Click here to watch in Youtube :
https://www.youtube.com/watch?v=muIXC2upDak&list=UUhwKlOVR041tngjerWxVccw
Person.java
https://sites.google.com/site/ramj2eev1/home/javabasics/StreamDemo_distinct_sort_name_age.zip?attredirects=0&d=1
Github Link:
https://github.com/ramram43210/Java/tree/master/BasicJava/StreamDemo_distinct_sort_name_age
Bitbucket Link:
https://bitbucket.org/ramram43210/java/src/be359fe3814dad173cc81feb4c27726905fff42e/BasicJava/StreamDemo_distinct_sort_name_age/?at=master
See also:
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https://www.youtube.com/watch?v=muIXC2upDak&list=UUhwKlOVR041tngjerWxVccw
Person.java
enum Gender { MALE, FEMALE } public class Person implements Comparable<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; } public int compareTo(Person another) { return this.age - another.getAge(); } @Override public String toString() { return "Person [name=" + name + ", gender=" + gender + ", age=" + age + "]"; } }StreamDistinctDemo1.java
import java.util.ArrayList; import java.util.List; public class StreamDistinctDemo1 { 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, 15)); 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, 15)); /* * The distinct() operation returns a stream consisting of the distinct * elements (no duplicates) by comparing objects via their equals() * method. * * Combining with the map and sorted operations, the following code * shows distinct age of the persons in the above list, and sorts them * in asc order: * */ personList.stream().mapToInt(p -> p.getAge()).distinct().sorted() .forEach(System.out::println); } }Output
15 19 23StreamDistinctDemo2.java
import java.util.Arrays; public class StreamDistinctDemo2 { public static void main(String[] args) { int[] numberArray = { 10, 10, 20, 20, 20 }; /* * The following code returns a stream of distinct numbers from an * array source */ Arrays.stream(numberArray).distinct() .forEach(i -> System.out.print(i + " ")); } }Output
10 20Click the below link to download the code:
https://sites.google.com/site/ramj2eev1/home/javabasics/StreamDemo_distinct_sort_name_age.zip?attredirects=0&d=1
Github Link:
https://github.com/ramram43210/Java/tree/master/BasicJava/StreamDemo_distinct_sort_name_age
Bitbucket Link:
https://bitbucket.org/ramram43210/java/src/be359fe3814dad173cc81feb4c27726905fff42e/BasicJava/StreamDemo_distinct_sort_name_age/?at=master
See also:
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