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You must declare the class the object will hold

Overview of Java

with a simple way to verify compliance with that standard, allows vendors to offer uniform support for Java across all platforms.



Portability—Java is portable across platforms. It is possible to write
platform-dependent code in Java, but it is also simple to write programs that move seamlessly across machines. Oracle server applications, which do not support graphical user interfaces directly on the platform that hosts them, also tend to avoid the few platform portability issues that Java has.

Automatic Storage Management—The Java virtual machine automatically performs all memory allocation and deallocation during program execution. Java programmers can neither allocate nor free memory explicitly. Instead, they depend on the JVM to perform these bookkeeping operations, allocating memory as they create new objects and deallocating memory when the objects are no longer referenced. The latter operation is known as garbage collection.

Introduction to Java in Oracle9i


Why Use Java in Oracle9i?

Standards for Connectivity to Relational Databases—JDBC and SQLJ enable Java code to access and manipulate data resident in relational databases. Oracle provides drivers that allow vendor-independent, portable Java code to access the relational database.

Why Use Java in Oracle9i?



As a database server, Oracle9i efficiently schedules work for thousands of users. The Oracle9i JVM uses the facilities of the RDBMS server to concurrently schedule Java execution for thousands of users. Although Oracle9i supports Java language


Java Developer’s Guide

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