题解 | #反转字符串#

/**
字符串装字符数组处理，双指针交换两指针的值

 public static String solve (String str) {
        // write code here
        char[] chars = str.toCharArray();
        int l=0;
        int r=chars.length-1;
        while (l<r){
            char temp=' ';
            temp=chars[r];
            chars[r]=chars[l];
            chars[l]=temp;
            l++;r--;
        }
        return new String(chars);
    }