判斷一個枚舉值是否屬於某個枚舉類

 1：自定義枚舉類

/**
 * @Description: 控制開關的狀態
 * @since: JDK 1.7
 * @Version：  V1.0
 */
public enum SwitchStatus {
    CLOSE(0, "0-關閉"),
    OPEN(1, "1-開啟");

    private int key;
    private String value;

    private SwitchStatus(int key, String value) {
        this.key = key;
        this.value = value;
    }

    public int getKey() {
        return key;
    }

    public String getValue() {
        return value;
    }
}

 2：工具類方法——本例的核心

public class EnumUtil {
    /**
     * 判斷數值是否屬於枚舉類的值
     * @param key
     * @return
     */
    public static boolean isInclude(int key){
        boolean include = false;
        for (SwitchStatus e: SwitchStatus.values()){
            if(e.getKey()==key){
                include = true;
                break;
            }
        }
        return include;
    }
}

 3：測試

public class TestMain {
    public static void main(String[]args){
        System.out.println(EnumUtil.isInclude(0));
        System.out.println(EnumUtil.isInclude(1));
        System.out.println(EnumUtil.isInclude(2));
    }
}