程序包 ohos.data.usage

枚举 MountState

java.lang.Object

java.lang.Enum<MountState>

ohos.data.usage.MountState

所有已实现的接口:

Serializable, Comparable<MountState>

public enum MountState
extends Enum<MountState>

Indicates the mount state of a device.

从以下版本开始:

1

枚举常量概要

枚举常量

枚举常量	说明
DISK_MOUNTED	Indicates that the device is mounted.
DISK_REMOVED	Indicates that the device has been removed.
DISK_UNKNOWN	Indicates that the device is in an unknown state.
DISK_UNMOUNTED	Indicates that the device is unmounted.

方法概要

限定符和类型	方法	说明
static MountState	valueOf(String name)	返回带有指定名称的该类型的枚举常量。 字符串必须与用于声明该类型的枚举常量的 标识符完全匹配。(不允许有多余 的空格字符。)
static MountState[]	values()	按照声明该枚举类型的常量的顺序, 返回 包含这些常量的数组。该方法可用于迭代 常量, 如下所示: for (MountState c : MountState.values()) System.out.println(c);

从类继承的方法 java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

从类继承的方法 java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

枚举常量详细资料

DISK_MOUNTED

public static final MountState DISK_MOUNTED

Indicates that the device is mounted.

DISK_UNMOUNTED

public static final MountState DISK_UNMOUNTED

Indicates that the device is unmounted.

DISK_REMOVED

public static final MountState DISK_REMOVED

Indicates that the device has been removed.

DISK_UNKNOWN

public static final MountState DISK_UNKNOWN

Indicates that the device is in an unknown state. The device may not exist, or an IPC error occurs.

方法详细资料

values

public static MountState[] values()

按照声明该枚举类型的常量的顺序, 返回 包含这些常量的数组。该方法可用于迭代 常量, 如下所示:

for (MountState c : MountState.values())
    System.out.println(c);

返回:

按照声明该枚举类型的常量的顺序返回的包含这些常量的数组

valueOf

public static MountState valueOf(String name)

返回带有指定名称的该类型的枚举常量。 字符串必须与用于声明该类型的枚举常量的 标识符完全匹配。(不允许有多余 的空格字符。)

参数:

name - 要返回的枚举常量的名称。

返回:

返回带有指定名称的枚举常量

抛出:

IllegalArgumentException - 如果该枚举类型没有带有指定名称的常量

NullPointerException - 如果参数为空值