java输入不换行，按空格输入下一个数字

public static void main(String[] args) {

int[][] a = new int [2][3];

try {

Scanner s = new Scanner(System.in);

for (int i = 0 ; i < 2; i++) {

System.out.println("请输入：");

String s1 = s.next();

String s2 = s.next();

String s3 = s.next();

a[i][0] = Integer.parseInt(s1);

a[i][1] = Integer.parseInt(s2);

a[i][2] = Integer.parseInt(s3);

}

for (int i = 0 ; i < a.length; i++ ) {

for (int j = 0; j < a[i].length; j++) {

System.out.println("a[" + i + "][" + j + "] = " + a[i][j]);

}

}

} catch (Exception e) {

e.printStackTrace();

}

}