palindromeTest布尔方法始终返回false的排查请求（需自行解决）

Hey there! Let's walk through some targeted checks to help you debug why your palindromeTest method is always returning false—no direct solutions, just pointers to help you work it out on your own.

Key Areas to Investigate #

• Validate the justNumbers output: Before even checking the palindrome logic, make sure your phone number is being stripped of non-digit characters correctly. Add a System.out.println(phoneNumber); right after the line phoneNumber = justNumbers(phoneNumber); to print the cleaned-up string. Does it match the pure-digit version you expect for your test case (like 5656776565 for (565) 677-6565)?

• Dig into the palindromeTest logic: Look closely at these lines in your method:

  StringBuffer reversedNumber = new StringBuffer(pNumber);
  reversedNumber.reverse().toString();
  if(pNumber.equals(reversedNumber)) {
  

  Ask yourself these questions:

  • When you call reverse() on a StringBuffer, does it modify the existing buffer or return a new one?
  • You're calling toString() after reversing—what does this method return, and are you storing or using that returned value anywhere?
  • What happens when you compare a String (like pNumber) directly to a StringBuffer (like reversedNumber) using the equals() method? Are these two types compatible for this kind of comparison?

Taking the time to test each of these points step by step should help you spot the issue in your code.

内容的提问来源于stack exchange，提问作者Isa