Predicate : Functional Interface Java 8

Introduction

In this tutorial we will look at the use of Predicate a functional interface introduced in java 8.

Refer The video Tutorial for detail

Use Case 

Predicate is a functional interface which is used for returning boolean value based on some data.The sample code is shown below.

//return boolean value Predicate<String> pred=new Predicate<String>() { @Override public boolean test(String str) { return str.length()>10; } }

The above case will return true if the string passed to the method will have length grater than 10.

Conclusion 

In this tutorial we saw the use case of functional interface - Predicate. which is introduced in java 8 to get the boolean result.