缺少Java中的return语句错误 [英] Missing return statement error in Java

问题描述

我目前正在用Java编写一个回文测试员，用于我高中时的课程。我已经向老师求助了，他也很困惑。我希望stackoverflow上的社区可以帮助我。谢谢。

I am currently writing a palindrome tester in Java for a class I am taking in high school. I have asked my teacher for assistance and he is also confused as well. I was hoping the community on stackoverflow could help me out. Thank you.

public class Palindrome
{
    private String sentence;
    public Palindrome(String s)
    {
        sentence = s;
    }

    public boolean isPalindrome()
    {
        if(sentence.length() <= 1)
        {
            return true;
        }

        if(sentence.charAt(0) == sentence.charAt(sentence.length()-1))
        {
            sentence = sentence.substring(1, sentence.length()-1);
            isPalindrome();
        }
        else
            return false;
    }

}

推荐答案

您需要 return isPalindrome（）; 。否则该方法在这种情况下不返回任何内容，并且声明它返回一个布尔值。

You need return isPalindrome();. Otherwise the method isn't returning anything in that case, and it's declared to return a boolean.

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