Java基础-枚举的两种基本模式

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1.C语言模式

int enum模式

public class SeasonInt{

public static final int SPRING = 0;

public static final int SUMMER = 1;

public static final int AUTUMN = 2;

public static final int WINTER = 3;

}

2.JAVA模式

typesafe enum模式

//为枚举创建一个类

public class SeasonSafe{

private final String name;

private SeasonSafe(String name){

this.name = name;

}

Public String toString(){

return name;

}

//用公用的该类的对象来表达每一个枚举的值

public static final

SeasonSafe SPRING = new SeasonSafe(“spring”);

public static final

SeasonSafe SUMMER = new SeasonSafe(“summer”);

public static final

SeasonSafe AUTUMN = new SeasonSafe(“autumn”);

public static final

SeasonSafe WINTER = new SeasonSafe(“winter”);

}

typesafe enum模式的优点：

1. 私有的构造方法阻止了对该类的继承和显式实例化，仅可以取得定义好的几种类别。