Question

I have a java file which uses jfreechart libraries, uses a text file from local drive and displays graph. Runs fine with eclipse. However, I want to run this from cmd prompt, other simple Java files are able to run successfully via cmd prmnt but not able to run this file.
PS: MyTool.java is able to compile without errors and class file is created, but not able to run.

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 1) This is how I am compiling it in cmd prompt: (gives 0 errors)

C:\Documents and Settings\hello.maga\workspace\MyTool\lib>javac -cp "gnujaxp.
jar;iText-2.1.5.jar;jcommon-1.0.16.jar;jfreechart-1.0.13.jar;jfreechart-1.0.13-e
xperimental.jar;jfreechart-1.0.13.jar;junit.jar;servlet.jar;swtgraphics2d.jar" MyTool.java

  2) This is how I am running it:


 C:\Documents and Settings\hello.maga\workspace\MyTool\lib>java -cp "gnujaxp.j
 ar;iText-2.1.5.jar;jcommon-1.0.16.jar;jfreechart-1.0.13.jar;jfreechart-1.0.13-ex
 perimental.jar;jfreechart-1.0.13.jar;junit.jar;servlet.jar;swtgraphics2d.jar" MyTool


    Error for second command: 

    Exception in thread "main" java.lang.NoClassDefFoundError: MyTool
    Caused by: java.lang.ClassNotFoundException: MyTool
    at java.net.URLClassLoader$1.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    Could not find the main class: MyTool.  Program will exit.

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What I don’t understand is, if there are any errors, then it should not compile in first place, can someone educate me. Thank you very much.

Answer 1

You need to include “.” in the classpath, like so:

java -cp ".;gnujaxp.jar;iText-2.1.5.jar;jcommon-1.0.16.jar;jfreechart-1.0.13.jar;jfreechart-1.0.13-experimental.jar;jfreechart-1.0.13.jar;junit.jar;servlet.jar;swtgraphics2d.jar"