题目

去掉字符串中连续出现k 个0 的子串

java代码

package com.lizhouwei.chapter5;/** * @Description: 去掉字符串中连续出现k 个0 的子串 * @Author: lizhouwei * @CreateDate: 2018/4/23 21:34 * @Modify by: * @ModifyDate: */public class Chapter5_3 {    public String removeKZero(String str, int k) {        if (str == null) {            return null;        }        char[] chars = str.toCharArray();        int count = 0;        int start = -1;        for (int i = 0; i < chars.length; i++) {            if (chars[i] == '0') {                count++;                start = start == -1 ? i : start;            } else {                if (count == k) {                    while (count-- != 0) {                        chars[start++] = ' ';                    }                }                count = 0;                start = -1;            }        }        if (count == k) {            while (count-- != 0) {                chars[start++] = ' ';            }        }        return String.valueOf(chars);    }    //测试    public static void main(String[] args) {        Chapter5_3 chapter = new Chapter5_3();        String str = "A0000B000";        System.out.println("A0000B000 去除连续3个0：" + chapter.removeKZero(str, 3));    }}

结果