Line.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 Line.Info

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

Direct Known Subclasses:: DataLine.Info, Port.Info

Enclosing class:: Line

public static class Line.Info
extends Object

A Line.Info object contains information about a line. The only information provided by Line.Info itself is the Java class of the line. A subclass of Line.Info adds other kinds of information about the line. This additional information depends on which Line subinterface is implemented by the kind of line that the Line.Info subclass describes.

A Line.Info can be retrieved using various methods of the Line, Mixer, and AudioSystem interfaces. Other such methods let you pass a Line.Info as an argument, to learn whether lines matching the specified configuration are available and to obtain them.

Since:: 1.3
See Also:: Line.getLineInfo(), Mixer.getSourceLineInfo(), Mixer.getTargetLineInfo(), Mixer.getLine(Line.Info), Mixer.getSourceLineInfo(Line.Info), Mixer.getTargetLineInfo(Line.Info), Mixer.isLineSupported(Line.Info), AudioSystem.getLine(Line.Info), AudioSystem.getSourceLineInfo(Line.Info), AudioSystem.getTargetLineInfo(Line.Info), AudioSystem.isLineSupported(Line.Info)

Constructor Summary

Line.Info(Class lineClass)
          Constructs an info object that describes a line of the specified class.

Method Summary

Class getLineClass()
          Obtains the class of the line that this Line.Info object describes.

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

String toString()
          Obtains a textual description of the line info.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

Line.Info

public Line.Info(Class lineClass)

Constructs an info object that describes a line of the specified class. This constructor is typically used by an application to describe a desired line.
Parameters:: lineClass - the class of the line that the new Line.Info object describes

Method Detail

getLineClass

public Class getLineClass()

Obtains the class of the line that this Line.Info object describes.

Returns:: the described line's class

matches

public boolean matches(Line.Info info)

Indicates whether the specified info object matches this one. To match, the specified object must be identical to or a special case of this one. The specified info object must be either an instance of the same class as this one, or an instance of a sub-type of this one. In addition, the attributes of the specified object must be compatible with the capabilities of this one. Specifically, the routing configuration for the specified info object must be compatible with that of this one. Subclasses may add other criteria to determine whether the two objects match.

Parameters:: info - the info object which is being compared to this one
Returns:: true if the specified object matches this one, false otherwise

toString

public String toString()

Obtains a textual description of the line info.

Overrides:: toString in class Object

Returns:: a string description