小编jsa*_*san的帖子

我有一个任务要求我创建枚举类型.我的问题是,在我初始化它们之后,如何将它们引入默认和参数化构造函数？我试过以下但它不起作用......任何想法？谢谢

package magazine;
import paperPublication.PaperPublication;


public class Magazine extends PaperPublication {

    private enum paperQuality {LOW, NORMAL, HIGH};
    private enum issuingFrequency {WEEKLY, MONTHLY, YEARLY};

    public Magazine() {
        paperQuality = null;   //doesn't work
        issuingFrequency = null;    //doesn't work
    }

    public Magazine (double price, int numberOfPages, enum paperQuality  //doesn't work, enum issuingFrequency  //doesn't work) {

    }
}