:: (double colon) operator in Java 8

Question

I was exploring the Java 8 source and found this particular part of code very surprising:

//defined in IntPipeline.java
@Override
public fin         


        

Answer 1

The :: is known as method references. Lets say we want to call a calculatePrice method of class Purchase. Then we can write it as:

Purchase::calculatePrice

It can also be seen as short form of writing the lambda expression Because method references are converted into lambda expressions.