OnJava8-Examples/patterns/trash/Trash.java

// patterns/trash/Trash.java
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
// Base class for Trash recycling examples.
package patterns.trash;

public abstract class Trash {
  public final double weight;
  public Trash(double weight) {
    this.weight = weight;
  }
  public abstract double price();
  @Override public String toString() {
    return String.format(
      "%s weight: %.2f * price: %.2f = %.2f",
      getClass().getSimpleName(),
      weight, price(), weight * price());
  }
  // Ignore for now; to be used later:
  public abstract void accept(Visitor v);
}