java枚举

public enum Zoo {
    Tigger("老虎"), Monkey("猴"), Dog("狗"), Pig("猪"), Null;//Null调用无参构造器，其他调用有参构造器
    private String chineseName;
    private Zoo(){}
    private Zoo(String chineseName){
        this.chineseName = chineseName;
    }
    public String getChineseName(){
        return chineseName;
    }
}

    public static void main(String[] args) {
        for (Zoo string : Zoo.values()) {
            System.out.println(string + ":" + string.getChineseName());
        }
        System.out.println(Zoo.Dog+"-"+Zoo.Dog.getChineseName());
        System.out.println(Zoo.Null+"-"+Zoo.Null.getChineseName());
    }