Java说一切都是回文

Question

我正在编写一个程序，从一个文件中读取文本，然后确定它是否是回文。唯一的问题是，它认为一切都是一体的。这是我的代码：

   String input = "";
   String reversed = "";
   String answer = "";
   int count = 0;
   int low = 0;
   int high = input.length() - 1;

   outF.println("Palindrome   Input String            New String");

   while (inF.hasNext()){
       input=inF.nextLine();
       reversed = new StringBuffer(input).reverse().toString();
        boolean isPalindrome;
       while (low < high) {
         isPalindrome = true;
           if (input.charAt(low) != input.charAt(high)) {
            isPalindrome = false;
            break;
         }
         low++;
         high--;

       }
       if (isPalindrome = true){
          answer = "yes";}
       else{
           answer = "no";}

       outF.printf("  %-10s %-23s %s %n", answer, input.trim(), reversed.trim());

       count++;
   }

下面是我的输出：

Palindrome   Input String            New String
  yes        STAR RATS               STAR RATS 
  yes        STAT                    TATS 
  yes        LEVEL                   LEVEL 
  yes        MALAYALAM               MALAYALAM 
  yes        Solos                   soloS 
  yes        kaya                    ayak 
  yes        Radar                   radaR 
  yes        Regal lageR             Regal lageR 
  yes        Straw wartS             Straw wartS 
  yes        RSTUVWXYZXWVUTSR        RSTUVWXZYXWVUTSR 
  yes        DeifieD                 DeifieD 
  yes        ABBA                    ABBA 
  yes        mama anna mama          amam anna amam 
  yes        noel leon               noel leon 
  yes        Racecar                 racecaR 
  yes        galleonnoelag           galeonnoellag 
end of program 16 strings were processed

有人知道是什么引起的吗？我在按照我的书上说的去做，找出某件事是不是回文，它是

我移动了一些东西，使其看起来像这样：布尔isPalindrome=true；while（低<高）{

           if (input.charAt(low) != input.charAt(high)) {
            isPalindrome = false;
            break;
         }
         low++;
         high--;

       }
       if (isPalindrome ){
          answer = "yes";}
       else{
           answer = "no";}

       outF.printf("  %-10s %-23s %s %n", answer, input.trim(), reversed.trim());

       count++;

但它仍然没有起作用。如果我让它保持原样，它会试图说isPalindrome没有定义。

Answer 1

while (inF.hasNext()){
   input=inF.nextLine();
   reversed = new StringBuffer(input).reverse().toString();
    boolean isPalindrome;
int low = 0;
int high = input.length() - 1;

   while (low < high) {
     isPalindrome = true;
       if (input.charAt(low) != input.charAt(high)) {
        isPalindrome = false;
        break;
     }
     low++;
     high--;

   }

在while循环中声明low和high变量。