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What causes and what are the differences between NoClassDefFoundError and ClassNotFoundException?
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From http://www.javaroots.com/2013/02/classnotfoundexception-vs.html:
ClassNotFoundException : occurs when class loader could not find the required class in class path. So, basically you should check your class path and add the class in the classpath.
NoClassDefFoundError : this is m...
Which is more efficient, a for-each loop, or an iterator?
... more power over explicitly using a type of iterator (e.g. List.iterator() vs. List.listIterator(), although in most cases they return the same implementation). You also have the ability to reference the Iterator in your loop. This allows you to do things like remove items from your collection wit...
Possible heap pollution via varargs parameter
...ntains references whose types are not what we might expect? (List<A> vs List<B> in your example)
– hertzsprung
Sep 17 '12 at 16:03
37
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Use 'import module' or 'from module import'?
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Even though many people already explained about import vs import from, I want to try to explain a bit more about what happens under the hood, and where all the places it changes are.
import foo:
Imports foo, and creates a reference to that module in the current namespace. The...
How to use a WSDL
...re is no URL where WSDL can be accessed and then adding a Web reference in VS won't work. However, the provider does want YOU (I mean OP) to know all you need to know about the service contract, that's why they sent the WSDL file. Now the OP needs to generate the proxy code from it, the question i...
What does it mean to “program to an interface”?
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totally agree i.e. the independence between what is done vs. how it is done. By partitioning a system along independent components, you end up with a system that it is simple and reusable (see Simple Made Easy by the guy who created Clojure)
– beluchin
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What's the difference between streams and datagrams in network programming?
What's the difference between sockets (stream) vs sockets (datagrams)? Why use one over the other?
3 Answers
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What exactly is Type Coercion in Javascript?
...number, string, boolean, null, undefined + Symbol (added in ES6).
Implicit vs. explicit coercion
Type coercion can be explicit and implicit.
When a developer expresses the intention to convert between types by writing the appropriate code, like Number(value), it’s called explicit type coercion (or...
How Do I 'git fetch' and 'git merge' from a Remote Tracking Branch (like 'git pull')
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Selecting just one branch: fetch/merge vs. pull
People often advise you to separate "fetching" from "merging". They say instead of this:
git pull remoteR branchB
do this:
git fetch remoteR
git merge remoteR branchB
What they don't mention is tha...
Resolving LNK4098: defaultlib 'MSVCRT' conflicts with
...e verbose output until I found msdn.microsoft.com/en-us/library/aa267384(v=vs.60).aspx which says the verbose output will only tell you all the runtime libraries involved in the link problem. You still have to then figure out which link input has been compiled with the conflicting Runtime Library.
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