java.lang.ClassCastException: java.util.HashSet

Searched on Google with the first line of a JAVA stack trace?

We can recommend more relevant solutions and speed up debugging when you paste your entire stack trace with the exception message. Try a sample exception.

Recommended solutions based on your search

Solutions on the web

via Coderanch by Scott Selikoff, 1 year ago
java.util.HashSet
java.lang.ClassCastException: java.util.HashSet
at java.util.TreeMap.compare(Unknown Source)
at java.util.TreeMap.getEntry(Unknown Source)
at java.util.TreeMap.containsKey(Unknown Source)
at undefined.TestMe.main(TestMe.java:21)

Users with the same issue

4 times, 3 months ago
Once, 7 months ago
4 times, 9 months ago
Once, 1 year ago
2 times, 1 year ago

Write tip

Know the solutions? Share your knowledge to help other developers to debug faster.