Java 8 features - class 21- UnaryOperator interface and BinaryOperator interface in detail
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UnaryOperators and BinaryOperators:-
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Please be informed that the UnaryOperator T interface is a part of the java.util.function package. It is a functional interface that represents an operation on a single operand that produces a result of the same type. Essentially, it is a specialized version of the Function T, R interface where the input and output types are the same.
Key Points:-
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Functional Interface: UnaryOperator can be used as the assignment target for a lambda expression or method reference.
Primitive versions of UnaryOperator:-
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The primitive versions of this interface to improve performance by avoiding the overhead of boxing and unboxing. These primitive versions are:
IntUnaryOperator: For int values.
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@FunctionalInterface
public interface IntUnaryOperator {
int applyAsInt(int operand);
}
LongUnaryOperator: For long values.
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@FunctionalInterface
public interface LongUnaryOperator {
long applyAsLong(long operand);
}
DoubleUnaryOperator: For double values.
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@FunctionalInterface
public interface DoubleUnaryOperator {
double applyAsDouble(double operand);
}
BinaryOperator:-
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Please be informed that the BinaryOperator T interface is part of the java.util.function package. It represents an operation on two operands of the same type that produces a result of the same type. Essentially, it's a specialized version of the BiFunction T, U, R interface where the input types are the same.
Key Points:
=========
Functional Interface: BinaryOperator can be used as the assignment target for a lambda expression or method reference.
Primitive Versions of BinaryOperators:-
================================
There are primitive versions of the BinaryOperator interface designed to improve performance by avoiding the overhead of boxing and unboxing for primitive types. The primitive versions of BinaryOperator are:
IntBinaryOperator: For int values.
===========================
@FunctionalInterface
public interface IntBinaryOperator {
int applyAsInt(int left, int right);
}
LongBinaryOperator: For long values.
===============================
@FunctionalInterface
public interface LongBinaryOperator {
long applyAsLong(long left, long right);
}
DoubleBinaryOperator: For double values.
==================================
@FunctionalInterface
public interface DoubleBinaryOperator {
double applyAsDouble(double left, double right);
}