import java.util.*;public class Main{	public static void main(String args[])	{		Scanner cn = new Scanner(System.in);		System.out.PRint("請輸入一個整數：");	 	int data;	if (cn.hasNextInt())	{	    data = cn.nextInt();	    System.out.println("輸出:");	    System.out.println(data);	} 	else	{	    System.out.println("輸入有問題。。。");	}	}}