Learning RxJava

Making a Consumer a lambda

Consumer<T> accepts a T argument and performs an action with it but does not return any value. Using an anonymous class, we can create a Consumer<String> that simply prints the string as shown in the following code snippet: 

import java.util.function.Consumer;public class Launcher {    public static void main(String[] args) {        Consumer<String> printConsumer = new Consumer<String>() {            @Override            public void accept(String s) {                System.out.println(s);            }        };        printConsumer.accept("Hello World");    }}

The output is as follows:

Hello World

You can implement this as a lambda. We can choose to call the String parameter s on the left-hand side of the lambda arrow -> and print it on the right-hand side: 

 

import java.util.function. ...