21天自学JAVA

Sams Teach Yourself Java in 21 Days teaches you about the Java language and how to use it to create applications for any computing environment and Android apps that run on cell phones and other mobile devices. By the time you have finished the book, you’ll have well-rounded knowledge of Java and the Java class libraries. Using your new skills, you will be able to develop your own programs for tasks such as web services, database connectivity, XML processing, and mobile programming. You learn by doing in this book, creating several programs each day that demonstrate the topics being introduced. The source code for all these programs is available on the book’s official website at www.java21days.com, along with other supplemental material such as answers to reader questions. This book covers the Java language and its class libraries in 21 days, organized into three weeks. Each week covers a broad area of developing Java programs.