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	Java Programming with Oracle SQLJ
		Copyright
		Table of Contents
		Preface
		1. Introduction
		2. Relational Databases, SQL, and PL/SQL
		3. Fundamental SQLJ Programming
		4. Database Objects
		5. Collections
		6. Deploying SQLJ in the JServer
		7. Large Objects
		8. Contexts and Multithreading
		9. Advanced Transaction Control
		10. Performance Tuning
		11. Combining JDBC, SQLJ, and Dynamic SQL
		A. Java and Oracle Type Mappings
		B. Oracle Java Utilities Reference
		C. SQLJ in Applets, Servlets, and JavaServer Pages
		Colophon
		Index

Database > Java Programming with Oracle SQLJ > A. Java and Oracle Type Mappings

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Appendix A. Java and Oracle Type Mappings

This appendix documents the mappings between Java types used to create host variables and objects later used in SQLJ host expressions, and their compatible Oracle database types. When a column is retrieved from the database into a compatible Java host variable or object, the Oracle database type is converted to the corresponding Java type. For example, using the mappings defined in Table A-1, you can see that a host variable defined using a Java short, int, or long type may be used to store a value retrieved from a database NUMBER column. The reverse happens when you use a Java host variable or object to supply a value to a database column via a host expression; for example, you can use a Java short, int, or long host variable to supply a value to a database NUMBER column.

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