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Java Generics and Collections by Maurice Naftalin Maurice, Philip Wadler

Java Generics and Collections Maurice Naftalin Maurice, Philip Wadler ebook
Publisher: O'Reilly Media
ISBN: 0596527756, 9780596527754
Page: 288
Format: chm

Specifically, please show examples of undesired consequences if the compiler allowed each of these to compile. Head First Java 16 Data Structures: collections and generics Page 529 to 579. Collections and Substitution rules. Generics in Java is one of those features where almost everyone uses but very people, including myself, really understand. That was the approach used by C# when generics were introduced, but Java did not take this approach because of the huge amount of pre-existing Java code using collections. Collections deal with objects which are java.lang.Object type. Some time ago I passed SCJP before this exam I thought that I know Generics but I didn't. One of those libraries is the commons collections library, of which I use the CollectionUtils class and ListUtils mostly. I read this book twice, and I suggest every java developer two read it twice or more. Let us get into more practical matters. Please help me understand why add1() and add4() report errors and why add2() and add3() don't. When we save any object to Collections it saves as java.lang.Object type and it returns as such. The following are some legal assignments:. Generics are mostly used with Collections. Collections are the primary motivation for Generics in Java. Let us take a look at some substitution rules.