Write code to generate Sub Words
//package com.book2s; import java.util.LinkedHashSet; import java.util.Set; public class Main { public static void main(String[] argv) { String word = "book2s.com"; int length = 2; System.out.println(generateSubWords(word, length)); }//from w w w . j a v a 2 s.c o m public static Set<String> generateSubWords(String word, int length) { if (length > word.length()) throw new IllegalArgumentException("The word '" + word + "' length cannot be less than the length " + length + " of the words to be generated."); // LinkedHashSet maintains the order. if there are multiple common substrings the left most should match first. Set<String> generatedWords = new LinkedHashSet<>(); for (int i = 0; i <= (word.length() - length); i++) generatedWords.add(word.substring(i, length + i)); return generatedWords; } }