surface.java

来自「Java the UML Way 书中所有源码」· Java 代码 · 共 49 行

/*
 * Surface.java   E.L. 2001-08-15
 *
 */
class Surface {
  private String name;  // for identification purposes
  private double length;
  private double width;
  private Material material;

  /*
   * Material is not an argument to the constructor. It should be allowed to create
   * Surface objects without at the same time decide which material is prefered.
   * Material may be set by the method setmaterial().
   */
  public Surface(String initName, double initLength, double initWidth) {
    name = initName;
    length = initLength;
    width = initWidth;
  }

  public String getName() {
    return name;
  }

  public double getLength() {
    return length;
  }

  public double getWidth() {
    return width;
  }

  public Material getMaterial() {  // returns null if material is not registered
    return material;
  }

  public void setMaterial(Material newMaterial) {
    material = newMaterial;
  }

  public double getArea() {
    return width * length;
  }

  public double getCircumference() {
    return 2 * (length + width);
  }
}