MainClass.java Source code

Introduction

Here is the source code for MainClass.java

Source

/*
 Output:
    
Virginia, New York, Massachusetts
    
 * */

import java.util.TreeMap;

public class MainClass {
    public static void main(String args[]) {
        TreeMap map = new TreeMap();
        map.put("Virginia", "Richmond");
        map.put("Massachusetts", "Boston");
        map.put("New York", "Albany");
        map.put("Maryland", "Annapolis");

        if (!map.isEmpty()) {
            Object last = map.lastKey();
            boolean first = true;
            do {
                if (!first) {
                    System.out.print(", ");
                }
                System.out.print(last);
                last = map.headMap(last).lastKey();
                first = false;
            } while (last != map.firstKey());
            System.out.println();
        }
    }
}