java 枚举的实现方法

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java 枚举的简单实现方式，下面这种实现方式特别灵活

/** * Created by Administrator on 2017/1/3. */public enum CgtIdCardTypeEnum {    PRC_ID("PRC_ID", "身份证",0),    PASSPORT("PASSPORT", "护照",1),    COMPATRIOTS_CARD("COMPATRIOTS_CARD", "港澳台通行证",2),    PERMANENT_RESIDENCE("PERMANENT_RESIDENCE", "外国人永久居留证",3);    private String enName;    private String zhName;    private int index;    private CgtIdCardTypeEnum(String enName, String zhName, int index) {        this.enName = enName;        this.zhName = zhName;        this.index  = index;    }    //是否包含枚举项    public static boolean contains(String name){        //所有的枚举值        CgtIdCardTypeEnum[] idCardTypes = values();        //遍历查找        for(CgtIdCardTypeEnum s : idCardTypes){            if(s.name().equals(name)){                return true;            }        }        return false;    }    //获得认证类型    public static CgtIdCardTypeEnum getIdCardTypeEnumByIndex(int index){        //所有的枚举值        CgtIdCardTypeEnum[] cgtIdCardTypeEnums = values();        //遍历查找        for(CgtIdCardTypeEnum s : cgtIdCardTypeEnums){            if(s.getIndex() == (index)){                return s;            }        }        return null;    }    @Override    public String toString() {        return zhName;    }    public String getEnName() {        return enName;    }    public void setEnName(String enName) {        this.enName = enName;    }    public String getZhName() {        return zhName;    }    public void setZhName(String zhName) {        this.zhName = zhName;    }    public int getIndex() {        return index;    }    public void setIndex(int index) {        this.index = index;    }}

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