Compile Java File: JavaListSubListExample2

import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;

class Employee {

int id;
    String name;

public Employee(int id, String name) {
this.id = id;
this.name = name;
    }
public String toString()
    {
return this.id + " " + this.name ;

}
}
class SortById implements Comparator<Employee> {
// Used for sorting in ascending order of ID
public int compare(Employee a, Employee b)
    {
return a.id - b.id;
    }
}

// Main class
class JavaListSubListExample2 {
static int i=1;
public static void main (String[] args) {
        List<Employee> list = new ArrayList<Employee>();
        Employee employee1 = new Employee(15019, "Patanjali");
        Employee employee2 = new Employee(13198, "Geetanjali");
        Employee employee3 = new Employee(12112, "Anjali");
list.add(employee1);
list.add(employee2);
list.add(employee3);
System.out.println("Unsorted List : ");
for (Employee val : list) {
System.out.println(i++ +". "+val);
        }
Collections.sort(list, new SortById());
System.out.println();
System.out.println(" Sorted List : ");
int i=1;
for (Employee val : list) {
System.out.println(i++ +". "+val);
        }
    }
}

Output

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