设计一个立方体类Cube,只有边长（side）属性,具有设置边长(setSide)、取得边长(getSide)、计算表面
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public class Cube {
private double side;
public Cube() {
System.out.println("Cube() constructor called!");
}
public void setSide(double s) {
side = s;
System.out.println("side= " + side);
}
public void show() {
System.out.println("area= " + 6 * side * side);
System.out.println("volume= " + side * side * side);
}
public static void main(String[] args) {
Cube cube = new Cube();
cube.setSide(3.0);// 设计边长
cube.show();// 显示表面积和面积
}
}
Console:
Cube() constructor called!
side= 3.0
area= 54.0
volume= 27.0
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