coffee.java

来自「java编程思想(第四版)书中原代码 ,对初学者很有用的东西」· Java 代码 · 共 11 行

//: generics/coffee/Coffee.java
package generics.coffee;

public class Coffee {
  private static long counter = 0;
  private final long id = counter++;
  public String toString() {
    return getClass().getSimpleName() + " " + id;
  }
} ///:~