javabook.java

来自「java 完全探索的随书源码」· Java 代码 · 共 18 行

public class JavaBook implements Sellable {
  public String getDescription() {
    return "Java Book";
  };

  public String getUnits() {
    return "Each";
  }

  public double getPricePerUnit() {
    return 39.95;
  }

  public double getWeight() {
    return 4.5;
  }
}