Thread: [Jython-dev] Embedding Python in Java application

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<html><div style='background-color:'><DIV>From</DIV>
<DIV>Venkat</DIV>
<DIV>&nbsp;</DIV>
<DIV>Hi,</DIV>
<DIV>&nbsp;</DIV>
<DIV>I use Windows 2000 and I program in Java.</DIV>
<DIV>&nbsp;</DIV>
<DIV>I have installed Jython-2.1a3.&nbsp; I can invoke Jython from command line</DIV>
<DIV>by typign "Jython" and it runs well.&nbsp; I want to embed it in a Java</DIV>
<DIV>application.</DIV>
<DIV>&nbsp;</DIV>
<DIV>I tried running SimpleEmbedded.java, but I get error messages.</DIV>
<DIV>I have specified below the classpath and path set by me.&nbsp; I have</DIV>
<DIV>also attached the errors produced.</DIV>
<DIV>&nbsp;</DIV>
<DIV>__________________________________________________</DIV>
<DIV>ClassPath:<BR>.;.;C:\PROGRA~1\JMF21~1.1\lib\sound.jar;<BR>C:\PROGRA~1\JMF21~1.1\lib\jmf.jar;%systemroot%\java\classes;<BR>C:\jython-2.1a3;</DIV>
<DIV><BR>Path:<BR>%SYSTEMROOT%\SYSTEM32;%SYSTEMROOT%;<BR>%SYSTEMROOT%\SYSTEM32\WBEM;<BR>C:\JDK1.3.1\BIN;C:\PYTHON21;C:\JYTHON-2.1a3;<BR>C:\PROGRAM FILES\BORLAND\CBUILDER3\BIN</DIV>
<DIV>Error message</DIV>
<DIV><BR>Exception in thread "main" java.lang.NullPointerException<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; at org.python.core.PyJavaClass.lookup(PyJavaClass.java:43)<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; at org.python.core.PyObject.&lt;init&gt;(PyObject.java:46)<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; at org.python.core.PySingleton.&lt;init&gt;(PySingleton.java:8)<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; at org.python.core.PyNone.&lt;init&gt;(PyNone.java:10)<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; at org.python.core.PySystemState.initStaticFields(PySystemState.java:391<BR>)<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; at org.python.core.PySystemState.initialize(PySystemState.java:370)<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; at org.python.core.PySystemState.initialize(PySystemState.java:344)<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; at org.python.core.PySystemState.initialize(PySystemState.java:337)<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; at org.python.util.PythonInterpreter.&lt;init&gt;(PythonInterpreter.java:63)<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; at org.python.util.PythonInterpreter.&lt;init&gt;(PythonInterpreter.java:47)<BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; at SimpleEmbedded.main(SimpleEmbedded.java:8)<BR>_______________________________________________</DIV>
<DIV>&nbsp;</DIV>
<DIV>Can you let me what I am doing wrong ?</DIV>
<DIV>Thanking you</DIV>
<DIV>Venkat</DIV>
<DIV>21 Aug 2001</DIV></div><br clear=all><hr>Get your FREE download of MSN Explorer at <a href='http://go.msn.com/bql/hmtag_itl_EN.asp'>http://explorer.msn.com</a><br></html>

Thread: [Jython-dev] Embedding Python in Java application

jython-dev