请问问题出在哪里呢？需要怎么改？

import java.util.Scanner;
 
public class demo03 {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int a = in.nextInt(); //接收两个整数
        int b = in.nextInt();
        int i = 0;
        //计算出公倍数
        while(true){
            i++;
            if(i%a==0 && i%b==0 && i>=a && i>=b){
                System.out.println("最小公倍数为："+i);
                i=0; //重置i为0
                break;
            }
        }
        //计算公约数
        int yue = 0;
        while(true){
            i++;
            if(a%i==0 && b%i==0){
                yue = i;
            }
            if(i>a || i>b)break;
        }
        System.out.println("最大公约数为："+yue);
    }
}