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。 Java Plan to Multiply two Floating-Point Figures The float class is really a wrapper class with the primitive form float which consists of several strategies to proficiently manage a float worth like converting it to a string representation, and vice-versa. If you'd like to use W3Schools exp... https://freethisjav47036.targetblogs.com/32641990/5-simple-statements-about-thisav-explained