DoubleSupplier 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 doesn’t expect any input but produces a double-valued output. In this post, we are going to see several implementations of DoubleSupplier Interface by using different examples.


DoubleSupplier Interface in Java 8 Examples...!!! Click To Tweet

Look at DoubleSupplier Javadoc description below:


As you’ve seen in the above screenshot, DoubleSupplier Interface contains only the following function:

double getAsDouble();

This method represents a supplier of double-valued results. This is the
double-producing primitive specialization of Supplier.


Java 8 DoubleSupplier 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.

DoubleSupplier Interface in Java 8 Examples...!!! Click To Tweet

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