It came to our attention that the Java application blocker is prompting that self-assigned or untrusted applications have been blocked due to security settings. Due to this issue, some of the ...

java.lang.NullPointerException: Attempt to invoke virtual method 'int java.lang.Object.hashCode ()' on a null object reference at j$.util.concurrent.ConcurrentHashMap.get (ConcurrentHashMap.java:0) ...

Fatal error: java.lang.NullPointerException at java.base/java.util.concurrent.ConcurrentHashMap.putVal(ConcurrentHashMap.java:1011) at java.base/java.util.concurrent ...

Iterators in Java typically expect exclusive access to the data structure they loop through. If another thread tries to modify a collection of objects while an ...

A colleague of mine recently ran into an issue that I have not run into myself, but found to be interesting and, in my opinion, worth blogging about here. During some distributed Java development, my ...