Complex Object losing loses data or changes?

Complex Object losing loses data or changes?

I know references to objects in java are passed by copy , but the copy
still points to the same memory in system , so after updating some data of
the complex object in another function , the original data should me
maintained. But interestingly something is going wrong here. I am working
with Tries.
Here is my implementation of Trie, it's fairly custom implementation
because of some custom rules:
public class Trie {
boolean isEnd;
Trie trie[] = new Trie[256];
ArrayList<Integer> indexNode;
public static Trie createTrieNode() {
Trie temp = new Trie();
temp.isEnd = false;
temp.indexNode = new ArrayList<Integer>();
for (int i = 0; i < temp.trie.length; i++) {
temp.trie[i] = null;
}
return temp;
}
public static void insertIntoTrie(Trie root, char[] alpha, int index,
int i) {
if (root == null)
root = createTrieNode();
if (i < alpha.length)
insertIntoTrie(root.trie[alpha[i] - 'a'], alpha, index, i + 1);
else {
if (root.isEnd == true) {
root.indexNode.add(index);
} else {
root.isEnd = true;
root.indexNode.add(index);
}
}
}
}
Now my object root comes from this class and In the debugger I can see
this statement being executed : root.isEnd = true;
Class:
public class AnagramsTogether {
public Trie root = new Trie();
public void printAnagrams(String[] anagrams){
char[] buffer;
for (int i = 0; i < anagrams.length; i++) {
buffer = anagrams[i].toCharArray();
Arrays.sort(buffer);
Trie.insertIntoTrie(root, buffer, i, 0);
}
AnagramsUtil.anagramUtil(root,anagrams);
}
}
But when when root is passed here AnagramsUtil.anagramUtil(root,anagrams);
public class AnagramsUtil {
public static void anagramUtil(Trie root, String[] anagrams) {
if (root.isEnd == true) {
for (Iterator<Integer> iterator = root.indexNode.iterator();
iterator
.hasNext();) {
Integer integer = (Integer) iterator.next();
System.out.println(anagrams[integer]);
}
} else {
for (int i = 0; i < root.trie.length; i++) {
if (root.trie[i] == null)
continue;
anagramUtil(root.trie[i], anagrams);
}
}
}
}
This statement if (root.isEnd == true) in never executed and so is this is
never executed anagramUtil(root.trie[i], anagrams); . The program just
keep executing the continue statement. Which should not be the case as
I've already seen root.trie[i] receiving values. Why does this happen?I am
fairly new to java.