https://github.com/jobbole/ProgrammingProjectList

• 逆轉字符串——輸入一個字符串，將其逆轉並輸出。

  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("請輸入一個字符串：");
          
   
  while(cin.hasNext()) {
              StringBuilder sb = new StringBuilder(cin.nextLine()); //定義可變長的線程不安全字符串
              //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("輸出逆轉後的字符串：" + sb1);
              System.out.println("請輸入一個字符串：");
          }
      }
  }

ProgrammingProjectList-文本操作