Java Stream Example: Filtering Collection by using Stream

package streamconcept;

public class Student {

           

            int sid;

            String sname;

            float marks;

            public Student(int sid, String sname, float marks) {

                        super();

                        this.sid = sid;

                        this.sname = sname;

                        this.marks = marks;

            }

           

}

package streamconcept;

import java.util.ArrayList;

import java.util.List;

public class StudentData {

               

                public List<Student> getData()

                {

                                List<Student> l=new ArrayList<>();

                                Student s1=new Student(101, "govind", 455.00f);

                                Student s2=new Student(102, "rishabh", 435.00f);

                                Student s3=new Student(103, "murari", 460.00f);

                              Student s4=new Student(101, "murlidhar", 433.00f);

                                Student s5=new Student(101, "satyam", 470.00f);

                                l.add(s1);

                                l.add(s2);

                                l.add(s3);

                                l.add(s4);

                                l.add(s5);

                               

                                return l;

                               

                               

                }}

package streamconcept;

import java.util.List;

import java.util.stream.Collectors;

public class StudenClient {

           

            public static void main(String[] args) {

                        StudentData sd=new StudentData();

                        List<Student> ss = sd.getData();

                        List<Float> marks=ss.stream()

                                                .filter(s->s.marks>450)//filtering data

                                                .map(m->m.marks)//fetching data

                                                .collect(Collectors.toList());//collecting as list

                                System.out.println(marks);

                       

            }

}

o/p:------------------------

[455.0, 460.0, 470.0]