java枚举类型

来源：互联网发布：艾美特暖风机知乎编辑：程序博客网时间：2024/05/18 01:12

java1.5增加了新的引用类型：枚举类型。
特点：
1、枚举类型中的抽象方法必须被它所有常量中的具体方法所覆盖；
2、通过重写toString()方法，将枚举转换成可打印的字符串；
例子：

public enum InvoiceMediumEnum {    pager(1,"纸质"),Electronic(2,"电子");    int status;    String invoiceMediumInfo;    InvoiceMediumEnum(int status, String invoiceMediumInfo) {        this.status = status;        this.invoiceMediumInfo = invoiceMediumInfo;    }    public int getStatus() {        return status;    }    public void setStatus(int status) {        this.status = status;    }    public String getInvoiceMediumInfo() {        return invoiceMediumInfo;    }    public void setInvoiceMediumInfo(String invoiceMediumInfo) {        this.invoiceMediumInfo = invoiceMediumInfo;    }    public static InvoiceMediumEnum getInvoiceMediumEnumByMediumId(int invoiceMedium){        for (InvoiceMediumEnum mediumEnum : values()) {            if(mediumEnum.getStatus()==invoiceMedium){                return mediumEnum;            }        }        throw new RuntimeException(StringUtil.format("invoiceMedium {0} 非法", invoiceMedium));    }}

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