Java算法——判断一个数是否是回文数

//回文数：是一种数字。如：98789, 这个数字正读是98789,倒读也是98789//正读倒读一样，所以这个数字就是回文数import java.util.Scanner;public class HuiWenShu {public static void main(String[] args) {Scanner sc = new Scanner(System.in);System.out.println("请输入一个整数：");int num = sc.nextInt();String str1 = num + "";// String str1 = Integer.toString(num);// String str1 = String.valueOf(num);StringBuilder str2 = new StringBuilder(str1);str2.reverse();int count = 0;for (int i = 0; i < str1.length(); i++) {if (str1.charAt(i) != str2.charAt(i)) {System.out.println(str1 + "不是回文数");break;} else {count++;}}if (count == str1.length()) {System.out.println(str1 + "是回文数");}}}