Place the JFLAP.jar file where you'd like and then open a command-prompt window and cd to the directory where JFLAP.jar is located.



• Unpack the JFLAP.jar file with the command (your java path might be slightly different...)

           C:\YourDirectory>  C:\j2sdk1.4.2_04\bin\jar xfv JFLAP.jar
        

  The xfv argument tells the jar to extract from a file verbosely. You will see lots of files being extracted.
  
  Keep in mind that your java path might be slightly different. Also, under the Windows XP "System" control panel, in the "Advanced" tab, there is an "Environment Variables" button that will allow you to add C:\j2sdk1.4.2_04\bin to your path -- this isn't necessary, but it will allow you to run java, javac, and jar without prepending the path each time.



• From that same directory, run

           c:\YourDirectory>  C:\j2sdk1.4.2_04\bin\java -cp . JFLAP
        

  where the -cp . arguments tell java to look for the JFLAP.class file in the current directory (.). (cp stands for classpath.) JFLAP should start up, and you'll be on your way... .