Compile and Execute Java Online

package com.india.sachin;
import java.util.*;
import java.util.stream.*;


class Student
{
    int age;
    String name;
    int marks;
    
    
    public Student(int age,String name,int marks)
    {
        
        this.age=age;
        this.name=name;
        this.marks=marks;
        
    }
    public int getAge() {
		return age;
	}


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


	public String getName() {
		return name;
	}


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


	public int getMarks() {
		return marks;
	}


	public void setMarks(int marks) {
		this.marks = marks;
	}
	

    
    
}

public class HelloWorld
{
    
    
    public static void main(String[] args)
    {
        
        
        ArrayList<Student> al=new ArrayList<Student>();
        
        
        al.add(new Student(27,"sachin",78));
        al.add(new Student(26,"nitin",45));
        
      /*  
        al.forEach((n)->System.out.println(n.age+" "+n.name));
        
        
        al.forEach(
            
           (m)->System.out.println(m.marks)
            
            );
      */      
            
         /*   al.stream().filter(p->p.age>26).forEach((p)->System.out.println(p.age+" "+p.name+" "+p.marks));
         */   
            
            Set<Integer> set=al.stream().filter(p->p.age>26).map(p->p.age).collect(Collectors.toSet());
            
            
        for(int a:set)
        {
       //     System.out.println(a);
        }
        
        
        Set<Student> set1=al.stream().sorted(new Comparator<Student>()
        {
            public int compare(Student s1,Student s2)
            {
                if(s1.getAge()<s2.getAge())
                {
                    return 1;
                }
                else if(s1.getAge()>s2.getAge())
                {
                    return -1;
                }
                else
                {
                    return 0;
                }
            }
        }
        
        ).collect(Collectors.toSet());
        
    
                set1.forEach((n)->System.out.println(n.age+" "+n.name+" "+n.marks));
                
    Map<Integer,String> ma=al.stream().collect(Collectors.toMap(m->m.age,m->m.name));            
                
        System.out.println(ma);        
                
    }
    
    
}