java.lang.NoClassDefFoundError

[xtremebass]

Hi Bytes,

i run the sample java code(BarChartDemo.java)which is producing the Bar charts as output if no error in the program, but i got run time error like this,

java.lang.NoClassDefFoundError: BarChartDemo (wrong name: org/jfree/chart/demo/BarChartDemo)
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknow n Source)
at sun.plugin2.applet.Applet2ClassLoader.findClass(Un known Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.plugin2.applet.Plugin2ClassLoader.loadCode(Unk nown Source)
at sun.plugin2.applet.Plugin2Manager.createApplet(Unk nown Source)
at sun.plugin2.applet.Plugin2Manager$AppletExecutionR unnable.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Exception: java.lang.NoClassDefFoundError: BarChartDemo (wrong name: org/jfree/chart/demo/BarChartDemo)

Please suggest me something about this problem.

[r035198x]

In what package is that class(what package declaration does it have?). It's package must also match the folder structure in which you have put it.

[JosAH]

@xtremebass
Carefully check the name of your class and the name of the file in which it is stored. Also check if the path to that file matches the package structure.

The error message says it all: the name of the class and the file don't match; the classloader did find something but the names don't match.

kind regards,

Jos

[devgupta01]

if you cange the file name as class name then it will run..

[pjerald]

check the CLASSPATH variable. you can find it easily by ,


use this for windows -
echo %CLASSPATH%
use this for linux -
echo $CLASSPATH