ProgrammingProjectList-文本操作

https://github.com/jobbole/ProgrammingProjectList

• 逆转字符串——输入一个字符串，将其逆转并输出。

  package com.zrl.github;
  
  import java.util.Scanner;
  
  public class ReverseString {
  
      public static void main(String[] args) {
  
          Scanner cin = new Scanner(System.in);
  
          System.out.println("请输入一个字符串：");
  
          while(cin.hasNext()) {
  
              StringBuilder sb = new StringBuilder(cin.nextLine()); //定义可变长的线程不安全字符串
  
              //sb.reverse();
  
              String sb1 = "";
  
              int n = sb.length();
  
              for(int i=0; i<n; i++) {
  
                  char x = sb.charAt(n-i-1);
  
                  sb1 += x;
  
              }
  
              System.out.println("输出逆转后的字符串：" + sb1);
  
              System.out.println("请输入一个字符串：");
  
          }
  
      }
  
  }