NYOJ之字符串逆序输出

 

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AC代码：

import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        
        Scanner sc=new Scanner(System.in);
        
        int times=Integer.parseInt(sc.nextLine());
        while(times-->0){
            String s=sc.nextLine();
            String ans=reverseExclusiveDigitAndSpace(s);
            System.out.println(ans);
        }
        
    }
    
    public static String reverseExclusiveDigitAndSpace(String s){
        StringBuilder sb=new StringBuilder(s.length());
        for(int i=s.length()-1;i>=0;i--){
            char c=s.charAt(i);
            if(Character.isLetter(c)) sb.append(c);
        }
        return sb.toString();
    }
    
}

题目来源： http://acm.nyist.net/JudgeOnline/problem.php?pid=266