题解 | #字符逆序#

import java.util.*;
//将字符串转成charArray,然后使用交换法来完成反转
public class Main{
    public static void main(String[] args){
        Scanner scanner = new Scanner(System.in);
        String str = scanner.nextLine();
        char[] charArray = str.toCharArray();
        int i = 0;
        int j = charArray.length-1;
        char temp;
        while(i < j){
            temp = charArray[i];
            charArray[i] =charArray[j];
            charArray[j] = temp;
            i++;
            j--;
        }
        System.out.println(new String(charArray));
    }
}