java判断句号是否对称_Java判断是否回文，忽略标点和空格部分怎么写？

publicclassPalindrome{staticprivateStringtext;staticprivateintfirstIndex;staticprivateintlastIndex;publicstaticbooleanisPalindrome(Stringtext,intfirstIndex,intlastIndex){...

public class Palindrome

{

static private String text;

static private int firstIndex;

static private int lastIndex;

public static boolean isPalindrome(String text, int firstIndex,int lastIndex)

{

text = text.toLowerCase();

firstIndex = 0;

lastIndex = text.length()-1;

for( int i=0; i < text.length(); i++)

{

char letter = text.charAt(i);

if(character.isLetterOrDigit(letter)

这里 我要忽略标点和空格部分，但是怎么继续写下去呢？？

}

if (firstIndex >= lastIndex)

return true; // Base Case

else if (text.charAt(firstIndex) != text.charAt(lastIndex))

return false;

else

{

return isPalindrome(text, firstIndex + 1, lastIndex -1);

}

}

}

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