Java8: Lambdas & Streams

Photo by Mitchell Kmetz on Unsplash

When streams combined with lambdas we can do a lot with very few lines of codes. Let’s try to print below class using streams.

public class Person{
    String name;
    int age;
    Person(String name, int age){
        this.age=age;
        this.name=name;
    }
}

First we will convert the list to a stream and do a filter to find the names start with s. Then filtered results to be printed.

List<Person> list= Arrays.asList(
        new Person("nuwan",20),
        new Person("sen",30)
);

list.stream()
        .filter(person -> person.name.startsWith("s"))
        .forEach(person -> System.out.println(person.name));

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