Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.function.Predicate;

public class Main {
    public static void main(String[] args) {
        Predicate<Student> isPaidEnough = e -> e.gpa > 1;
        Predicate<Student> isExperiencedEnough = e -> e.id < 10;

        List<Student> students = Arrays.asList(new Student(1, 3, "John"), new Student(2, 4, "Jane"),
                new Student(3, 3, "Jack"));

        System.out.println(findStudents(students, isPaidEnough));
        System.out.println(findStudents(students, isExperiencedEnough));
        System.out.println(findStudents(students, isExperiencedEnough.and(isPaidEnough)));

        Student somebody = students.get(0);
        System.out.println(findStudents(students, Predicate.<Student>isEqual(somebody)));
    }

    private static List<Student> findStudents(List<Student> employees, Predicate<Student> condition) {
        List<Student> result = new ArrayList<>();

        for (Student e : employees) {
            if (condition.test(e)) {
                result.add(e);
            }
        }
        return result;
    }
}

class Student {
    public int id;
    public long gpa;
    public String name;

    Student(int id, long g, String name) {
        this.id = id;
        this.gpa = g;
        this.name = name;
    }

    @Override
    public String toString() {
        return id + ">" + name + ": " + gpa;
    }
}