By Maydene Fisher
Up-to-date and improved to hide the total JDBC 3.0 API, together with the java.sql and the javax.sql programs, this 3rd variation of an instructional and reference includes step by step instructions, in-depth causes, and, for these new to Java know-how, an advent to the Java programming language and to SQL. the academic walks readers in the course of the production of a JDBC software, and complicated fabric covers outcome units, batch updates, and customized mapping. Fisher focuses on object-oriented languages.
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In other words, interfaces provide most of the advantages of multiple inheritance without its disadvantages. A package is a collection of related classes and interfaces. The following list, though not complete, gives examples of some Java packages and what they cover. lang— the basic classes. This package is so basic that it is automatically included in any Java program. It includes classes dealing with numerics, strings, objects, run time, security, and threads. swing— a set of graphical user interface (GUI) components that allow for portable graphical applications between Java enabled platforms.
As a result, code written in the Java programming language has done quite respectably in performance tests. Its performance numbers for interpreted bytecodes are usually more than adequate to run interactive graphical end-user applications. For situations that require unusually high performance, bytecodes can be translated on the fly, generating the final machine code for the particular CPU on which the application is running, at run time. High-level interpreted scripting languages generally offer great portability and fast prototyping but poor performance.
1. ODBC is not appropriate for direct use from the Java programming language because it uses a C interface. Calls from Java to native C code have a number of drawbacks in the security, implementation, robustness, and automatic portability of applications. 2. A literal translation of the ODBC C API into a Java API would not be desirable. For example, Java has no pointers (address variables), and ODBC makes copious use of them, including the notoriously error-prone generic pointervoid *. You can think of JDBC as ODBC translated into a high-level object-oriented interface that is natural for programmers using the Java programming language.