用Java反转给定的句子 [英] Reverse a given sentence in Java

问题描述

有谁能告诉我如何编写Java程序来反转给定的句子？

Can anyone tell me how to write a Java program to reverse a given sentence?

例如，如果输入是：

这是一个面试问题

"This is an interview question"

输出必须是：

问题采访是这个

"question interview an is this"

推荐答案

你用空格分割字符串，然后向后迭代它以组合反向句子。

You split the string by the space then iterate over it backwards to assemble the reversed sentence.

String[] words =  "This is interview question".split(" ");

String rev = "";
for(int i = words.length - 1; i >= 0 ; i--)
{
   rev += words[i] + " ";
}

// rev = "question interview is This "

// can also use StringBuilder:
StringBuilder revb = new StringBuilder();
for(int i = words.length - 1; i >= 0 ; i--)
{
   revb.append(words[i]);
   revb.append(" ");
}
// revb.toString() = "question interview is This "

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