letcode查找字符串中的最长回文串(JAVA)

public static String longestPlalindrome(String originalStr){
 
         String   resultStr= "";
 
         for(int i=0;i<originalStr.length();i++){
             int left=i-1;
             int right=i+1;
             while (left>=0 && right<=originalStr.length()-1 && originalStr.charAt(left) == originalStr.charAt(right)){
                 left--;
                 right++;
             }
             String  str=right-left>2?originalStr.substring(left+1,right):"";
             resultStr=str.length()>resultStr.length()?str: resultStr;
         }
 
        for(int i=0;i<originalStr.length();i++){
            int left=i;
            int right=i+1;
            while (left>=0 && right<=originalStr.length()-1 && originalStr.charAt(left) == originalStr.charAt(right)){
                left--;
                right++;
            }
            String  str=right-left>2?originalStr.substring(left+1,right):"";
            resultStr=str.length()>resultStr.length()?str: resultStr;
        }
         return resultStr;
    }