Determine whether an integer is a palindrome. Do this without
extra space.
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public class Solution { public boolean isPalindrome(int x) { //負數不是迴文數字 if(x<0){ return false; } //0是迴文數字 else if(x==0){ return true; } //如果x爲正數 else{ int tmpx = x; int newx = 0; //翻轉x while(tmpx>0){ newx = newx*10 + (tmpx%10); tmpx = tmpx/10; } //判斷翻轉後的newx和x是否相同 if(newx==x){ return true; } return false; } }} |