Wednesday 4 October 2017

How to use skip method of Java 8 Stream | Streams in Java 8


Click here to watch in Youtube : 
https://www.youtube.com/watch?v=Bq9w8pNg2pI&list=UUhwKlOVR041tngjerWxVccw

Person.java
enum Gender
{
    MALE, FEMALE
}

public class Person
{
    private String name;
    private String email;
    private Gender gender;
    private int age;

    public Person(String name, String email, Gender gender, int age)
    {
        super();
        this.name = name;
        this.email = email;
        this.gender = gender;
        this.age = age;
    }

    public String getName()
    {
        return name;
    }

    public void setName(String name)
    {
        this.name = name;
    }

    public String getEmail()
    {
        return email;
    }

    public void setEmail(String email)
    {
        this.email = email;
    }

    public Gender getGender()
    {
        return gender;
    }

    public void setGender(Gender gender)
    {
        this.gender = gender;
    }

    public int getAge()
    {
        return age;
    }

    public void setAge(int age)
    {
        this.age = age;
    }

    
    @Override
    public String toString()
    {
        return "Person [name=" + name + ", gender=" + gender + ", age=" + age
                + "]";
    }

}
StreamSkipDemo.java
import java.util.ArrayList;
import java.util.List;

public class StreamSkipDemo
{
    public static void main(String[] args)
    {
        List<Person> personList = new ArrayList<>();

        personList.add(new Person("Alice", "alice@gmail.com", Gender.FEMALE, 15));
        personList.add(new Person("Bob", "bob@gmail.com", Gender.MALE, 16));
        personList.add(new Person("Carol", "carol@gmail.com", Gender.FEMALE, 23));
        personList.add(new Person("David", "david@gmail.com", Gender.MALE, 19));
        personList.add(new Person("Eric", "eric@gmail.com", Gender.MALE, 17));

        /*
         * The skip() operation returns a stream containing the remaining
         * elements after discarding the first n elements of the stream.
         * 
         */
        personList.stream().skip(2).forEach(System.out::println);
    }

}
Output
Person [name=Carol, gender=FEMALE, age=23]
Person [name=David, gender=MALE, age=19]
Person [name=Eric, gender=MALE, age=17]

Click the below link to download the code:
https://sites.google.com/site/ramj2eev1/home/javabasics/StreamDemo_skip_persons.zip?attredirects=0&d=1

Github Link:
https://github.com/ramram43210/Java/tree/master/BasicJava/StreamDemo_skip_persons

Bitbucket Link:
https://bitbucket.org/ramram43210/java/src/be359fe3814dad173cc81feb4c27726905fff42e/BasicJava/StreamDemo_skip_persons/?at=master
See also:
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  • Java Collection Framework Tutorial
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