コンストラクタ内でthisを使って他のコンストラクタを呼び出す場合、最初の行でなければなりません。 Joachim SauerJoachim Sauer 308k5959 gold badges565565 silver badges620620 bronze badges seven This is just not working. I get an error saying that a main method is necessary. If i increase the primary system, then I must contact from there. Coding kinds and "finest procedures" may vary widel... https://javfree04680.blogsumer.com/31487692/the-2-minute-rule-for-thisav