src/share/classes/java/util/function/LongUnaryOperator.java
Print this page
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
*** 25,37 ****
package java.util.function;
/**
* An operation on a single {@code long} operand yielding a {@code long} result.
*
* @since 1.8
*/
! public interface LongUnaryOperator {
/**
* Returns the {@code long} result of the operation upon the {@code long}
* operand.
*
--- 25,54 ----
package java.util.function;
/**
* An operation on a single {@code long} operand yielding a {@code long} result.
*
+ * <p>This is the primitive type specialization of {@link UnaryOperator} for
+ * {@code long} and also may be used as a {@code UnaryOperator<Long>}. When
+ * used as a {@code UnaryOperator} the default {@code operate} implementation
+ * provided by this interface neither accepts null parameters nor does it return
+ * null results.
+ *
* @since 1.8
*/
! public interface LongUnaryOperator extends UnaryOperator<Long> {
!
! /**
! * {@inheritDoc}
! *
! * @param operand {@inheritDoc}, must be non-null
! * @return {@inheritDoc}, always non-null
! */
! @Override
! public default Long operate(Long operand) {
! return operateAsLong((long)operand);
! }
/**
* Returns the {@code long} result of the operation upon the {@code long}
* operand.
*