1：方法1

public static void main(String[] args){
		System.out.print(請輸入a和n");
		Scanner scan = new Scanner(System.in);//以空格作為分隔符
		int a = scan.nextInt();
		int n = scan.nextInt();
		scan.close();//關閉掃描器
	} 

2：方法2

public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		
		String[] str = scan.nextLine().split(" "); //字串以空格分割
		scan.close();
		
		int[] num = new int[str.length];
		
		for(int i=0;i<str.length;i++)
			num[i] = Integer.parseInt(String.valueOf(str[i]));//將字串的數字儲存到整型數組裡
		
	}