Object Sorting to sort by string or integer by implementing comparable, comparator.

Write a program that use object sorting to sort by string or integer by  implementing comparable, comparator.

Program/Code:

Employee Class:

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import java.util.Comparator; public class employee implements Comparable<employee>, Comparator<employee> { // instance variable private String name; private int Id; // constructor employee() { } public employee(String name, int Id) { this.name = name; this.Id = Id; } // getter & setter method public String getName() { return name; } public void setName(String name) { this.name = name; } public int getId() { return Id; } public void setId(int Id) { this.Id = Id; } // compare method @Override public int compareTo(employee o) { int i; i = this.getName().compareTo(o.getName()); return i; } @Override public int compare(employee o1, employee o2) { return o1.Id - o2.Id; } }

EmployeeTest Class:

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import java.util.ArrayList; import java.util.Collections; public class Main { public static void main(String args[]) { ArrayList<employee> arr = new ArrayList<>(); arr.add(new employee("Ahmed", 5)); arr.add(new employee("Akram", 3)); arr.add(new employee("Shahid", 6)); arr.add(new employee("Jamshad", 7)); arr.add(new employee("Sabir", 9)); Collections.sort(arr); System.out.println("Compare by String\n id ---- Name"); for (int i = 0; i < arr.size(); i++) { System.out.println(arr.get(i).getId() + " " + arr.get(i).getName()); } Collections.sort(arr, new employee()); System.out.println("\n\nCompare by int\n id ---- Name"); for (int i = 0; i < arr.size(); i++) { System.out.println(arr.get(i).getId() + " " + arr.get(i).getName()); } } }

Result:

Compare by String
 id ---- Name
5    Ahmed
3    Akram
7    Jamshad
9    Sabir
6    Shahid


Compare by int
 id ---- Name
3    Akram
5    Ahmed
6    Shahid
7    Jamshad
9    Sabir