打印出可被其他数字整除的数字的Java程序

Question

我有一个程序读取两个实数，然后打印出这两个之间的所有数字，可以被2或3或5整除。程序工作正常，但当用户输入两个非常大的数字时（例如，1122222123333）和214123324434434）该程序需要很长时间来计算结果。我想以某种方式修复程序，以便即使对于大数字，结果也会立即打印出来。

这是我目前的代码：

import java.util.Scanner;
public class Numbers 
{
    public static void main(String[] args) 
    {
        Scanner sc = new Scanner(System.in);        
        long x = sc.nextLong();   // first number input 
        long y = sc.nextLong();   // second number input            
        long num = 0;            // new variable num -- means all the numbers between these to given input numbers
        long count = 0;            // loop counter - how many numbers are divided by 2 or 3 or 5                        
        for (num = x; x <= num && num <= y; num++) {                                                    
            if (num % 2 == 0 | num % 3 == 0 | num % 5 == 0) {
                count = count + 1;             // increasing the counter by 1, so that every time the loop repeats, the counter increases...                                
            }               
        }
        System.out.println(count);  // prints out how many numbers are divided by 2 or 3 or 5 ...       
    }
}

Answer 1

另一答案