Java Generics and Collections by Maurice Naftalin Maurice, Philip Wadler

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

Import java.util.Iterator; import java.util. You can use Generics like those shown in the following example. 0596527756 - Java Generics and Collections - This comprehensive guide shows you how to master the most important changes to Java since it was first released. The most popular usage of generics is undoubtedly the Java SE Collection utilities. And they are easy to understand – as long as no collections are involved. The common case for Java generics involves being able to write type-safe algorithms which can be applied to any appropriate data-type. One of those libraries is the commons collections library, of which I use the CollectionUtils class and ListUtils mostly. It builds ArrayDescriptor arrayDescriptor = new ArrayDescriptor("STRINGLIST",conn); // Translate the Java String{} to the Oracle SQL collection type. Perhaps everyone already knows about this, but I just found a very interesting feature of Java Generics - you can declare synthetic composite types using multiple bounds to allow you to treat two different classes that implement the same interfaces as if they had a common super Collection things = new ArrayList); // DOES NOT COMPILE this.add(new Foo()); this.add(new Bar()); doSomethingElse(things);. Wildcards have been introduced to Java some years ago (in JDK 1.5). The following program illustrated the differences between listing the contents of HashMap collection, with both Generics and without. 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. Ƚ自：http://www.diybl.com/course/3_program/java/javaxl/20071220/92737.html. Program Code: package com.java.simple.tutorial;. Head First Java 16 Data Structures: collections and generics Page 529 to 579.