/*
?*?To?change?this?template?choose?Tools?|?Templates
?*?and?open?the?template?in?the?editor.
?*/
package?piano;

import?javax.sound.midi.Instrument;
import?javax.sound.midi.MidiChannel;
import?javax.sound.midi.MidiSystem;
import?javax.sound.midi.MidiUnavailableException;
import?javax.sound.midi.Sequencer;
import?javax.sound.midi.Soundbank;
import?javax.sound.midi.Synthesizer;

/**
?*
?*?@author?mayflower
?*/
public?class?Play?{

????public?Play（）?throws?MidiUnavailableException?{
????????represnets?=?new?int[size];

????????//?打開音樂合成器
????????if?（synthesizer?==?null）?{
????????????if?（（synthesizer?=?MidiSystem.getSynthesizer（））?==?null）?{
????????????????System.out.println（“getSynthesizer（）?failed!“）;
????????????????return;
????????????}
????????}
????????synthesizer.open（）;
????????Sequencer?sequencer?=?MidiSystem.getSequencer（）;
????????Soundbank?sb?=?synthesizer.getDefaultSoundbank（）;
????????if?（sb?!=?null）?{
????????????instruments?=?synthesizer.getDefaultSoundbank（）.getInstruments（）;
????????????synthesizer.loadInstrument（instruments[0]）;
????????}
????????MidiChannel?midiChannels[]?=?synthesizer.getChannels（）;
????????channel?=?midiChannels[0];
????}
????//?當(dāng)鼠標(biāo)點(diǎn)擊時(shí)記錄的音符

????public?boolean?record（int?r）?{
????????if?（number?????????????represnets[number]?=?r;
????????????number++;
????????????return?true;
????????}
????????return?false;
????}
????//?當(dāng)?play?按鈕按下時(shí)

????public?void?play（）?{
????????//?如果不在play
????????for?（int?i?=?0;?i?????????????channel.noteOn（represnets[i]?127）;
????????????pause（650）;
????????????channel.noteOff（represnets[i]?127）;
????????}

????}
????//?清除

????public?void?clear（）?{
????????number?=?0;
????????represnets?=?new?int[size];
????}
//?刪除

????public?void?delete（）?{
????????number--;
????}
????//?play?單個(gè)的音符

????public?void?playSingle（Integer?r）?{
????????record（r）;
????????channel.noteOn（r?127）;
????????pause（650）;
????????channel.noteOff（r?127）;
????}

????synchronized?private?void?pause（int?millis）?{
????????try?{
????????????wait（millis）;
????????}?catch?（InterruptedException?e）?{
????????}
????}
????//?數(shù)據(jù)區(qū)，緩存的音符
????private?final?static?int?size?=?100;
????private?int?number?=?0;
????private?int[]?represnets;
????//?midi?的數(shù)據(jù)???
????private?Synthesizer?synthesizer;
????private?Instrument?instruments[];
????private?MidiChannel?channel;
}