need help -> new to ical4j; first tries

[GuKKDevel]

Discussed in #542

^{Originally posted by GuKKDevel January 12, 2022}
Hello,
I am trying to use ical4j in an Eclipse-IDE. So I downloaded from Sourceforge the latest version 3.0.0 of ical4j, added slf4j and slf4j-simple from the maven repository, same with commons-lang3 and commons-collections4 and cache-api-1.1.1 from the nexus. Included the jars into my classpath.

I coded your example

FileInputStream fin = new FileInputStream(inPfad + kalender[0] + ".ics");
CalendarBuilder builder = new CalendarBuilder();
Calendar calendar = builder.build(fin);`

Now I get

[main] INFO net.fortuna.ical4j.util.Configurator - ical4j.properties not found.
Exception in thread "main" javax.cache.CacheException: No CachingProviders have been configured
at javax.cache.Caching$CachingProviderRegistry.getCachingProvider(Caching.java:391)
at javax.cache.Caching$CachingProviderRegistry.getCachingProvider(Caching.java:361)
at javax.cache.Caching.getCachingProvider(Caching.java:151)
at net.fortuna.ical4j.util.JCacheTimeZoneCache.(JCacheTimeZoneCache.java:15)
at java.base/java.util.Optional.orElseGet(Optional.java:369)
at net.fortuna.ical4j.model.TimeZoneLoader.cacheInit(TimeZoneLoader.java:275)
at net.fortuna.ical4j.model.TimeZoneLoader.(TimeZoneLoader.java:81)
at net.fortuna.ical4j.model.TimeZoneRegistryImpl.(TimeZoneRegistryImpl.java:125)
at net.fortuna.ical4j.model.TimeZoneRegistryImpl.(TimeZoneRegistryImpl.java:116)
at net.fortuna.ical4j.model.DefaultTimeZoneRegistryFactory.createRegistry(DefaultTimeZoneRegistryFactory.java:48)
at net.fortuna.ical4j.data.CalendarBuilder.(CalendarBuilder.java:105)
at Ausprobieren.(Ausprobieren.java:41)
at Ausprobieren.main(Ausprobieren.java:66)

Don't know where the mistake is. can you help me?

Kind Regards
GuKKDevel (Karl-Heinz)

[benfortuna]

As a workaround, try creating an empty file called "ical4j.properties" in your root source directory. We'll try to improve the experience in future.

[GuKKDevel]

As suggested, created the file but still get

Wed Jan 19 11:27:56 CET 2022
Exception in thread "main" javax.cache.CacheException: No CachingProviders have been configured
at javax.cache.Caching$CachingProviderRegistry.getCachingProvider(Caching.java:391)
at javax.cache.Caching$CachingProviderRegistry.getCachingProvider(Caching.java:361)
at javax.cache.Caching.getCachingProvider(Caching.java:151)
at net.fortuna.ical4j.util.JCacheTimeZoneCache.(JCacheTimeZoneCache.java:15)
at java.base/java.util.Optional.orElseGet(Optional.java:369)
at net.fortuna.ical4j.model.TimeZoneLoader.cacheInit(TimeZoneLoader.java:275)
at net.fortuna.ical4j.model.TimeZoneLoader.(TimeZoneLoader.java:81)
at net.fortuna.ical4j.model.TimeZoneRegistryImpl.(TimeZoneRegistryImpl.java:125)
at net.fortuna.ical4j.model.TimeZoneRegistryImpl.(TimeZoneRegistryImpl.java:116)
at net.fortuna.ical4j.model.DefaultTimeZoneRegistryFactory.createRegistry(DefaultTimeZoneRegistryFactory.java:48)
at net.fortuna.ical4j.data.CalendarBuilder.(CalendarBuilder.java:105)
at Ausprobieren.(Ausprobieren.java:41)
at Ausprobieren.main(Ausprobieren.java:66)

[benfortuna]

Yup, so add this line in ical4j.properties:

net.fortuna.ical4j.timezone.cache.impl=net.fortuna.ical4j.util.MapTimeZoneCache