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大家好,我是美有Hugh,卡哇伊孩子的打字之道:

是不是买了台电钢放在宿舍的桌上发现位置不够放键盘了呢?

IMG_20211023_091103-scaled

ne,何不把电钢琴变成你的键盘呢?

参考代码

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package Huuuuugh;
import javax.sound.midi.*;
import javax.swing.*;
import java.applet.Applet;
import java.applet.AudioClip;
import java.awt.*;
import java.awt.event.*;
import java.util.HashMap;
import java.util.List;
import java.io.*;
import java.util.PropertyResourceBundle;

public class MidiHandler
{
static String settings;
static File[] files = new File[88];
static AudioClip[] sound = new AudioClip[88];
static AudioClip chosenClip;
static boolean isFileExi;
static boolean isSetting;
static boolean hasKey=false;
static int key;
static Frame frame = new Frame();
static JLabel label = new JLabel();
static JLabel label2 = new JLabel();
static HashMap<Integer,Integer> keyS=new HashMap<>();
public static void main(String[] args) throws IOException {
File pro = new File(System.getProperty("user.dir")+"\\config.properties");
if(!pro.exists()) {
pro.createNewFile();
FileWriter fr = new FileWriter(System.getProperty("user.dir")+"\\config.properties");
fr.write("setting=true\n\n");
fr.flush();
fr.close();
}
InputStream in = new FileInputStream(pro);
PropertyResourceBundle res = new PropertyResourceBundle(in);
for (Object o : res.keySet().toArray()) {
if(!((String) o).equals("setting")){
keyS.put(Integer.parseInt((String) o),Integer.parseInt(res.getString((String) o)));//读取配置
}
}
System.out.println(keyS.toString());
frame.setLayout(new BorderLayout());
frame.setBounds(10,10,750,130);
frame.setTitle("请稍后,正在加载midi键盘...");
frame.add("North",label);
label.setFont(new Font(null, Font.BOLD,20));
label.setText("请稍后,正在加载midi键盘...");
label2.setFont(new Font(null, Font.BOLD,20));
label2.setText("");
frame.add("South",label2);
frame.setVisible(true);
if (res.getString("setting").equals("true")){
System.out.println("配置模式");
isSetting=true;

frame.addWindowFocusListener(new WindowFocusListener() {
@Override
public void windowGainedFocus(WindowEvent e) {

}

@Override
public void windowLostFocus(WindowEvent e) {
hasKey=false;
}
});
frame.addKeyListener(new KeyListener() {
@Override
public void keyTyped(KeyEvent e) {

}

@Override
public void keyPressed(KeyEvent e) {
hasKey=true;
label.setText("键盘上的按键"+e.getKeyCode());
key=e.getKeyCode();
}

@Override
public void keyReleased(KeyEvent e) {
hasKey=false;
label2.setText("");
}
});
}
for (int i = 0; i < files.length; i++) {
files[i] = new File(System.getProperty("user.dir") + "/piano_music/1 ("+(i+1)+").wav");
try {
sound[i] = Applet.newAudioClip(files[i].toURL());
isFileExi=true;
} catch(Exception e1){
isFileExi=false;
}

}

int a = 65;
char b = (char)a;
System.out.println(b);
int i = 1;
switch (i){
case 1:
System.out.println(1);
break;
case 2:
System.out.println(2);
break;
default:
System.out.println("d");
}
new MidiHandler();
}

public MidiHandler()
{
MidiDevice device;
MidiDevice.Info[] infos = MidiSystem.getMidiDeviceInfo();
for (int i = 0; i < infos.length; i++) {
try {
device = MidiSystem.getMidiDevice(infos[i]);
//does the device have any transmitters?
//if it does, add it to the device list
System.out.println(infos[i]);

//get all transmitters
List<Transmitter> transmitters = device.getTransmitters();
//and for each transmitter

for(int j = 0; j<transmitters.size();j++) {
//create a new receiver
transmitters.get(j).setReceiver(
//using my own MidiInputReceiver
new MidiInputReceiver(device.getDeviceInfo().toString())
);
}

Transmitter trans = device.getTransmitter();
trans.setReceiver(new MidiInputReceiver(device.getDeviceInfo().toString()));

//open each device
device.open();
//if code gets this far without throwing an exception
//print a success message
System.out.println(device.getDeviceInfo()+" Was Opened");
frame.setTitle("设置模式");
label.setText("midi键盘加载成功");
if(!isSetting){
frame.setVisible(false);
}
} catch (MidiUnavailableException e) {}
}


}

/*
* abacdefghijklmnopqrstuvwxyzvwxyzonmabcdefghijklmnohov xyzahovzahovzahoobilibilibilibilibiliaceacehjlo
* */
//tried to write my own class. I thought the send method handles an MidiEvents sent to it
public class MidiInputReceiver implements Receiver{
public int a = 1;
public String name;
public void updateData(int data){
if(hasKey){
keyS.put(data,key);
System.out.println(data+"="+key);
label2.setText("对应midi键盘上的"+data);
}
}
public void bindKey(byte b){
System.out.println("case " + b + ":");
System.out.println(" r.keyPress(" + "KeyEvent.VK_NUMPAD" + a + ");");
System.out.println(" break;");
a++;
}
public MidiInputReceiver(String name) {
this.name = name;
}//-112按下
//-128松开
public void send(MidiMessage msg, long timeStamp) {
//System.out.println("msg " + msg.getMessage()[1]);
for (byte a:msg.getMessage()){
//System.out.println(a);
}
if(isSetting){
try {
FileWriter fr = new FileWriter(System.getProperty("user.dir")+"\\config.properties");
fr.write("setting=true\n\n");
for (Integer key : keyS.keySet()) {
fr.write(key+"="+keyS.get(key)+"\n");
}
fr.flush();
fr.close();
} catch (IOException e) {
e.printStackTrace();
}

}
byte[] message = msg.getMessage();
try {
Robot r = new Robot();
if(message[0] == -112){//按下
//System.out.println(message[1]);
Piano piano = new Piano(Integer.parseInt(message[1]+"")-9);
piano.start();

//bindKey(message[1]);

updateData(message[1]);

//System.out.println("press");
if(isSetting){
return;
}
try {
r.keyPress(keyS.get((int) message[1]));
}catch(Exception e){

}
}
if(message[0] == -128){//松开
//System.out.println("release");
if(isSetting){
return;
}
try {
r.keyRelease(keyS.get((int) message[1]));
}catch (Exception e){
}
}
} catch (AWTException e) {
e.printStackTrace();
}

}
public void close() {}


}
}
class Piano extends Thread{
int aaa;
Piano(int qwq){
aaa = qwq;
}
@Override
public void run(){
if(MidiHandler.isFileExi) {
play(aaa);
}
}
public void play(int i){
stop(i);
MidiHandler.chosenClip = MidiHandler.sound[i];
MidiHandler.chosenClip.play();
}
public void stop(int i){
MidiHandler.chosenClip = MidiHandler.sound[i];
MidiHandler.chosenClip.stop();
}
}

下面这个是所有按键的代码都写死的老版本程序

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package Huuuuugh;
import javax.sound.midi.*;
import java.applet.Applet;
import java.applet.AudioClip;
import java.awt.*;
import java.awt.event.KeyEvent;
import java.util.List;
import java.io.*;
public class MidiHandler
{
static File[] files = new File[88];
static AudioClip[] sound = new AudioClip[88];
static AudioClip chosenClip;
public static void main(String[] args) {
for (int i = 0; i < files.length; i++) {
files[i] = new File(System.getProperty("user.dir") + "/piano_music/1 ("+(i+1)+").wav");
try {
sound[i] = Applet.newAudioClip(files[i].toURL());
} catch(OutOfMemoryError e1){
e1.printStackTrace();
} catch(Exception e1){
e1.printStackTrace();
}
}

int a = 65;
char b = (char)a;
System.out.println(b);
int i = 1;
switch (i){
case 1:
System.out.println(1);
break;
case 2:
System.out.println(2);
break;
default:
System.out.println("d");
}
new MidiHandler();
}

public MidiHandler()
{
MidiDevice device;
MidiDevice.Info[] infos = MidiSystem.getMidiDeviceInfo();
for (int i = 0; i < infos.length; i++) {
try {
device = MidiSystem.getMidiDevice(infos[i]);
//does the device have any transmitters?
//if it does, add it to the device list
System.out.println(infos[i]);

//get all transmitters
List<Transmitter> transmitters = device.getTransmitters();
//and for each transmitter

for(int j = 0; j<transmitters.size();j++) {
//create a new receiver
transmitters.get(j).setReceiver(
//using my own MidiInputReceiver
new MidiInputReceiver(device.getDeviceInfo().toString())
);
}

Transmitter trans = device.getTransmitter();
trans.setReceiver(new MidiInputReceiver(device.getDeviceInfo().toString()));

//open each device
device.open();
//if code gets this far without throwing an exception
//print a success message
System.out.println(device.getDeviceInfo()+" Was Opened");


} catch (MidiUnavailableException e) {}
}


}

/*
* abacdefghijklmnopqrstuvwxyzvwxyzonmabcdefghijklmnohov xyzahovzahovzahoobilibilibilibilibiliaceacehjlo
* */
//tried to write my own class. I thought the send method handles an MidiEvents sent to it
public class MidiInputReceiver implements Receiver{
public int a = 1;
public String name;
public void bindKey(byte b){
System.out.println("case " + b + ":");
System.out.println(" r.keyPress(" + "KeyEvent.VK_NUMPAD" + a + ");");
System.out.println(" break;");
a++;
}
public MidiInputReceiver(String name) {
this.name = name;
}//-112按下
//-128松开
public void send(MidiMessage msg, long timeStamp) {
//System.out.println("msg " + msg.getMessage()[1]);
for (byte a:msg.getMessage()){
//System.out.println(a);
}
byte[] message = msg.getMessage();
try {
Robot r = new Robot();
if(message[0] == -112){//按下
//System.out.println(message[1]);
Piano piano = new Piano(Integer.parseInt(message[1]+"")-9);
piano.start();
//r.keyPress(KeyEvent.VK_A);
bindKey(message[1]);
//System.out.println("press");
switch (message[1]){
case 83:
r.keyPress(0x6e);
break;
case 46:
r.keyPress(KeyEvent.VK_TAB);
break;
case 9:
r.keyPress(KeyEvent.VK_UP);
break;
case 93:
r.keyPress(KeyEvent.VK_DOWN);
break;
case 91:
r.keyPress(KeyEvent.VK_LEFT);
break;

case 95:
r.keyPress(KeyEvent.VK_RIGHT);
break;

case 39:
r.keyPress(KeyEvent.VK_CONTROL);
break;
case 42:
r.keyPress(KeyEvent.VK_SHIFT);
break;
case 44:
r.keyPress(KeyEvent.VK_ALT);
break;
case 49:
r.keyPress(KeyEvent.VK_1);
break;
case 51:
r.keyPress(KeyEvent.VK_2);
break;
case 54:
r.keyPress(KeyEvent.VK_3);
break;
case 56:
r.keyPress(KeyEvent.VK_4);
break;
case 58:
r.keyPress(KeyEvent.VK_5);
break;
case 61:
r.keyPress(KeyEvent.VK_6);
break;
case 63:
r.keyPress(KeyEvent.VK_7);
break;
case 66:
r.keyPress(KeyEvent.VK_8);
break;
case 68:
r.keyPress(KeyEvent.VK_9);
break;
case 70:
r.keyPress(KeyEvent.VK_0);
break;

case 36:
r.keyPress(KeyEvent.VK_A);
break;
case 38:
r.keyPress(KeyEvent.VK_B);
break;
case 40:
r.keyPress(KeyEvent.VK_C);
break;
case 41:
r.keyPress(KeyEvent.VK_D);
break;
case 43:
r.keyPress(KeyEvent.VK_E);
break;
case 45:
r.keyPress(KeyEvent.VK_F);
break;
case 47:
r.keyPress(KeyEvent.VK_G);
break;
case 48:
r.keyPress(KeyEvent.VK_H);
break;
case 50:
r.keyPress(KeyEvent.VK_I);
break;
case 52:
r.keyPress(KeyEvent.VK_J);
break;
case 53:
r.keyPress(KeyEvent.VK_K);
break;
case 55:
r.keyPress(KeyEvent.VK_L);
break;
case 57:
r.keyPress(KeyEvent.VK_M);
break;
case 59:
r.keyPress(KeyEvent.VK_N);
break;
case 60:
r.keyPress(KeyEvent.VK_O);
break;
case 62:
r.keyPress(KeyEvent.VK_P);
break;
case 64:
r.keyPress(KeyEvent.VK_Q);
break;
case 65:
r.keyPress(KeyEvent.VK_R);
break;
case 67:
r.keyPress(KeyEvent.VK_S);
break;
case 69:
r.keyPress(KeyEvent.VK_T);
break;
case 71:
r.keyPress(KeyEvent.VK_U);
break;
case 72:
r.keyPress(KeyEvent.VK_V);
break;
case 74:
r.keyPress(KeyEvent.VK_W);
break;
case 76:
r.keyPress(KeyEvent.VK_X);
break;
case 77:
r.keyPress(KeyEvent.VK_Y);
break;
case 79:
r.keyPress(KeyEvent.VK_Z);
break;

case 84:
r.keyPress(KeyEvent.VK_SPACE);
break;
case 88:
r.keyPress(KeyEvent.VK_BACK_SPACE);
break;
case 86:
r.keyPress(KeyEvent.VK_WINDOWS);
break;
case 96:
r.keyPress(KeyEvent.VK_ESCAPE);
break;
case 90:
r.keyPress(KeyEvent.VK_ENTER);
break;
case 37:
r.keyPress(0x6F);
break;
}
}
if(message[0] == -128){//松开
//System.out.println("release");
switch (message[1]){
case 83:
r.keyRelease(0x6e);
break;
case 46:
r.keyRelease(KeyEvent.VK_TAB);
break;
case 94:
r.keyRelease(KeyEvent.VK_UP);
break;
case 93:
r.keyRelease(KeyEvent.VK_DOWN);
break;
case 91:
r.keyRelease(KeyEvent.VK_LEFT);
break;

case 95:
r.keyRelease(KeyEvent.VK_RIGHT);
break;
case 39:
r.keyRelease(KeyEvent.VK_CONTROL);
break;
case 42:
r.keyRelease(KeyEvent.VK_SHIFT);
break;
case 44:
r.keyRelease(KeyEvent.VK_ALT);
break;
case 49:
r.keyRelease(KeyEvent.VK_1);
break;
case 51:
r.keyRelease(KeyEvent.VK_2);
break;
case 54:
r.keyRelease(KeyEvent.VK_3);
break;
case 56:
r.keyRelease(KeyEvent.VK_4);
break;
case 58:
r.keyRelease(KeyEvent.VK_5);
break;
case 61:
r.keyRelease(KeyEvent.VK_6);
break;
case 63:
r.keyRelease(KeyEvent.VK_7);
break;
case 66:
r.keyRelease(KeyEvent.VK_8);
break;
case 68:
r.keyRelease(KeyEvent.VK_9);
break;
case 70:
r.keyRelease(KeyEvent.VK_0);
break;

case 36:
r.keyRelease(KeyEvent.VK_A);
break;
case 38:
r.keyRelease(KeyEvent.VK_B);
break;
case 40:
r.keyRelease(KeyEvent.VK_C);
break;
case 41:
r.keyRelease(KeyEvent.VK_D);
break;
case 43:
r.keyRelease(KeyEvent.VK_E);
break;
case 45:
r.keyRelease(KeyEvent.VK_F);
break;
case 47:
r.keyRelease(KeyEvent.VK_G);
break;
case 48:
r.keyRelease(KeyEvent.VK_H);
break;
case 50:
r.keyRelease(KeyEvent.VK_I);
break;
case 52:
r.keyRelease(KeyEvent.VK_J);
break;
case 53:
r.keyRelease(KeyEvent.VK_K);
break;
case 55:
r.keyRelease(KeyEvent.VK_L);
break;
case 57:
r.keyRelease(KeyEvent.VK_M);
break;
case 59:
r.keyRelease(KeyEvent.VK_N);
break;
case 60:
r.keyRelease(KeyEvent.VK_O);
break;
case 62:
r.keyRelease(KeyEvent.VK_P);
break;
case 64:
r.keyRelease(KeyEvent.VK_Q);
break;
case 65:
r.keyRelease(KeyEvent.VK_R);
break;
case 67:
r.keyRelease(KeyEvent.VK_S);
break;
case 69:
r.keyRelease(KeyEvent.VK_T);
break;
case 71:
r.keyRelease(KeyEvent.VK_U);
break;
case 72:
r.keyRelease(KeyEvent.VK_V);
break;
case 74:
r.keyRelease(KeyEvent.VK_W);
break;
case 76:
r.keyRelease(KeyEvent.VK_X);
break;
case 77:
r.keyRelease(KeyEvent.VK_Y);
break;
case 79:
r.keyRelease(KeyEvent.VK_Z);
break;
case 84:
r.keyRelease(KeyEvent.VK_SPACE);
break;
case 96:
r.keyRelease(KeyEvent.VK_ESCAPE);
break;
case 88:
r.keyRelease(KeyEvent.VK_BACK_SPACE);
break;
case 90:
r.keyRelease(KeyEvent.VK_ENTER);
break;
case 86:
r.keyRelease(KeyEvent.VK_WINDOWS);
break;
case 37:
r.keyRelease(0x6F);
break;
}
}
} catch (AWTException e) {
e.printStackTrace();
}

}
public void close() {}


}
}
class Piano extends Thread{
int aaa;
Piano(int qwq){
aaa = qwq;
}
@Override
public void run(){
play(aaa);

}
public void play(int i){
stop(i);
MidiHandler.chosenClip = MidiHandler.sound[i];
MidiHandler.chosenClip.play();
}
public void stop(int i){
MidiHandler.chosenClip = MidiHandler.sound[i];
MidiHandler.chosenClip.stop();
}
}

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