javatpoint (1,182)


language agnostic - Pass by reference or pass by value?

language agnostic - Pass by reference or pass by value?

As it currently stands, this question is not a good fit for our Q&A format. We expect answers to be supported by facts, references, or expertise, but this question will likely solicit debate, argument…


Why doesn't Java autoboxing extend to method invocations of methods of the autoboxed types?

I want to convert a primitive to a string, and I tried: myInt.toString(); This fails with the error: int cannot be dereferenced Now, I get that primitives are not reference types(ie, not an Object) an…


Document or RPC based web services

My gut feel is that document based web services are preferred in practice-is this other peoples experience? Are they easier to support?(I noted that SharePoint uses Any for the "document type" in…


What's your “best practice” for the first Java EE Spring project?

I'm currently trying to get into the Java EE development with the Spring framework. As I'm new to Spring, it is hard to imaging how a good running project should start off. Do you have any best practi…



Java Annotations

What is the purpose of annotations in Java? I have this fuzzy idea of them as somewhere in between a comment and actual code. Do they affect the program at run time? What are their typical usages? Are…


java - When to choose checked and unchecked exceptions

In Java(or any other language with checked exceptions), when creating your own exception class, how do you decide whether it should be checked or unchecked? My instinct is to say that a checked except…


java - Why do you not explicitly call finalize() or start the garbage collector?

After reading this question, I was reminded of when I was taught Java and told never to call finalize() or run the garbage collector because "it's a big black box that you never need to worry about".…


java - JSF Lifecycle and Custom components

There are a couple of things that I am having a difficult time understanding with regards to developing custom components in JSF. For the purposes of these questions, you can assume that all of the…


java - Virtual functions in constructors, why do languages differ?

In C++ when a virtual function is called from within a constructor it doesn't behave like a virtual function. I think everyone who encountered for the first time was surprised but on second thought i…


Java: notify() vs. notifyAll() all over again

If one Googles for "difference between notify() and notifyAll()" then a lot of explanations will pop up(leaving apart the javadoc paragraphs). It all boils down to the number of waiting threads being…




java example and how tutorial pdf between with difference use