java中枚举的详细使用介绍

public enum Week {    MON{        public String toLocaleString(){            return "星期一";        }    },TUES{        public String toLocaleString(){            return "星期二";        }    },WEB{        public String toLocaleString(){            return "星期三";        }    },THUR{        public String toLocaleString(){            return "星期四";        }    },FRI{        public String toLocaleString(){            return "星期五";        }    },SAT{        public String toLocaleString(){            return "星期六";        }    },SUN{        public String toLocaleString(){            return "星期日";        }    };    public abstract String toLocaleString();}

public class EnumTest {    public static void main(String[] args){        for(Week w:Week.values()){            System.out.println(w);        }    }}

public class EnumTest {    public static void main(String[] args){        Week day =Week.FRI;        System.out.println(day);//FRI        System.out.println(day.name());//FRI        System.out.println(day.ordinal());//4        System.out.println(Week.valueOf("SUN").toLocaleString());//星期日        System.out.println(Week.values().length);//7  获取枚举长度    }}

public enum Gender {    MALE("男"),FEMALE("女");    private String name;    private Gender(String name){        this.name =name;    }    public String getName(){        return this.name;    }    public String toString(){        String name = null;        switch(this){        case MALE:            name="男";            break;        case FEMALE:            name="女";            break;        }        return name;    }}

public enum Lamp {     /*每个枚举元素各表示一个方向的控制灯*/         S2N("N2S","S2W",false),S2W("N2E","E2W",false),E2W("W2E","E2S",false),E2S("W2N","S2N",false),     /*下面元素表示与上面的元素的相反方向的灯，它们的“相反方向灯”和“下一个灯”应忽略不计！*/     N2S(null,null,false),N2E(null,null,false),W2E(null,null,false),W2N(null,null,false),     /*由南向东和由西向北等右拐弯的灯不受红绿灯的控制，所以，可以假想它们总是绿灯*/     S2E(null,null,true),E2N(null,null,true),N2W(null,null,true),W2S(null,null,true);     private Lamp(String opposite,String next,boolean lighted){         this.opposite = opposite;         this.next = next;         this.lighted = lighted;     }      /*当前灯是否为绿*/         private boolean lighted;     /*与当前灯同时为绿的对应方向*/         private String opposite;     /*当前灯变红时下一个变绿的灯*/         private String next;     public boolean isLighted(){         return lighted;     }     /**      * 某个灯变绿时，它对应方向的灯也要变绿      */         public void light(){         this.lighted = true;         if(opposite != null){             Lamp.valueOf(opposite).light();         }         System.out.println(name() + " lamp is green，下面总共应该有6个方向能看到汽车穿过！");     }     /**      * 某个灯变红时，对应方向的灯也要变红，并且下一个方向的灯要变绿      * @return 下一个要变绿的灯      */         public Lamp blackOut(){         this.lighted = false;         if(opposite != null){             Lamp.valueOf(opposite).blackOut();         }                 Lamp nextLamp= null;         if(next != null){             nextLamp = Lamp.valueOf(next);             System.out.println("绿灯从" + name() + "-------->切换为" + next);                         nextLamp.light();         }         return nextLamp;     } }