import java.io.*;
public class TestNum {
    public static boolean prime(int n) throws ArgumentOutOfBoundException{
        if (n < 0)
            throw new ArgumentOutOfBoundException();／／n小于０抛出异常
        if (n == 0){
            return false;
        }
        
        int m =(int)Math.sqrt(n);
        for(int i = 2;i <= m;i++){
            if (n % i == 0){
                return false;
            }
        }
        return true;
    }
    
    public static void main(String[] args) {
        try {
            boolean flag = false;
            flag = prime(-4);
            System.out.println(flag);
        } catch (ArgumentOutOfBoundException e) {／／抛出异常后捕获，然后打印＂参数不能小于零＂
            System.out.println("参数不能小于零！");
        }
    }
}
class ArgumentOutOfBoundException extends Exception {//定义自己的异常类
    
    public ArgumentOutOfBoundException(){}
    
}