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Java枚舉值能做為switch參數(shù)嗎

小樊
113
2024-07-23 12:43:04
欄目: 編程語言

是的，Java枚舉值可以作為switch語句的參數(shù)。枚舉類型是一種特殊的類，它表示一組固定的常量，可以將枚舉值作為switch語句的參數(shù)，根據(jù)不同的枚舉值執(zhí)行不同的邏輯。以下是一個示例：

public class EnumExample {
    
    public enum Weekday {
        MONDAY, TUESDAY, WEDNESDAY, THURSDAY, FRIDAY, SATURDAY, SUNDAY
    }
    
    public static void main(String[] args) {
        Weekday day = Weekday.MONDAY;
        
        switch (day) {
            case MONDAY:
                System.out.println("Today is Monday");
                break;
            case TUESDAY:
                System.out.println("Today is Tuesday");
                break;
            case WEDNESDAY:
                System.out.println("Today is Wednesday");
                break;
            case THURSDAY:
                System.out.println("Today is Thursday");
                break;
            case FRIDAY:
                System.out.println("Today is Friday");
                break;
            case SATURDAY:
                System.out.println("Today is Saturday");
                break;
            case SUNDAY:
                System.out.println("Today is Sunday");
                break;
            default:
                System.out.println("Invalid day");
        }
    }
}

在上面的示例中，我們定義了一個Weekday枚舉類型，然后使用switch語句根據(jù)不同的枚舉值打印不同的消息。當(dāng)day為Weekday.MONDAY時，輸出為"Today is Monday"。

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