Цикл Do-While исполняется лишний раз

class Main {
    public static void main(String args[])
            throws java.io.IOException {
        char ch;
        do {
            System.out.println("Press any key, then ENTER:  ");
            ch = (char) System.in.read();
        }
        while (ch != 'q');
    }
}

Press any key, then ENTER:
h
Press any key, then ENTER:
Press any key, then ENTER:
Press any key, then ENTER:
k
Press any key, then ENTER:
Press any key, then ENTER:
Press any key, then ENTER:
t
Press any key, then ENTER:
Press any key, then ENTER:
Press any key, then ENTER:

jj
Press any key, then ENTER:
Press any key, then ENTER:
Press any key, then ENTER:
Press any key, then ENTER:

class Main {
    public static void main(String args[])
            throws java.io.IOException {
        char ch, ignore;
        do {
            System.out.println("Press any key, then ENTER:  ");
            ch = (char) System.in.read();
            do {
                ignore = (char) System.in.read();
               }
            while (ignore !='\n');
        }
        while (ch != 'q');
    }
}

class Main {
    public static void main(String args[])
            throws java.io.IOException {
        char ch, ignore;
        do {
            System.out.println("Press any key, then ENTER:  ");
            ch = (char) System.in.read();
            System.out.println("Ch = " + ch);
            do {
                ignore = (char) System.in.read();
                System.out.printf("ch(hex) = 0x%02x \n", (byte)ignore);
               }
            while (ignore !='\n');
        }
        while (ch != 'q');
    }
}

final var scanner = new Scanner(System.in);
do {
  System.out.println("Press any key, then ENTER:");
} while (!"q".equalsIgnoreCase(scanner.nextLine()));

final var br = new BufferedReader(new InputStreamReader(System.in));
do {
  System.out.println("Press any key, then ENTER:");
} while (!"q".equalsIgnoreCase(br.readLine()));

    /**
     * Reads the next byte of data from the input stream. The value byte is
     * returned as an <code>int</code> in the range <code>0</code> to
     * <code>255</code>. If no byte is available because the end of the stream
     * has been reached, the value <code>-1</code> is returned. This method
     * blocks until input data is available, the end of the stream is detected,
     * or an exception is thrown.
     *
     * <p> A subclass must provide an implementation of this method.
     *
     * @return     the next byte of data, or <code>-1</code> if the end of the
     *             stream is reached.
     * @exception  IOException  if an I/O error occurs.
     */
    public abstract int read() throws IOException;

int i;
do {
    i = System.in.read();
    System.out.println(i);
} while (i >= 0);