{"id":78430,"date":"2024-03-20T19:49:19","date_gmt":"2024-03-20T10:49:19","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/java-%e3%81%a7%e3%82%b7%e3%83%aa%e3%82%a2%e3%83%ab%e3%83%9d%e3%83%bc%e3%83%88%e3%81%8b%e3%82%89%e3%83%87%e3%83%bc%e3%82%bf%e3%82%92%e8%aa%ad%e3%81%bf%e8%be%bc%e3%82%80%e6%96%b9%e6%b3%95%e3%81%af\/"},"modified":"2025-08-12T02:10:07","modified_gmt":"2025-08-11T17:10:07","slug":"java-%e3%81%a7%e3%82%b7%e3%83%aa%e3%82%a2%e3%83%ab%e3%83%9d%e3%83%bc%e3%83%88%e3%81%8b%e3%82%89%e3%83%87%e3%83%bc%e3%82%bf%e3%82%92%e8%aa%ad%e3%81%bf%e8%be%bc%e3%82%80%e6%96%b9%e6%b3%95%e3%81%af","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/java-%e3%81%a7%e3%82%b7%e3%83%aa%e3%82%a2%e3%83%ab%e3%83%9d%e3%83%bc%e3%83%88%e3%81%8b%e3%82%89%e3%83%87%e3%83%bc%e3%82%bf%e3%82%92%e8%aa%ad%e3%81%bf%e8%be%bc%e3%82%80%e6%96%b9%e6%b3%95%e3%81%af\/","title":{"rendered":"Java \u3067\u30b7\u30ea\u30a2\u30eb\u30dd\u30fc\u30c8\u304b\u3089\u30c7\u30fc\u30bf\u3092\u8aad\u307f\u8fbc\u3080\u65b9\u6cd5\u306f?"},"content":{"rendered":"

Java\u306b\u304a\u3044\u3066\u3001\u30b7\u30ea\u30a2\u30eb\u30dd\u30fc\u30c8\u306e\u30c7\u30fc\u30bf\u3092\u8aad\u307f\u53d6\u308b\u306b\u306fRXTXcomm\u30e9\u30a4\u30d6\u30e9\u30ea\u307e\u305f\u306fJSerialComm\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u4f7f\u7528\u3067\u304d\u307e\u3059\u30021. RXTXcomm\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u4f7f\u7528\u3059\u308b\u5834\u5408\uff1a\u307e\u305a\u3001RXTXcomm\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3057\u3066\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u305d\u306e\u5f8c\u3001RXTXcomm\u30e9\u30a4\u30d6\u30e9\u30ea\u306eSerialPort\u30af\u30e9\u30b9\u3092\u4f7f\u7528\u3057\u3066\u30b7\u30ea\u30a2\u30eb\u30dd\u30fc\u30c8\u63a5\u7d9a\u3092\u958b\u304d\u307e\u3059\u3002\u305f\u3068\u3048\u3070\u3001\u6b21\u306e\u3088\u3046\u306b\u3057\u307e\u3059\u3002<\/p>\n

\u00a0\u00a0\u00a0\u00a0import\u00a0gnu.io.CommPortIdentifier;<\/pre>\n
import\u00a0gnu.io.SerialPort;<\/p>\n
 <\/p>\n
import\u00a0gnu.io.SerialPortEvent;<\/p>\n
 <\/p>\n
import\u00a0gnu.io.SerialPortEventListener;<\/p>\n
 <\/p>\n
import\u00a0gnu.io.UnsupportedCommOperationException;<\/p>\n
 <\/p>\n
 <\/p>\n
 <\/p>\n
import\u00a0java.io.BufferedReader;<\/p>\n
 <\/p>\n
import\u00a0java.io.IOException;<\/p>\n
 <\/p>\n
import\u00a0java.io.InputStreamReader;<\/p>\n
 <\/p>\n
import\u00a0java.io.OutputStream;<\/p>\n
 <\/p>\n
 <\/p>\n
 <\/p>\n
public\u00a0class\u00a0SerialPortReader\u00a0implements\u00a0SerialPortEventListener\u00a0{<\/p>\n
 <\/p>\n
 <\/p>\n
 <\/p>\n
private\u00a0BufferedReader\u00a0input;<\/p>\n
 <\/p>\n
private\u00a0OutputStream\u00a0output;<\/p>\n
 <\/p>\n
 <\/p>\n
 <\/p>\n
public\u00a0SerialPortReader()\u00a0{<\/p>\n
 <\/p>\n
try\u00a0{<\/p>\n
 <\/p>\n
\/\/\u00a0\u83b7\u53d6\u4e32\u53e3\u6807\u8bc6\u7b26<\/p>\n
 <\/p>\n
CommPortIdentifier\u00a0portId\u00a0=\u00a0CommPortIdentifier.getPortIdentifier(\u201cCOM1\u201d);<\/p>\n
 <\/p>\n
\/\/\u00a0\u6253\u5f00\u4e32\u53e3\u8fde\u63a5<\/p>\n
 <\/p>\n
SerialPort\u00a0serialPort\u00a0=\u00a0(SerialPort)\u00a0portId.open(\u201cSerialPortReader\u201d,\u00a02000);<\/p>\n
 <\/p>\n
\/\/\u00a0\u8bbe\u7f6e\u4e32\u53e3\u53c2\u6570<\/p>\n
 <\/p>\n
serialPort.setSerialPortParams(9600,\u00a0SerialPort.DATABITS_8,\u00a0SerialPort.<\/p>\n
 <\/p>\n
STOPBITS_1,\u00a0SerialPort.PARITY_NONE);<\/p>\n
 <\/p>\n
\/\/\u00a0\u83b7\u53d6\u8f93\u5165\u8f93\u51fa\u6d41<\/p>\n
 <\/p>\n
input\u00a0=\u00a0new\u00a0BufferedReader(new\u00a0InputStreamReader(serialPort.getInputStream()));<\/p>\n
 <\/p>\n
output\u00a0=\u00a0serialPort.getOutputStream();<\/p>\n
 <\/p>\n
\/\/\u00a0\u6dfb\u52a0\u4e32\u53e3\u4e8b\u4ef6\u76d1\u542c\u5668<\/p>\n
 <\/p>\n
serialPort.addEventListener(this);<\/p>\n
 <\/p>\n
serialPort.notifyOnDataAvailable(true);<\/p>\n
 <\/p>\n
}\u00a0catch\u00a0(Exception\u00a0e)\u00a0{<\/p>\n
 <\/p>\n
e.printStackTrace();<\/p>\n
 <\/p>\n
}<\/p>\n
 <\/p>\n
}<\/p>\n
 <\/p>\n
 <\/p>\n
 <\/p>\n
@Override<\/p>\n
 <\/p>\n
public\u00a0void\u00a0serialEvent(SerialPortEvent\u00a0event)\u00a0{<\/p>\n
 <\/p>\n
\/\/\u00a0\u4e32\u53e3\u6570\u636e\u53ef\u7528\u65f6\u89e6\u53d1\u8be5\u4e8b\u4ef6<\/p>\n
 <\/p>\n
if\u00a0(event.getEventType()\u00a0==\u00a0SerialPortEvent.DATA_AVAILABLE)\u00a0{<\/p>\n
 <\/p>\n
try\u00a0{<\/p>\n
 <\/p>\n
\/\/\u00a0\u8bfb\u53d6\u4e32\u53e3\u6570\u636e<\/p>\n
 <\/p>\n
String\u00a0inputLine\u00a0=\u00a0input.readLine();<\/p>\n
 <\/p>\n
System.out.println(\u201c\u63a5\u6536\u5230\u7684\u6570\u636e\uff1a\u201d\u00a0+\u00a0inputLine);<\/p>\n
 <\/p>\n
}\u00a0catch\u00a0(IOException\u00a0e)\u00a0{<\/p>\n
 <\/p>\n
e.printStackTrace();<\/p>\n
 <\/p>\n
}<\/p>\n
 <\/p>\n
}<\/p>\n
 <\/p>\n
}<\/p>\n
 <\/p>\n
 <\/p>\n
 <\/p>\n
public\u00a0void\u00a0sendData(String\u00a0data)\u00a0{<\/p>\n
 <\/p>\n
try\u00a0{<\/p>\n
 <\/p>\n
\/\/\u00a0\u53d1\u9001\u6570\u636e\u5230\u4e32\u53e3<\/p>\n
 <\/p>\n
output.write(data.getBytes());<\/p>\n
 <\/p>\n
}\u00a0catch\u00a0(IOException\u00a0e)\u00a0{<\/p>\n
 <\/p>\n
e.printStackTrace();<\/p>\n
 <\/p>\n
}<\/p>\n
 <\/p>\n
}<\/p>\n
 <\/p>\n
 <\/p>\n
 <\/p>\n
public\u00a0static\u00a0void\u00a0main(String[]\u00a0args)\u00a0{<\/p>\n
 <\/p>\n
SerialPortReader\u00a0reader\u00a0=\u00a0new\u00a0SerialPortReader();<\/p>\n
 <\/p>\n
reader.sendData(\u201cHello,\u00a0Serial\u00a0Port!\u201d);<\/p>\n
 <\/p>\n
}<\/p>\n
 <\/p>\n
}<\/p>\n
<\/pre>\n
\u30b3\u30f3\u30bd\u30fc\u30eb\u306b\u51fa\u529b\u3055\u308c\u308b\u3001\u53d7\u4fe1\u30b7\u30ea\u30a2\u30eb\u30c7\u30fc\u30bf\u3092\u51e6\u7406\u3057\u307e\u3059\u30022. JSerialComm\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u4f7f\u7528\u3059\u308b: \u307e\u305a\u3001JSerialComm\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u3057\u3066\u30a4\u30f3\u30dd\u30fc\u30c8\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u6b21\u306b\u3001SerialPort\u30af\u30e9\u30b9\u3092\u4f7f\u7528\u3057\u3066\u30b7\u30ea\u30a2\u30eb\u63a5\u7d9a\u3092\u958b\u304d\u307e\u3059\u3002\u4f8b:<\/p>\n
\u00a0\u00a0\u00a0\u00a0import\u00a0com.fazecast.jSerialComm.SerialPort;<\/pre>\n
 <\/p>\n
import\u00a0com.fazecast.jSerialComm.SerialPortDataListener;<\/p>\n
 <\/p>\n
import\u00a0com.fazecast.jSerialComm.SerialPortEvent;<\/p>\n
 <\/p>\n
 <\/p>\n
 <\/p>\n
public\u00a0class\u00a0SerialPortReader\u00a0{<\/p>\n
 <\/p>\n
 <\/p>\n
 <\/p>\n
public\u00a0SerialPortReader()\u00a0{<\/p>\n
 <\/p>\n
\/\/\u00a0\u83b7\u53d6\u4e32\u53e3\u5217\u8868<\/p>\n
 <\/p>\n
SerialPort[]\u00a0ports\u00a0=\u00a0SerialPort.getCommPorts();<\/p>\n
 <\/p>\n
if\u00a0(ports.length\u00a0>\u00a00)\u00a0{<\/p>\n
 <\/p>\n
\/\/\u00a0\u6253\u5f00\u7b2c\u4e00\u4e2a\u4e32\u53e3\u8fde\u63a5<\/p>\n
 <\/p>\n
SerialPort\u00a0serialPort\u00a0=\u00a0ports[0];<\/p>\n
 <\/p>\n
serialPort.openPort();<\/p>\n
 <\/p>\n
\/\/\u00a0\u8bbe\u7f6e\u4e32\u53e3\u53c2\u6570<\/p>\n
 <\/p>\n
serialPort.setBaudRate(9600);<\/p>\n
 <\/p>\n
serialPort.setNumDataBits(8);<\/p>\n
 <\/p>\n
serialPort.setNumStopBits(1);<\/p>\n
 <\/p>\n
serialPort.setParity(SerialPort.NO_PARITY);<\/p>\n
 <\/p>\n
\/\/\u00a0\u6dfb\u52a0\u4e32\u53e3\u6570\u636e\u76d1\u542c\u5668<\/p>\n
 <\/p>\n
serialPort.addDataListener(new\u00a0SerialPortDataListener()\u00a0{<\/p>\n
 <\/p>\n
@Override<\/p>\n
 <\/p>\n
public\u00a0int\u00a0getListeningEvents()\u00a0{<\/p>\n
 <\/p>\n
return\u00a0SerialPort.LISTENING_EVENT_DATA_AVAILABLE;<\/p>\n
 <\/p>\n
}<\/p>\n
 <\/p>\n
 <\/p>\n
 <\/p>\n
@Override<\/p>\n
 <\/p>\n
public\u00a0void\u00a0serialEvent(SerialPortEvent\u00a0event)\u00a0{<\/p>\n
 <\/p>\n
if\u00a0(event.getEventType()\u00a0==\u00a0SerialPort.LISTENING_EVENT_DATA_<\/p>\n
 <\/p>\n
AVAILABLE)\u00a0{<\/p>\n
 <\/p>\n
\/\/\u00a0\u8bfb\u53d6\u4e32\u53e3\u6570\u636e<\/p>\n
 <\/p>\n
byte[]\u00a0buffer\u00a0=\u00a0new\u00a0byte[serialPort.bytesAvailable()];<\/p>\n
 <\/p>\n
int\u00a0bytesRead\u00a0=\u00a0serialPort.readBytes(buffer,\u00a0buffer.length);<\/p>\n
 <\/p>\n
String\u00a0inputLine\u00a0=\u00a0new\u00a0String(buffer,\u00a00,\u00a0bytesRead);<\/p>\n
 <\/p>\n
System.out.println(\u201c\u63a5\u6536\u5230\u7684\u6570\u636e\uff1a\u201d\u00a0+\u00a0inputLine);<\/p>\n
 <\/p>\n
}<\/p>\n
 <\/p>\n
}<\/p>\n
 <\/p>\n
});<\/p>\n
 <\/p>\n
}<\/p>\n
 <\/p>\n
}<\/p>\n
 <\/p>\n
 <\/p>\n
 <\/p>\n
public\u00a0static\u00a0void\u00a0main(String[]\u00a0args)\u00a0{<\/p>\n
 <\/p>\n
SerialPortReader\u00a0reader\u00a0=\u00a0new\u00a0SerialPortReader();<\/p>\n
 <\/p>\n
}<\/p>\n
 <\/p>\n
}<\/p>\n
<\/pre>\n
\u30b3\u30f3\u30bd\u30fc\u30eb\u306b\u30b7\u30ea\u30a2\u30eb\u30dd\u30fc\u30c8\u304b\u3089\u53d7\u4fe1\u3057\u305f\u30c7\u30fc\u30bf\u3092\u30a2\u30a6\u30c8\u30d7\u30c3\u30c8\u3057\u307e\u3059\u3002\u3053\u306e\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u306f\u30b7\u30ea\u30a2\u30eb\u30dd\u30fc\u30c8\u3068\u306e\u63a5\u7d9a\u306e\u958b\u304d\u65b9\u3001\u30b7\u30ea\u30a2\u30eb\u30dd\u30fc\u30c8\u306e\u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u8a2d\u5b9a\u3001\u30b7\u30ea\u30a2\u30eb\u30dd\u30fc\u30c8\u306e\u30c7\u30fc\u30bf\u306e\u8aad\u307f\u53d6\u308a\u65b9\u306a\u3069\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002\u3042\u306a\u305f\u81ea\u8eab\u306e\u5fc5\u8981\u306b\u5fdc\u3058\u3066\u3001\u9069\u5b9c\u5909\u66f4\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
Java\u306b\u304a\u3044\u3066\u3001\u30b7\u30ea\u30a2\u30eb\u30dd\u30fc\u30c8\u306e\u30c7\u30fc\u30bf\u3092\u8aad\u307f\u53d6\u308b\u306b\u306fRXTXcomm\u30e9\u30a4\u30d6\u30e9\u30ea\u307e\u305f\u306fJSerialComm\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u4f7f\u7528\u3067\u304d\u307e\u3059\u30021. 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