判断一个数是不是回文数

/*

判断回文数  
thinking revese the number
*/
 import java.util.Scanner;


public  class Test3{ 
	  private static boolean flag = true;
	 private static void judgeNum( int num){
	      int temp ,newNum,oriNum=num ;
	      String str="";
	     while(flag){
	     	// the
	     	  temp= num %10;
	     	  num= num/10;
	     	    str=str+temp+"";
	     	    if (num <1) {
	     	    	flag = false;}
	     	}  
	 	   newNum =  Integer.parseInt(str);
	 	 if(newNum== oriNum)
	  {	 System.out.println("是回文数");
	} else {
		System.out.println( newNum+"不是回文数");
		}
	 	}
	
  public static void main(String args[]){
    Scanner  sc = new Scanner(System.in);
     System.out.println("pls input a number ");
     int num =sc.nextInt();
       judgeNum(num);
     
}
}