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Java for Programmers

New Features in Java 8

## `BinaryOperator<T>`
`BinaryOperator<T>` is a functional interface that inherits from `BiFunction<T, T, T>` interface. The `BinaryOperator<T>` interface takes only one parameter as compared to `BiFunction<T, T, T>`, which takes three parameters(two operands type and one result type).

Both the input objects and the result are of the same type in `BinaryOperator<T>`.

Below are the few interfaces that come under the `BinaryOperator<T>` category.
|     |     |    |
| --- | --- | --- |
|`BinaryOperator<T>`     |Represents an operation upon two operands of the same type, producing a result of the same type as the operands  (reference type)     |  	`T apply(T t, T u)`
|`DoubleBinaryOperator`     |Accepts two double-value operands and produces a double-value result     |  `double applyAsDouble(double left, double right)`
|`IntBinaryOperator`     |Accepts two int-value operands and produces an int-value result     |  `int applyAsInt(int left, int right)`
|`LongBinaryOperator`     |Accepts two long-value operands and produces a long-value result.     |  `applyAsLong(long left, long right)`  

# `BinaryOperator<T>`
`BinaryOperator<T>` is a functional interface that inherits from `BiFunction<T, T, T>` interface. The `BinaryOperator<T>` interface takes only one parameter as compared to `BiFunction<T, T, T>`, which takes three parameters(two operands type and one result type).

Both the input objects and the result are of the same type in `BinaryOperator<T>`.

Below are the few interfaces that come under the `BinaryOperator<T>` category.
|     |     |    |
| --- | --- | --- |
|`BinaryOperator<T>`     |Represents an operation upon two operands of the same type, producing a result of the same type as the operands  (reference type)     |  	`T apply(T t, T u)`
|`DoubleBinaryOperator`     |Accepts two double-value operands and produces a double-value result     |  `double applyAsDouble(double left, double right)`
|`IntBinaryOperator`     |Accepts two int-value operands and produces an int-value result     |  `int applyAsInt(int left, int right)`
|`LongBinaryOperator`     |Accepts two long-value operands and produces a long-value result.     |  `applyAsLong(long left, long right)`  

This lesson explores the Binary operator functional interface in Java.

Introduction

Taste of lambdas

Stream API

Java 8 Concurrency API Improvements

Java Time API

The Way Forward

Binary operator

`BinaryOperator<T>`