How to read a line which doesn't end with new line or carriage return character in java?

I am using BufferedReader as follows,

BufferedReader stdin = new BufferedReader(new InputStreamReader(System.in));
for (int i = 0; i < 4; i++) {
   System.out.println(stdin.readLine());
}

And the input given is as follows,

1
2
3

The last input doesn't end with \n or \r, therefore for 3 readLine() will expect input from user unless user presses enter key

Any solution for this using Scanner ?

Actually, I got into this problem while solving , Quora Question Nearby, In their conditions they have mentioned following lines,

Does the last line in the input test case end with a newline? [link]

Nope. No trailing spaces or newlines.

Link for Code, Submitted at above page, test cases are failing

For Test Case Zero, It shows following output , Since, expected output is blank, it means my codes still expects \n or \r which is not provided by input