648 | Replace Words | Java

Java/ReplaceWords648.java

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+public class ReplaceWords648 {
+    public String replaceWords(List<String> dictionary, String sentence) {
+        String result = "";
+        String[] splitSentence = sentence.split(" ");
+        for (String word:splitSentence) {
+            result += " " + getRoot(word, dictionary);
+        }
+        return result.substring(1,result.length());
+    }
+
+    public String getRoot(String word, List<String> dictionary) {
+        int len = word.length();
+        String rootResult = "";
+        for (String root:dictionary) {
+            if (word.length() < root.length())
+                continue;
+            if ((word.substring(0,root.length())).equals(root) && root.length() < len){
+                rootResult = root;
+                len = root.length();
+            }
+        }
+        if (rootResult.equals(""))
+            return word;
+        return rootResult;
+    }
+}