I have found these various “singleton” methods to be useful for passing a single value to an API that requires a collection of that value. Of course, this works best when the code processing the ...

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Have you ever wondered why the java.util.Collections class includes various “empty” class methods, which return immutable empty collections and immutable empty iterators? This post answers this ...

The Java Iterator is an all-purpose interface that simplifies looping through a collection of objects. Java's ListIterator provides all the functionality of the Iterator interface, with four ...