45 | Performance in large transactions static List<Float> createFloatArray(float value) { int values = 1; List<Float> floats = new ArrayList<Float>(values); for (float i = 0; i < values; i++) { floats.add(value + (i / values)); } return floats; } @Entity public static class MyEntity { @OneToMany(cascade |
18 | Numbers in JPQL and Criteria Queries, but all the numeric types (byte, short, int, long, float, double, BigInteger, BigDecimal) are supported. Unary |
18 | Literals in JPQL and Criteria Queries, 07777L float: 3.14F, 0f, 1e2f, -2.f, 5.04e+17f double: 3.14, 0d, 1e2D, -2., 5.04e+17 ObjectDB |
12 | javax.persistence.criteria.CriteriaBuilder<Float> x) Create an aggregate expression applying the sum operation to a Float-valued expression, returning a Double result. Create an aggregate expression applying the sum operation to a Float-valued ... <Double> Since: JPA 2.0 Expression<Float> toFloat( Expression<?> number) Typecast. Typecast. Returns same |
9 | javax.persistence.MappedSuperclass") protected Float hourlyWage; public PartTimeEmployee() {} public Float getHourlyWage() { ... } public void setHourlyWage(Float wage) { ... } } Since: JPA 1.0 |
9 | javax.persistence.AttributeOverride { // address field mapping overridden to ADDR protected Float wage(); public Float getHourlyWage() { ... } public void setHourlyWage(Float wage) { ... } } Example 2 |
7 | sumAsDouble(x)Method javax.persistence.criteria.CriteriaBuilder Expression<Double> sumAsDouble( Expression<Float> x ) Create an aggregate expression applying the sum operation to a Float-valued expression, returning a Double result. Parameters: x - expression representing input value to sum operation Returns: sum expression Since: JPA 2.0 |
1 | javax.jdo.spi.StateManager value of the field Returns: the new value for the field Since: JDO 1.0 float getFloatField( PersistenceCapable pc, int field, float currentValue) Return the value for the field. Return the value ... of the field Since: JDO 1.0 void providedFloatField( PersistenceCapable pc, int field, float currentValue |
0 | javax.jdo.annotations.Column when handling floating point values. Scale for the column when handling floating point values. Returns: the scale for the column when handling floating point values Default value: -1 Since: JDO 2.1 |
0 | setFloatField(pc, field, currentValue, newValue)Method javax.jdo.spi.StateManager void setFloatField( PersistenceCapable pc, int field, float currentValue, float newValue ) Mark the field as modified by the user. Parameters: pc - the calling PersistenceCapable instance field - the field number currentValue - the current value of the field |
