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closeJava Programming with Oracle SQLJ
  Copyright
  Table of Contents
 openPreface
 open1. Introduction
 open2. Relational Databases, SQL, and PL/SQL
 open3. Fundamental SQLJ Programming
 open4. Database Objects
 open5. Collections
 open6. Deploying SQLJ in the JServer
 open7. Large Objects
 open8. Contexts and Multithreading
 open9. Advanced Transaction Control
 open10. Performance Tuning
 open11. Combining JDBC, SQLJ, and Dynamic SQL
 closeA. Java and Oracle Type Mappings
   A.1 JDBC 1.x Type Mappings
   A.2 Additional JDBC 2.0 Type Mappings
  A.3 Java Wrapper Class Mappings
   A.4 SQLJ Stream Class Mappings
   A.5 Oracle Extension Class Mappings
 openB. Oracle Java Utilities Reference
 openC. SQLJ in Applets, Servlets, and JavaServer Pages
  Colophon
  Index

Database > Java Programming with Oracle SQLJ > A. Java and Oracle Type Mappings > A.3 Java Wrapper Class Mappings

< BACKCONTINUE >

A.3 Java Wrapper Class Mappings

Java wrapper classes allow you to store database NULL values, whereas the Java primitive types (such as int and float) do not. The Java wrapper classes are useful when you are retrieving a database column value that may be NULL. Table A-3 lists the mappings between the Java wrapper classes and the compatible Oracle types.

Table A-3. Java wrapper class mappings

Java type

Oracle type

java.lang.Boolean

NUMBER

java.lang.Byte

NUMBER

java.lang.Short

NUMBER

java.lang.Integer

NUMBER

java.lang.Long

NUMBER

java.lang.Float

NUMBER

java.lang.Double

NUMBER

< BACKCONTINUE >

Index terms contained in this section

boolean datatype
      Boolean class
Byte class
datatypes
     Java and Oracle type mappings
            Java wrapper classes
double datatype
      Double class
float datatype (Java)
      Float class
Integer class
java.lang.Boolean wrapper class
java.lang.Byte wrapper class
java.lang.Double wrapper class
java.lang.Float wrapper class
java.lang.Integer wrapper class
java.lang.Long wrapper class
java.lang.Short wrapper class
Long class
short datatype
      Short class



Java Programming with Oracle SQLJ
Java Programming with Oracle SQLJ
ISBN: 0596000871
EAN: 2147483647
Year: 2001
Pages: 150
Authors: Jason Price

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