Java：Out with the Old，In with the New [英] Java: Out with the Old, In with the New

问题描述

Java即将推出版本7.在我看来，必须有大量的教科书和培训手册，这些教科书和培训手册都是基于Java的旧版本教授方法，其中教授的方法现在有更好的解决方案。

Java is nearing version 7. It occurs to me that there must be plenty of textbooks and training manuals kicking around that teach methods based on older versions of Java, where the methods taught, would have far better solutions now.

有哪些样板代码情况，特别是那些你看到人们通过习惯实现的情况，你发现自己重构利用最新版本的Java？

What are some boilerplate code situations, especially ones that you see people implement through force of habit, that you find yourself refactoring to utilize the latest versions of Java?

推荐答案

枚举。替换

public static final int CLUBS = 0;
public static final int DIAMONDS = 1;
public static final int HEARTS = 2;
public static final int SPADES = 3;

with

public enum Suit { 
  CLUBS, 
  DIAMONDS, 
  HEARTS, 
  SPADES 
}

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