宿題手伝いますYO!!

class Ssikaku {
int width;
int height;
Ssikaku(int w, int h) {
width = w;
height = h;
}
public int square() {
return width * height;
}
}
public class Zukei {
public static void main(String[] s) {
Ssikaku Sikaku = new Ssikaku(20, 30);
System.out.println("20×30の四角いｸﾗｽのｲﾝｽﾀﾝｽを生成");
System.out.println("面積 " + Sikaku.square());
}
}