/**
 * Write a program to check whether a given number is an ugly number.
 * Ugly numbers are positive numbers whose prime factors only include 2, 3, 5. For example, 6, 8 are ugly while 14 is not ugly since it includes another prime factor 7.
 * Note that 1 is typically treated as an ugly number.
 **/
 
public class Solution {
  public boolean isUgly(int num) {
    if(num <= 0)    return false;
    while(num%2==0) num/=2;
    while(num%3==0) num/=3;
    while(num%5==0) num/=5;
    return num == 1;
  }
}

Create 263.java