[LeetCode]Shortest Word Distance III

public class Solution {
    public int shortestWordDistance(String[] words, String word1, String word2) {
        int pre1 = -1;
        int pre2 = -1;
        int result = Integer.MAX_VALUE;
        for (int i = 0; i < words.length; i++) {
            int tmp = pre1;
            if (word1.equals(words[i])) {
                if (pre2 != -1)
                    result = Math.min(result, i - pre2);
                pre1 = i;
            }
            if (word2.equals(words[i])) {
                if (tmp != -1)
                    result = Math.min(result, i - tmp);
                pre2 = i;
            }
        }
        return result;
    }
}