Sorts an mapped array

Sorter.java

import java.util.Iterator;
import java.util.Map;
import java.util.Set;
import java.util.SortedMap;
import java.util.TreeMap;

public class Sorter {
    SortedMap<Integer, String> sm = new TreeMap<>();
    Set s = sm.entrySet();
    /**
     * Constructor
     */
    public Sorter() {
        sm.put(2, "java");
        sm.put(3, "python");
        sm.put(1, "pearl");
        sm.put(4, "c");
        this.doit();
    }

    /**
     * Does it all
     */
    public void doit() {
        Iterator i = this.s.iterator();
        if (i.hasNext()) {
            do {
                Map.Entry m = (Map.Entry) i.next();

                int key = (Integer) m.getKey();
                String value = (String) m.getValue();

                System.out.println("Key: " + key + " value: " + value);
            } while (i.hasNext());
        }
    }
}