leetcode解题之09#Palindrome Number Java版 两种方法实现

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

public boolean isPalindrome(int x) {
// 负数无回文
if (x < 0)
return false;
int temp = x;
int res = 0;
while (temp != 0) {
res *= 10;
res += temp % 10;
temp /= 10;
}
return x == res;
}

// 利用string
public boolean isPalindrome2(int x) {
String temp = String.valueOf(x);
return new StringBuffer(temp).reverse().toString().equalsIgnoreCase(temp);
}