要求当场写一个算法,倒序一个字符串,并且字符串中到空格有3个的,2个的,1个的;
Step1: 常见的算法就是倒序排一下,不考虑空格的。比如下面的将 i am a boy 倒序成boy a am i,其实有准备就简单得很
public class test { public static void main(String[] args){ String str2 = "I am a boy"; String[] words = str2.trim().split(" "); for(int i = words.length-1;i>=0;i--){ System.out.print(words[i]+" "); } } }
Step2: 加大一丢丢难度,需要考虑空格的数量,比如 i ⭕️⭕️⭕️am ⭕️⭕️a⭕️boy,倒序成boy⭕️⭕️⭕️a⭕️⭕️am⭕️i
import com.google.common.collect.Lists; import java.util.ArrayList; import java.util.Collections; import java.util.List; public class Sort { public static void main(String[] args) { String str = "i-am-a-boy"; String[] words = str.trim().split("-"); for (int i = words.length - 1; i >= 0; i--) { System.out.print(words[i] + "-"); } System.out.print("!!!注意多了一个-,是空格往往看不出来" + " "); String strb = "i-am-a-boy"; String[] wordb = strb.trim().split("-"); for (int i = wordb.length - 1; i >= 0; i--) { if (i == 0) { System.out.print(wordb[i]); } else System.out.print(wordb[i] + "-"); } System.out.print("修复了一下,将最后一个不输出-了" + " "); //下面是多个空格的处理方式 String str2 = "i---am--a-boy"; String[] words2 = str2.trim().split("-");//会有空字符串的出现 System.out.println("----字符串数组的长度是-----:" + words2.length); for (int i = words2.length - 1; i >= 0; i--) { if (i == 0) { System.out.println(words2[i]); } else System.out.print(words2[i] + "-"); } //思路是变成两个字符串数组, // 一个是有字符串(不为空)的列表list // 一个是记录---的数组;这边又考虑了两种方式,一种正则表达式截取字符串(how to),一种是数-的个数,怎么数,用上述数组中到空格 // 然后拼起来 //String newstr = str2.replace("-", " ");//使用库函数 String newstr2 = str2.replaceAll("[a-zA-Z]", "*");// System.out.println(newstr2); String newstr3 = newstr2.replace("-", "R");//使用 System.out.println(newstr3); //1 List<String> strlist = Lists.newArrayList(); for (int i = words2.length - 1; i >= 0; i--) { if (words2[i].length() != 0) {// strlist.add(words2[i]); } } System.out.println(strlist); String[] words3 = newstr3.trim().split("\*");//会有空字符串的出现 List<String> sinlist = Lists.newArrayList(); for (int i = 0; i <=words3.length-1; i++) { if (words3[i].length() != 0) {// sinlist.add(words3[i]); } } System.out.println(sinlist); //Collections.replaceAll(sinlist, "a", "-"); if(strlist.size()-1==sinlist.size()) {for(int i=0;i<=sinlist.size()-1;i++) {System.out.print(strlist.get(i)+sinlist.get(i));} System.out.print(strlist.get(strlist.size()-1)); } else System.out.println("那就尴尬了"); String aaa=""; if(strlist.size()-1==sinlist.size()) {for(int i=0;i<=sinlist.size()-1;i++) {aaa=aaa+(strlist.get(i)+sinlist.get(i));} aaa=aaa+strlist.get(strlist.size()-1); } else System.out.println("那就尴尬了"); aaa = aaa.replace("R", "-"); System.out.println(" "+aaa); } }
现在的测试大多是自动化测试才能生存,去网上查看了一些api自动化测试框架,各式各样的;
一般对测试的要求是熟悉Java/Python等一种编程语言,
熟悉是怎样的要求? 要求会写(开发怂了的时候你上啊),还是能看懂(比如一些代码review)?
上述用了一个R是为了看了更清楚,下面更新了一版
import java.util.List; import java.util.ArrayList; public class TestMain { public static void main(String[] args) { //下面是多个空格的处理方式 String str2 = "i---am--a-boy"; String[] words2 = str2.trim().split("-");//会有空字符串的出现 System.out.println("----字符串数组的长度是-----:" + words2.length); for (int i = words2.length - 1; i >= 0; i--) { if (i == 0) { System.out.println(words2[i]); } else System.out.print(words2[i] + "-"); } //思路是变成两个字符串数组, // 一个是有字符串(不为空)的列表list // 一个是记录---的数组;这边又考虑了两种方式,一种正则表达式替换掉字母字符(how to),一种是数-的个数,然后拼起来 String newstr2 = str2.replaceAll("[a-zA-Z]", "*");//将所有的字母字符替换成为*号 System.out.println(newstr2); //1 List<String> strlist = new ArrayList(); for (int i = words2.length - 1; i >= 0; i--) { if (words2[i].length() != 0) {//排除空字符串 strlist.add(words2[i]); } } System.out.println("第一种方式的结果:"+strlist); //2 String[] words2a = newstr2.trim().split("\*");//会有空字符串的出现 List<String> sinlist = new ArrayList(); for (int i = 0; i <=words2a.length-1; i++) { if (words2a[i].length() != 0) {// sinlist.add(words2a[i]); } } System.out.println("第二种方式的结果:"+sinlist); String final_str=""; if(strlist.size()-1==sinlist.size())//连接符必须少一位啊 { for(int i=0;i<=sinlist.size()-1;i++) { final_str = final_str +(strlist.get(i)+sinlist.get(i)); } final_str = final_str +strlist.get(strlist.size()-1); } else System.out.println("那就尴尬了"); System.out.println(" "+ final_str ); } }
import com.google.common.collect.Lists; import java.util.ArrayList; import java.util.List; public class Sort { public static void main(String[] args) { //下面是多个空格的处理方式 String str2 = "i---am--a-boy"; String[] words2 = str2.trim().split("-");//会有空字符串的出现 System.out.println("----字符串数组的长度是-----:" + words2.length); for (int i = words2.length - 1; i >= 0; i--) { if (i == 0) { System.out.println(words2[i]); } else System.out.print(words2[i] + "-"); } //思路是变成两个字符串数组, // 一个是有字符串(不为空)的列表list // 一个是记录---的数组;这边又考虑了两种方式,一种正则表达式替换掉字母字符(how to),一种是数-的个数, // 然后拼起来 String newstr2 = str2.replaceAll("[a-zA-Z]", "*");//将所有的字母字符替换成为*号 System.out.println(newstr2); //1 List<String> strlist = Lists.newArrayList(); for (int i = words2.length - 1; i >= 0; i--) { if (words2[i].length() != 0) {//排除空字符串 strlist.add(words2[i]); } } System.out.println(strlist); //2 String[] words2a = newstr2.trim().split("\*");//会有空字符串的出现 List<String> sinlist = Lists.newArrayList(); for (int i = 0; i <=words2a.length-1; i++) { if (words2a[i].length() != 0) {// sinlist.add(words2a[i]); } } System.out.println(sinlist); String aaa=""; if(strlist.size()-1==sinlist.size())//连接符必须少一位啊 {for(int i=0;i<=sinlist.size()-1;i++) {aaa=aaa+(strlist.get(i)+sinlist.get(i));} aaa=aaa+strlist.get(strlist.size()-1); } else System.out.println("那就尴尬了"); System.out.println(" "+aaa); } }