Sorting of city names in alphabetical order using the Bubble Sort technique - ICSE BOARD QUESTION 2008

/**

 * Define a class and store the given city names in a single dimensional array. Sort these names in alphabetical order

 * using the Bubble Sort technique only.

 * INPUT: Delhi, Bangalore, Agra, Mumbai, Calcutta

 * OUTPUT: Agra, Bangalore, Calcutta, Delhi, Mumbai

 */

import java.io.*;
class question2008
{
    public static void main(String args[]) throws IOException
    {
        String words[]= {"Delhi", "Bangalore", "Agra", "Mumbai", "Calcutta"};
        BufferedReader br=new BufferedReader(new InputStreamReader(System.in));       
       
        int len=words.length;
        int i,j;
        String t;
       
        for(i=0; i<len-1; i++)
        {
            for(j=0; j<len-1-i; j++)
            {
                if(words[j].compareTo(words[j+1])>0)
                {
                    t=words[j+1];
                    words[j+1]=words[j];
                    words[j]=t;
                }
            }
        }
        System.out.println("The cities in alphabetical order are : ");
        for(i=0; i<len; i++)
        {
            System.out.print(words[i]+ " ");
        }
    }
}