Click here to watch in Youtube :https://www.youtube.com/watch?v=X0GijMsrDYM&list=UUhwKlOVR041tngjerWxVccwPerson.javapublic class Person
{
private int id;
private String name;
private int age;
public Person(int id, String name, int age)
{
super();
this.id = id;
this.name = name;
this.age = age;
}
public int getId()
{
return id;
}
public void setId(int id)
{
this.id = id;
}
public String getName()
{
return name;
}
public void setName(String name)
{
this.name = name;
}
public int getAge()
{
return age;
}
public void setAge(int age)
{
this.age = age;
}
@Override
public String toString()
{
return "Person [id=" + id + ", name=" + name + ", age=" + age
+ "]";
}
}
StreamDemo.javaimport java.util.Arrays;
import java.util.List;
/**
*
* How to convert Stream<Person> to Stream<String> using map method of
* Stream.
*
*/
public class StreamDemo
{
public static void main(String[] args)
{
List<Person> personList = Arrays.asList(new Person(1, "Ram", 25),
new Person(2, "Peter", 31),
new Person(3, "Steve", 25),
new Person(4, "Balu", 32));
String name = personList.stream() //convert list to stream
.filter(x -> "Peter".equals(x.getName())) // we want "Peter" only
.map(Person::getName) //convert Stream<Person> to Stream<String>
.findAny() // If 'findAny' then return found
.orElse(null); // If not found, return null
System.out.println(name);
}
}
OutputPeter
Click the below link to download the code:https://sites.google.com/site/ramj2eev1/home/javabasics/StreamDemo_map_app.zip?attredirects=0&d=1Github Link:https://github.com/ramram43210/Java/tree/master/BasicJava/StreamDemo_map_appBitbucket Link:https://bitbucket.org/ramram43210/java/src/c8efc47167637d9bcc657c3cee2ad048e22a2b17/BasicJava/StreamDemo_map_app/?at=masterSee also: All JavaEE Viedos PlaylistAll JavaEE ViedosAll JAVA EE LinksServlets TutorialAll Design Patterns LinksJDBC TutorialJava Collection Framework TutorialJAVA TutorialKids Tutorial