java 判断数字是否为回文数字

Posted 2021-05-07

public static boolean digitPalindrome(int num){
	    if(num<0) return false;
	    int ws = 0;
	    int num_ = num;
	    while(num_!=0){
	        ws++;
	        num_/=10;
	    }
	    System.out.println(ws);
	    num_=num;
	    int k = ws/2;
	    while(ws!=1){
	    	System.out.println(num_);
	        int right = num_%10;
	        int left = (int) (num_/Math.pow(10,ws-1));
	        if(right!=left) return false;
	        num_=num_/10;
	        num_=(int) (num_%Math.pow(10,ws-2));
	        ws-=2;
	    }
	    return true;
	}