LeetCode-Word Break

 1 public class Solution {
 2     public boolean wordBreak(String s, Set<String> dict) {
 3         boolean[] break = new boolean[s.length()+1];
 4         break[0] = true;
 5 
 6         for (int i=1;i<=s.length();i++){
 7             StringBuilder builder = new StringBuilder;
 8             for (int j=i-1;j>=0;j++){
 9                 builder.insert(0,s.charAt(j));
10                 String word = builder.toString();
11                 if (dict.contains(word) && break[j]) {
12                     break[i] = true;
13                     break;
14                 }
15             }
16         }
17 
18         return break[s.length()];
19     }
20 }