Patch (Java Platform SE 6) - JDK 5 Documentation v6.0, Java 2 SDK 英文文档

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Java™ Platform
Standard Ed. 6

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javax.sound.midi
Class Patch

java.lang.Object
  javax.sound.midi.Patch

public class Patch
extends Object
extends Object

A Patch object represents a location, on a MIDI synthesizer, into which a single instrument is stored (loaded). Every Instrument object has its own Patch object that specifies the memory location into which that instrument should be loaded. The location is specified abstractly by a bank index and a program number (not by any scheme that directly refers to a specific address or offset in RAM). This is a hierarchical indexing scheme: MIDI provides for up to 16384 banks, each of which contains up to 128 program locations. For example, a minimal sort of synthesizer might have only one bank of instruments, and only 32 instruments (programs) in that bank.

To select what instrument should play the notes on a particular MIDI channel, two kinds of MIDI message are used that specify a patch location: a bank-select command, and a program-change channel command. The Java Sound equivalent is the programChange(int, int) method of MidiChannel.

See Also:: Instrument, Instrument.getPatch(), MidiChannel.programChange(int, int), Synthesizer.loadInstruments(Soundbank, Patch[]), Soundbank, Sequence.getPatchList()

Constructor Summary

Patch(int bank, int program)
          Constructs a new patch object from the specified bank and program numbers.

Method Summary

int getBank()
          Returns the number of the bank that contains the instrument whose location this Patch specifies.

int getProgram()
          Returns the index, within a bank, of the instrument whose location this Patch specifies.

Methods inherited from class java.lang.Object

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

Constructor Summary
`Patch(int bank, int program)` Constructs a new patch object from the specified bank and program numbers.

Method Summary
`int`	`getBank()` Returns the number of the bank that contains the instrument whose location this `Patch` specifies.
`int`	`getProgram()` Returns the index, within a bank, of the instrument whose location this `Patch` specifies.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

Patch

public Patch(int bank,
             int program)

Constructs a new patch object from the specified bank and program numbers.

Parameters:: bank - the bank index (in the range from 0 to 16383); program - the program index (in the range from 0 to 127)

Method Detail

getBank

public int getBank()

Returns the number of the bank that contains the instrument whose location this Patch specifies.

Returns:: the bank number, whose range is from 0 to 16383
See Also:: MidiChannel.programChange(int, int)

getProgram

public int getProgram()

Returns the index, within a bank, of the instrument whose location this Patch specifies.

Returns:: the instrument's program number, whose range is from 0 to 127
See Also:: MidiChannel.getProgram(), MidiChannel.programChange(int), MidiChannel.programChange(int, int)