What are the methods that come with Java enumeration classes?-javaTutorial-php.cn

What are the methods that come with Java enumeration classes?

王林

Release： 2023-04-24 21:55:06

forward

1304 people have browsed it

1. valueOf() method

This is a static method that passes in a string (the name of the enumeration) to get the enumeration class. If the name passed in does not exist, an error will be reported.

public static void main(String[] args) throws Exception{
    System.out.println(PayTypeEnum.valueOf("ALI_PAY"));
    System.out.println(PayTypeEnum.valueOf("HUAWEI_PAY"));
}

Copy after login

2. values() method

Returns an array containing all enumeration data in the enumeration class.

public static void main(String[] args) throws Exception {
    PayTypeEnum[] payTypeEnums = PayTypeEnum.values();
    for (PayTypeEnum payTypeEnum : payTypeEnums) {
        System.out.println("code: " + payTypeEnum.getCode() + ",describe: " + payTypeEnum.getDescribe());
    }
}

Copy after login

3. ordinal() method

By default, the enumeration class will provide a default order for the defined enumeration, and the ordinal() method can Returns the order of the enumeration.

public static void main(String[] args) throws Exception {
    PayTypeEnum[] payTypeEnums = PayTypeEnum.values();
    for (PayTypeEnum payTypeEnum : payTypeEnums) {
        System.out.println("ordinal: " + payTypeEnum.ordinal() + ", Enum: " + payTypeEnum);
    }
}
/**
ordinal: 0, Enum: ALI_PAY
ordinal: 1, Enum: WECHAT_PAY
ordinal: 2, Enum: UNION_PAY
*/

Copy after login

The above is the detailed content of What are the methods that come with Java enumeration classes?. For more information, please follow other related articles on the PHP Chinese website!