Javax.help.HelpSetException: Could not parse

Question

Hi,
I am working on JavaHelp2.0. I want to run my JavaHelp Application using the IntelliJ Idea. I created the sample files for the Application and included the javaHelp jars into the classpath. I am not getting any kind of compile time errors.
But, when I was trying to run my javaHelp application, i am getting the following error log:
javax.help.HelpSetException: Could not parse
Got an IOException (null)
Parsing failed for null
     at javax.help.HelpSet.<init>(HelpSet.java:146)
     at com.tradecapture.experiments.javahelp.FTPApp.createHelp(FTPApp.java:53)
     at com.tradecapture.experiments.javahelp.FTPApp.<init>(FTPApp.java:24)
     at com.tradecapture.experiments.javahelp.FTPApp.main(FTPApp.java:60)
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
     at java.lang.reflect.Method.invoke(Method.java:324)
     at com.intellij.rt.execution.application.AppMain.main(AppMain.java:78)
java.lang.NullPointerException
     at com.tradecapture.experiments.javahelp.FTPApp.<init>(FTPApp.java:40)
     at com.tradecapture.experiments.javahelp.FTPApp.main(FTPApp.java:60)
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
     at java.lang.reflect.Method.invoke(Method.java:324)
     at com.intellij.rt.execution.application.AppMain.main(AppMain.java:78)
Exception in thread "main"
Process finished with exit code 1
I appreciate, if anyone could provide me comments on how to overcome this kind of runtime error.
Thanks & Regards,
Sunil.

Answer 1

Hello,
I understood the problem. The problem is bcoz the findHelpSet() method is returning a null value. This is bcoz it is not able to find the
HelpSet file.
Now, i would like to reframe my problem.
Why is the findHelpSet() method returning null value even when the
directory which contains the file has been added to the CLASSPATH?
Here is my code to invoke the JavaHelp from the application:
ClassLoader cl = MDIApplication.class.getClassLoader();
javax.help.HelpSet hs;
javax.help.HelpBroker hb;
javax.help.CSH csh;
try{
System.out.println("Helpset name : " + javax.help.HelpSet.findHelpSet(cl,helpHS));
java.net.URL hsURL = javax.help.HelpSet.findHelpSet(cl,helpHS);
hs = new javax.help.HelpSet(null, hsURL);
catch(Exception ee)
System.out.println("Helpset " + ee.getMessage());
System.out.println("Helpset " + helpHS + " not found. ");
return;
hb = hs.createHelpBroker();
new javax.help.CSH.DisplayHelpFromSource(hb);