《程序员代码面试指南》第五章 字符串问题 数组中两个字符串的最小距离

题目

数组中两个字符串的最小距离

java代码

package com.lizhouwei.chapter5;

/**
 * @Description: 数组中两个字符串的最小距离
 * @Author: lizhouwei
 * @CreateDate: 2018/4/25 20:30
 * @Modify by:
 * @ModifyDate:
 */
public class Chapter5_12 {
    public int minDistance(String[] strings, String str1, String str2) {
        if (str1 == null || str2 == null) {
            return -1;
        }
        if (str1.equals(str2)) {
            return 0;
        }
        int last1 = -1;
        int last2 = -1;
        int min = Integer.MAX_VALUE;
        for (int i = 0; i < strings.length; i++) {
            if (str1.equals(strings[i])) {
                last1 = i;
                min = Math.min(min, last2 == -1 ? min : last1 - last2);
            }
            if (str2.equals(strings[i])) {
                last2 = i;
                min = Math.min(min, last1 == -1 ? min : last2 - last1);
            }
        }
        return min == Integer.MAX_VALUE ? -1 : min;
    }

    //测试
    public static void main(String[] args) {
        Chapter5_12 chapter = new Chapter5_12();
        String[] str = {"1", "3", "3", "3", "2", "3", "1"};
        int result = chapter.minDistance(str, "1", "2");
        System.out.println("{"1","3","3","3","2","3","1"}中：");
        System.out.println("1和2的最小距离：" + result);
    }
}

结果