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...!!! Share on X

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...!!! Share on X

Do you like this Post? – then check my other helpful posts:

Other Useful References:


  • Deepak Verma

    Deepak Verma is a Test Automation Consultant and Software development Engineer for more than 10 years. His mission is to help you become an In-demand full stack automation tester. He is also the founder of Techndeck, a blog and online coaching platform dedicated to helping you succeed with all the automation basics to advanced testing automation tricks. Verma Deepak