打印字符串反向

Question

我想寫一個程序，當用戶輸入「asdfg」程序應打印「gfdsa」我該如何做到這一點？我不知道這件事。

String s; 
String rev; 

Scanner sc = new Scanner (System.in); 

System.out.println ("Enter 's' String : "); 
s = sc.next(); 

System.out.println ("reverse of " + s + " equal to " + rev); 

Answer 1

試試這個，它會工作

 string input = "sample text"; 
     char[] outputArray = input.ToCharArray();   
     Array.Reverse(outputArray); 
     Console.WriteLine(outputArray); 

Answer 2

嘗試

System.out.println ("reverse of " + s + " equal to " + new StringBuilder(s).reverse().toString());