src/share/classes/java/util/function/DoubleBinaryOperator.java
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rev 6189 : 8004015: Add Extends and deaults for basic functional interface types
Summary: Adds the appropriate extends and default methods for core functional interfaces used by the JSR335 libraries.
Reviewed-by: duke
*** 25,40 ****
package java.util.function;
/**
* An operation on two {@code double} operands yielding a {@code double} result.
*
* @since 1.8
*/
! public interface DoubleBinaryOperator /* extends BinaryOperator<Double> */ {
! //
! // @Override
! // public default Double operate(Double left, Double right) { return operateAsDouble((double) left, (double) right); }
/**
* Returns the {@code double} result of the operation upon the
* {@code double} operands. The parameters are named {@code left} and
* {@code right} for operations where the order of parameters matters.
--- 25,55 ----
package java.util.function;
/**
* An operation on two {@code double} operands yielding a {@code double} result.
*
+ * <p/>This is the primitive type specialization of {@link BinaryOperator} for
+ * {@code double} and also may be used as a {@code BinaryOperator<Double>}. When
+ * used as a {@code BinaryOperator} the default {@code operate} implementation
+ * provided by this interface neither accepts null parameters nor does it return
+ * null results.
+ *
* @since 1.8
*/
! public interface DoubleBinaryOperator extends BinaryOperator<Double> {
!
! /**
! * {@inheritDoc}
! *
! * @param left {@inheritDoc}, must be non-null
! * @param right {@inheritDoc}, must be non-null
! * @return {@inheritDoc}, always non-null
! */
! @Override
! public default Double operate(Double left, Double right) {
! return operateAsDouble((double)left, (double)right);
! }
/**
* Returns the {@code double} result of the operation upon the
* {@code double} operands. The parameters are named {@code left} and
* {@code right} for operations where the order of parameters matters.