【重构】小小领悟

重构前的代码，用switch代码块

public enum CustomerType {Common, Quick, VIP;@Overridepublic String toString() {switch (this) {case Common:return "普通";case Quick:return "快速";case VIP:return "VIP";}return "null";};}

重构后，通过覆盖父类方法

public enum CustomerType {Common {@Overridepublic String toString() {return "普通";}},Quick {@Overridepublic String toString() {return "快速";}},VIP {@Overridepublic String toString() {return "VIP";}};}