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Java Generics and Collections Maurice Naftalin Maurice, Philip Wadler
Publisher: O'Reilly Media

Yes, I know, it doesn't get any more boring. The generic helps to avoid unnecessary casting when dealing with objects in a collection. Importance of Generics and Java 5 features like Enum, Autoboxing, varargs and Collection utilities like CountDownLatch, CyclicBarrier and BlockingQueue are getting more and more popular on Java interviews. The common case for Java generics involves being able to write type-safe algorithms which can be applied to any appropriate data-type. Let's take a look at a piece of code that uses a Collection to store some Strings. Generics are an oddly-named thing in Java that associate objects stored in a Collection with a particular type. I have a method: public List sortStuff(List toSort) { java.util.Collections.sort(toSort); return toSort; } This produces a. This second program on stack creates generics stacks storing all ints, doubles, chars and strings. The java generic program feature is unfamiliar to most of the programmers. This one is basically a write-up of a collection of links about Java generics. The most popular usage of generics is undoubtedly the Java SE Collection utilities. Java 5 enhanced for loop is used to print the elements. I recently wrote a blog entry about reluctantly accepting Java Generics.