Sort a List having Employee objects using Java 8

Before using Stream API lets do it using normal java way.
Suppose you have below Employee class:

class Employee{
    int age;
    String name;
    public Employee(int age, String name) {
        this.age=age;
        this.name=name;
    }
    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 String toString() {
        return String.valueOf(age) + "-" +name;
    }
}

Have a helper which implements Comparator interface like below:

class EmployeeAgeComparator implements Comparator{
    
    public int compare(Object o1, Object o2) {
        Employee e1=(Employee)o1;
        Employee e2=(Employee)o2;        
        return e1.age - e2.age;        
    }
}

In client class:

public class Manager{
    public static void main(String[] args) {                
        List<Employee> list=new ArrayList();
        list.add(new Employee(41,"Pressy"));
        list.add(new Employee(10,"Paddy"));
        list.add(new Employee(35,"Ashy"));         
        
        System.out.println("Before sort:"+ list);
        Collections.sort(list, new EmployeeAgeComparator()); //To sort by Age.
        System.out.println("After sort:" + list);        
    }    
}

Now lets see how we can do the same using Java 8 Streams API.
Now you don’t need the helper class like above. So, the client class would look like below:

public class Manager {
	
	public static void main(String[] args) {
		Employee e1=new Employee(41,"Pressy");
        Employee e2=new Employee(10,"Paddy");
        Employee e3=new Employee(35,"Ashy");
        Employee e4=new Employee(41,"Saro");
                
        List<Employee> list=new ArrayList();
        list.add(e1);
        list.add(e2);
        list.add(e3);
        list.add(e4); 
        
        System.out.println("Before sort:"+ list);
        System.out.println("After sort:");
        
        Comparator<Employee> comparator1=(x,y) -> x.getAge() - y.getAge();        
        list.stream().sorted(comparator1).forEach(System.out::println); 
	}	
}

Sorting a Stream by Multiple Fields in Java:

public class Manager {
	
	public static void main(String[] args) {
		Employee e1=new Employee(41,"Pressy");
        Employee e2=new Employee(10,"Paddy");
        Employee e3=new Employee(35,"Ashy");
        Employee e4=new Employee(41,"Saro");
                
        List<Employee> list=new ArrayList();
        list.add(e1);
        list.add(e2);
        list.add(e3);
        list.add(e4); 
        
        System.out.println("Before sort:"+ list);
        System.out.println("After sort:");
        
        Comparator<Employee> comparator1=(x,y) -> x.getAge() - y.getAge();
        Comparator<Employee> comparator2=(x,y) -> x.getName().compareTo(y.getName());
        
        list.stream().sorted(
        		comparator1
        		.thenComparing(comparator2)
        		).forEach(System.out::println); 
	}	
}