DoubleConsumer Interface is a part of the java.util.function package which is introduced in Java 8. It is an in-built Functional Interface. This function expects a single double-valued argument as an input and produces no output. In this post, we are going to see several implementations of DoubleConsumer Interface by using different examples.


DoubleConsumer Interface in Java 8 with Examples...!!! Click To Tweet

Look at DoubleConsumer Javadoc description below:


DoubleConsumer Interface contains 2 methods:

  1. accept 

  2. andThen

Let’s discuss these methods:


This method accepts one input argument and performs operation on the given argument.

Below is an example to demonstrate accept() method:

Example 1. ‘accept’ method


This method returns a composed DoubleConsumer that performs, in sequence, this operation followed by the after operation. If performing either operation throws an exception, it is relayed to the caller of the composed operation. If performing this operation throws an exception, the after operation will not be performed.

Below is an example to demonstrate andThen() method:

Example 2. ‘andThen’ method

Java 8 DoubleConsumer Interface is an absolute useful addition as part of ‘Functional Interfaces’ and can serve variety of purposes. It is quite powerful as it can be used as a higher order functions through lambda functions and above examples could help you to get better idea on how to implement it.

DoubleConsumer Interface in Java 8 with Examples...!!! Click To Tweet

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