public class Cubic extends Rectangle {
protected int z;
protected int length;
public Cubic() {
super();
}
public Cubic(int x, int y, int z,
int length, int width, int height) {
super(x, y, width, height);
this.z = z;
this.length = length;
}
public void setZ(int z) { this.z = z; }
public void setLength(int length) { this.length = length; }
public int getZ() { return z; }
public int getLength() { return length; }
public int getVolumn() {
// 可以直接使用父類別中的width、height成員
return length*width*height;
}
}