.轡螢▲訥命を行いたいEclipseのpackage下に追加ライブラリ用のフォルダを作る(名前は何でもいいけど写真ではlib)
追加用のライブラリをインストール
このフォルダを解凍した中の、
rxtxParallel.dll
rxtxSerial.dll
RXTXcomm.jar
をコピーして、,離侫ルダ内にペースト
EclipseでLibrary Pathを追加する
ぅ廛蹈哀薀犧鄒
 //port check
 //JDK check
 import java.io.*;
 public class CommLight{
	static File sharedText;
	
	public static void main(String[] args){
       
       SerialComm serialcomm = new SerialComm();
       serialcomm.open();
       int i = 10;
       while(i>0){
       	serialcomm.write((byte)0x34);
       	try{
           	Thread.sleep(500);
           }catch(Exception e){
           	
           }
           serialcomm.write((byte)0x20);
           try{
           	Thread.sleep(500);
           }catch(Exception e){
           	
           }
           serialcomm.write((byte)0x78);
           try{
           	Thread.sleep(500);
           }catch(Exception e){
           	
           }
           i--;
       }
		System.out.println("Hello, World");
	}
} import gnu.io.*;
 import java.io.*;
 import java.util.*;
 public class SerialComm implements SerialPortEventListener{
	private SerialPort port;
 //	private static BufferedReader reader;
	private InputStream in;
	private OutputStream out;
	SerialComm(){
		super();
	}
	public void open(){
		try {
			// Serial port initialize
			CommPortIdentifier portId = CommPortIdentifier.getPortIdentifier("COM6");
			port = (SerialPort)portId.open("USB Serial Port", 2000);
			port.setSerialPortParams(
					9600,					 // í êMë¨ìx[bps]
					SerialPort.DATABITS_8,   // ÉfÅ[É^ÉrÉbÉgêî
					SerialPort.STOPBITS_1,   // ÉXÉgÉbÉvÉrÉbÉg
					SerialPort.PARITY_NONE   // ÉpÉäÉeÉB
					);
			port.setFlowControlMode(SerialPort.FLOWCONTROL_NONE);
			try{
				port.addEventListener(this);
				port.notifyOnDataAvailable(true);
				
				in = port.getInputStream();
				out = port.getOutputStream();
			}catch(TooManyListenersException ex){
				System.out.println("Error1: "+ex);
			}
		} catch (Exception e) {
			System.out.println("Error2: " + e);
			System.exit(1);
		}
	}
	public void close(){
		try{
			in.close();
			out.close();
			port.close();
		}catch(Exception e){
			System.out.println("close: "+e);
		}
	}
	public void read(){
		try{
			byte[] buffer;
			int temp = in.available();
			if(temp>0){
				System.out.println("temp: "+temp);
				buffer = new byte[temp];
				temp = in.read(buffer);
				int num = 0;
				while(num<temp){
					System.out.println("b "+num+": "+Integer.toHexString((byte)buffer[num]));
					num++;
				}
			}
			in.close();
		}catch(Exception e){
			System.out.println("error4: "+e);
		}
	}
	public static String toHex(byte[] digest) {
		StringBuilder sb = new StringBuilder();
		for (byte b : digest) {
			sb.append(String.format("%1$02X", b));
		}
		return sb.toString();
	}
	public void write(byte data){
		try{
			out.write((byte)data);   
			out.flush();
			//ÉXÉgÉäÅ[ÉÄÇ∆COMÉ|Å[ÉgÇï¬Ç∂ÇÈèàóù
		}catch(Exception e){
			System.out.println("port exception: "+e);
		}
	}
	public void run() {
		try {
			InputStreamReader isr = new InputStreamReader(System.in);
			BufferedReader br = new BufferedReader(isr);
			OutputStream out = port.getOutputStream();
			boolean flagQuit = false;
			while (!flagQuit) {
				String input = br.readLine();
				if (input.length() > 0) {
					if (input.equals(":quit"))
						break;
					input += "\r";
					out.write(input.getBytes("US-ASCII"));
				}
			}
			port.close();
		} catch (Exception e) {
			System.out.println("Error3: " + e);
		}
	}
	public void serialEvent(SerialPortEvent event) {
		if (event.getEventType() == SerialPortEvent.DATA_AVAILABLE) {
			read();
		}
	}
 }ゴ粟