解法1
if(x==0) return x; StringBuilder res=new StringBuilder(); if(x<0){ res.append(‘-‘); x = Math.abs(x); } while (x>0){ int a = x%10; res.append(a); x/=10; } try{ return Integer.parseInt(res.toString()); }catch (Exception e){ return 0; }
解法2
public static int reverse2(int x) { int res = 0; while (x != 0) { int tmp = x % 10; int resTmp = res*10+tmp; if((resTmp-tmp)/10!=res) return 0; res = res * 10 + tmp; x /= 10; } return res; }
这两种方法执行效率都是2ms
原文地址:https://www.cnblogs.com/superxuezhazha/p/12584341.html
时间: 2024-11-06 09:34:25