java - 反转字符串。每隔一个字倒转

Question

所以我有一个 for 循环，它反转字符串中的每个其他单词。我无法确定是哪种情况导致了这种情况。

for (int i = 0; i < words.length; i++) 
{
    stringBuilder.append(words[(words.length-1)-i]);
    stringBuilder.reverse()
}
newMessage = stringBuilder.toString();
return Message

Answer 1

stringBuilder.reverse() 在每次迭代时反转您当前构建的整个字符串。

尝试:

for (int i = 0 ; i < words.length ; i++) {
    String word = words[(words.length-1)-i];
    String reverse = new StringBuilder(word).reverse().toString();
    stringBuilder.append(reverse).append(" ");
}

或者更简单，在最后反转:

for (int i = 0 ; i < words.length ; i++) {
    stringBuilder.append(words[(words.length-1)-i]).append(" ");
}
newMessage = stringBuilder.reverse().toString();

根据评论编辑:

for (String w : words) {
    String reverse = new StringBuilder(w).reverse().toString();
    stringBuilder.append(reverse).append(" ");
}
newMessage = stringBuilder.toString();