s.charAt(low) != s.charAt(high)这段代码看不懂，麻烦各位大神帮忙

Question

package programList;
import java.util.Scanner;
public class P5_14判断回文串 {
public static void main(String[] args) {

    Scanner input = new Scanner(System.in);
    System.out.print("Enter a string:");
    String s = input.nextLine();

    int low = 0;

    int high = s.length() - 1;

    boolean isPalindrome = true;
    while(low < high) {
        if(s.charAt(low) != s.charAt(high)) {
            isPalindrome = false;
            break;
        }

        low++;
        high--;
    }

    if(isPalindrome){
        System.out.println(s + " is a palindrome");
    }else{
        System.out.println(s + " is not a palindrome");
    }
}

}

Answer 1

判断输入字符串是否对称吧.
比如abba 就是true

abbcba就会是false
if(s.charAt(low) != s.charAt(high)) {//s.charAt(low)意思是从第一位开始拿字符, s.charAt(high)意思是拿到最后一位字符
isPalindrome = false;
break;
}