9. Palindrome Number

Determine whether an integer is a palindrome. Do this without extra space.

负数不算回文串;

将此整数求逆可能会发生溢出,当不属于回文串的情况下;

只用转换一般进行比较即可;

 public boolean isPalindrome(int x) {
        if(x<0||(x%10==0&&x!=0))
            return false;
        boolean result=false;
        int x1=0;
        while(x1<x){
            x1=x1*10+x%10;
            x/=10;
        }
        if(x==x1||x1/10==x)
            result=true;
        
        
        return result;
    }