new Thread(() ->{ //asynchronous output test every 2 sec
        while(true) {
            try {
                Thread.sleep(2000);
            } catch (InterruptedException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            System.out.println("test");
        }
    }).start();

String line = scanner.nextLine();

Test
Test
TestI'm try
Testing to type