Java 8 - Example Program for Predicate, Function & Consumer

Example Program Predicate, Function & Consumer:
class Student
{
String name;
int marks;
Student(String name,int marks)
{
this.name=name;
this.marks=marks;
}
}

class Test
{
public static void main(String[] args)
{
ArrayList<Student> l= new ArrayList<Student>();
populate(l);
Predicate<Student> p= s->s.marks>=60;
Function<Student,String> f=s->{
int marks=s.marks;
if(marks>=80)
{
return "A[Dictinction]";
}
else if(marks>=60)
{
return "B[First Class]";
}
else if(marks>=50)
{
return "C[Second Class]";
}
else if(marks>=35)
{
return "D[Third Class]";
}
else
{
return "E[Failed]";
}
};
Consumer<Student> c=s->{
System.out.println("Student Name:"+s.name);
System.out.println("Student Marks:"+s.marks);
System.out.println("Student Grade:"+f.apply(s));
System.out.println();
};
for(Student s : l)
{
if(p.test(s))
{
c.accept(s);
}
}
}
public static void populate(ArrayList<Student> l)
{
l.add(new Student("Sunny",100));
l.add(new Student("Bunny",65));
l.add(new Student("Chinny",55));
l.add(new Student("Vinny",45));
l.add(new Student("Pinny",25));
}
}
Output:
Student Name:Sunny
Student Marks:100
Student Grade:A[Dictinction]

Student Name:Bunny
Student Marks:65
Student Grade:B[First Class]