是則拋出Exception異常？

剛寫的希望能幫到你

import Java.util.Scanner;

public class chenkun {

public static void main(String[] args) {

Scanner shuru = new Scanner(System.in);

System.out.println("請輸入一個整數");

int a = shuru.nextInt();

if(a>0){

System.out.print(a + "開平方的值是：" + a/2 );

}else{

System.out.print("Exception異常");

}

}

}