Port.Info (Java 2 Platform SE v1.4.1) - JDK 5 Documentation v1.4.1, Java 2 SDK 英文文档

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Java^TM 2 Platform
Std. Ed. v1.4.1

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javax.sound.sampled
Class Port.Info

java.lang.Object
  |
  +--javax.sound.sampled.Line.Info
        |
        +--javax.sound.sampled.Port.Info

Enclosing class:: Port

public static class Port.Info
extends Line.Info

The Port.Info class extends Line.Info with additional information specific to ports, including the port's name and whether it is a source or a target for its mixer. By definition, a port acts as either a source or a target to its mixer, but not both. (Audio input ports are sources; audio output ports are targets.)

To learn what ports are available, you can retrieve port info objects through the getSourceLineInfo and getTargetLineInfo methods of the Mixer interface. Instances of the Port.Info class may also be constructed and used to obtain lines matching the parameters specified in the Port.Info object.

Since:: 1.3

Field Summary

static Port.Info COMPACT_DISC
          A type of port that gets audio from a CD-ROM drive.

static Port.Info HEADPHONE
          A type of port that sends audio to a headphone jack.

static Port.Info LINE_IN
          A type of port that gets audio from a line-level audio input jack.

static Port.Info LINE_OUT
          A type of port that sends audio to a line-level audio output jack.

static Port.Info MICROPHONE
          A type of port that gets audio from a built-in microphone or a microphone jack.

static Port.Info SPEAKER
          A type of port that sends audio to a built-in speaker or a speaker jack.

Constructor Summary

Port.Info(Class lineClass, String name, boolean isSource)
          Constructs a port's info object from the information given.

Method Summary

boolean equals(Object obj)
          Finalizes the equals method

String getName()
          Obtains the name of the port.

int hashCode()
          Finalizes the hashCode method

boolean isSource()
          Indicates whether the port is a source or a target for its mixer.

boolean matches(Line.Info info)
          Indicates whether this info object specified matches this one.

String toString()
          Provides a String representation of the port.

Methods inherited from class javax.sound.sampled.Line.Info

getLineClass

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

MICROPHONE

public static final Port.Info MICROPHONE

A type of port that gets audio from a built-in microphone or a microphone jack.

LINE_IN

public static final Port.Info LINE_IN

A type of port that gets audio from a line-level audio input jack.

COMPACT_DISC

public static final Port.Info COMPACT_DISC

A type of port that gets audio from a CD-ROM drive.

SPEAKER

public static final Port.Info SPEAKER

A type of port that sends audio to a built-in speaker or a speaker jack.

HEADPHONE

public static final Port.Info HEADPHONE

A type of port that sends audio to a headphone jack.

LINE_OUT

public static final Port.Info LINE_OUT

A type of port that sends audio to a line-level audio output jack.

Constructor Detail

Port.Info

public Port.Info(Class lineClass,
                 String name,
                 boolean isSource)

Constructs a port's info object from the information given. This constructor is typically used by an implementation of Java Sound to describe a supported line.
Parameters:: lineClass - the class of the port described by the info object.; name - the string that names the port; isSource - true if the port is a source port (such as a microphone), false if the port is a target port (such as a speaker).

Method Detail

getName

public String getName()

Obtains the name of the port.

Returns:: the string that names the port

isSource

public boolean isSource()

Indicates whether the port is a source or a target for its mixer.

Returns:: true if the port is a source port (such as a microphone), false if the port is a target port (such as a speaker).

matches

public boolean matches(Line.Info info)

Indicates whether this info object specified matches this one. To match, the match requirements of the superclass must be met and the types must be equal.

Overrides:: matches in class Line.Info

Parameters:: info - the info object for which the match is queried
Returns:: true if the specified object matches this one, false otherwise

equals

public final boolean equals(Object obj)

Finalizes the equals method

Overrides:: equals in class Object

Parameters:: obj - the reference object with which to compare.
Returns:: true if this object is the same as the obj argument; false otherwise.
See Also:: Object.hashCode(), Hashtable

hashCode

public final int hashCode()

Finalizes the hashCode method

Overrides:: hashCode in class Object

Returns:: a hash code value for this object.
See Also:: Object.equals(java.lang.Object), Hashtable

toString

public final String toString()

Provides a String representation of the port.

Overrides:: toString in class Line.Info

Returns:: a string that describes the port