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231

Cannot sort descending, when ordering by caluculated float in a method

. public class InvoiceItem{     private float price;     private float amount;     .. } public class Invoice{     private List<InvoiceItem> invoiceItemList;     ..     public Float getPrice(){         Float price = 0f;         if (invoiceItemList!=null) {             for(InvoiceItem ii
37

ObjectDB Object Database Features

(for persistent fields) Primitive types (boolean, byte, short, char, int, long, float, double). Wrapper types (Boolean, Byte, Short, Character, Integer, Long, Float, Double). java.lang.String Date types: java ... , char, int, long, float and double). Wrappers (Boolean, Byte, Short, Character, Integer, Long
26

JPA Persistable Types

: boolean, byte, short, char, int, long, float and double. Equivalent wrapper classes from package java.lang: Boolean, Byte, Short, Character, Integer, Long, Float and Double. java.math.BigInteger
26

Index Definition

, long, float, double. Equivalent wrapper classes from package java.lang: Byte, Short, Character, Integer, Long, Float, Double. java.math.BigInteger, java.math.BigDecimal. java.lang.String. java.util.Date
26

Database Schema Evolution

to any numeric type. In this context numeric types are: byte, short, char, int, long, float, double, Byte, Short, Character, Integer, Long, Float, Double, BigInteger, BigDecimal and enum values
26

Comparison in JPQL and Criteria API

, char, int, long, float, double), wrapper types (Byte, Short, Character, Integer, Long, Float
26

JPA Primary Key

: boolean, byte, short, char, int, long, float, double. Equivalent wrapper classes from package java.lang: Byte, Short, Character, Integer, Long, Float, Double. java.math.BigInteger, java.math.BigDecimal
4

[ODB1] Chapter 7 - JDOQL Queries

, 0xFFFF, 07777, ... long 2003L, -127L, 0L, 0xFFFFL, 07777L, ... float 3.14F, 0f, 1e2f, -2.f, 5.04e+17f ... (Byte, Short, Character, Integer, Long, Float, Double), as well as BigInteger and BigDecimal can participate in comparisons as if they were primitive numeric types (byte, short, char, int, long, float
3

[ODB1] Chapter 3 - Persistent Classes

are also persistent types: All the primitive types - boolean, byte, short, char, int, long, float and double. Selected classes in package java.lang: Boolean, Byte, Short, Character, Integer, Long, Float, Double, Number ... (for example from int to float and from float to int) the old value is converted automatically to the new
2

[ODB1] Chapter 4 - JDO Metadata

, short, char, int, long, float or double) embedded wrapper (Boolean, Byte, Short, Character, Integer, Long, Float or Double) embedded java.lang.String embedded java.util.Date external (non embedded

Getting Started

ObjectDB is very easy to use. Follow the Getting Started Tutorial and the Quick Tour manual chapter and in minutes you may be able to write and run first Java programs against ObjectDB.

Prior knowledge or experience in database programming (SQL, JDBC, ORM, JPA, etc.) is not required, but some background in using the Java language is essential.

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