Java实现字典树
package D0726;public class T { public static void main(String[] args) { String[] str = { "asdf", "asji", "bjkl", "cdsdf", "jdsfk" }; Trie root = new Trie(); for (String s : str) { insert(root, s); } if (find(root, "asdf")) { System.out.println("string is found~"); } else { System.out.println("not found~"); } } public static void insert(final Trie root, String str) { Trie cur = root; for (char ch : str.toCharArray()) { int idx = ch - 'a'; if (cur.child[idx] == null) { cur.child[idx] = new Trie(); } cur = cur.child[idx]; cur.ch = ch; } } public static boolean find(final Trie root, String str) { Trie cur = root; for (char ch : str.toCharArray()) { int idx = ch - 'a'; if (cur.child[idx] == null) { return false; } cur = cur.child[idx]; } return true; }}class Trie { Trie[] child; char ch; public Trie() { child = new Trie[26]; }}