But the following error is observed in the logs: Raw WARN [org.jboss.resource.adapter.jdbc.vendor.OracleValidConnectionChecker] (main) Unexpected error in pingDatabase java.lang.IllegalArgumentException: object
TheStringis the most widely used data structure. Caching theStringliterals and reusing them saves a lot of heap space because differentStringvariables refer to the same object in theStringpool.Stringintern pool serves exactly this purpose. Java String Pool isthe special memory region whereStringsare...
The most notable differences are that the class definition contains<T>, and the class fieldobjis no longer of typeObject, but rather, it is the generic typeT. The angle brackets in the class definition enclose the type parameter section, introducing the type parameter (or parameters) that wil...
since its introduction in java 8, the stream api has become a staple of java development. the basic operations like iterating, filtering, mapping sequences of elements are deceptively simple to use. but these can also be overused and fall into some common pitfalls. to get a better understandi...
It’s a rule set up by Java itself to prevent errors by disabling dynamic orders between the initialization of the class object and other assignments and operations. So when you need to perform a constructor chaining or call the superclass constructor, make sure that you do it on the first...
Also let us know what all information is required to attach in the support case to confirm this. We are experiencing a StackOverflowError during some kind of serialization the JBoss EAP is performing. The stacktrace is filled up with: Raw java.io.ObjectOutputStream.writeObject0(ObjectOutputStream...
The thing I'd definitely like using-wise, that VS definitely doesn't already do, is find potential "using"s that would provide an extension method that you are trying to use - the same way it provides potential "using"s that would match a class name if you type one in. This appl...
The biggest technical difference between MATLAB and Python is that in MATLAB, everything is treated as an array, while in Python everything is a more general object. For instance, in MATLAB, strings are arrays of characters or arrays of strings, while in Python, strings have their own type...
Everything looks pretty straightforward here. First we find a path for resources, and if it’s not null, we open a stream for it. In this case, the path is java.net.URL class, which has method openStream(). Ok, let’s check out the getResource() implementation: ...
other threads may first observe that the transfer pointer has been updated, but the object has not yet been copied. In order to ensure consistency, membar needs to be inserted between the copy and update of the object header, and the update of the object header in the JVM is unified and...