Download Oracle9i Java Developers Guide by Maring S. PDF

By Maring S.

This e-book lias been written for the next audiences:■ Management-You can have bought Oracle9i for purposes except Java improvement in the database. notwithstanding, which will comprehend extra approximately Oracle9i Java positive aspects, see "Overview of Oracle9i Java Documentation" on web page 1-23 for a administration perspective.■ Non-Java Developers-Oracle database programming contains PL/SQL and different non-Java programming. for knowledgeable PL/SQL builders who're now not accustomed to Java, a quick review of Java and object-oriented strategies is mentioned within the first a part of bankruptcy 1, "Introduction to Java in Oracle9i". For extra exact details on Java, see "Java info assets" on the finish of this Preface.■ Java Developers-Pure Java builders are used to a Java atmosphere that follows the solar Microsvstems specification. although, while Java is mixed within the database, either Java and database strategies merge. therefore, the Java surroundings inside Oracle9; is elevated to incorporate database issues. the majority of this booklet discusses the right way to execute Java within the database. the next outlines the 2 viewpoints that come up from this merge:"

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Oracle9i Java Developers Guide

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Consider the following cases: public class { B b; public } public class { C c; public } public class { A a; public } A void assignB () {b = new B()} B void assignC () {c = new C()} C void assignA () {a = new A()} The system tracks dependencies at a class level of granularity. In the preceding example, you can see that classes A, B, and C depend on one another, because A holds an instance of B, B holds an instance of C, and C holds an instance of A. If you change the definition of class A by adding a new field to it, the dependency Writing Java Applications on Oracle9i 2-19 Preparing Java Class Methods for Execution mechanism in Oracle9i flags classes B and C as invalid.

The compiled code is stored in the class schema objects. Oracle9i logs all compilation errors both to loadjava’s logfile and the USER_ ERRORS view. For more information on the USER_ERRORS view, see the Oracle9i Reference for a description of this table. Compiling Source at Runtime When you load the Java source into the database without the -resolve option, Oracle9i compiles the source automatically when the class is needed during runtime. The source file is loaded into a source schema object. Oracle9i logs all compilation errors both to loadjava’s logfile and the USER_ ERRORS view.

Oracle’s Java Application Strategy One appeal of Java is its ubiquity and the growing number of programmers capable of developing applications using it. Oracle furnishes enterprise application developers with an end-to-end Java solution for creating, deploying, and managing Java applications. The total solution consists of client-side and server-side programmatic interfaces, tools to support Java development, and a Java virtual machine integrated with the Oracle9i database server. All these products are 100 percent compatible with Java standards.

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