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이것은 직렬 입력을 읽는 프로그램으로 모든 것이 잘 작동합니다. 성공적으로 컴파일하지만 아래 코드를 실행하려고하면 아래에 첨부 한 이미지의 오류가 표시됩니다.Java 런타임 오류
import java.io.*;
import java.util.*;
import gnu.io.*;
import java.sql.*;
public class SimpleRead implements Runnable, SerialPortEventListener {
static CommPortIdentifier portId;
static Enumeration portList;
static Connection con=null;
static String url = "jdbc:mysql://localhost:3306/track";
static String uid="root";
static String pwd="root";
InputStream inputStream;
SerialPort serialPort;
Thread readThread;
public static void main(String[] args) {
portList = CommPortIdentifier.getPortIdentifiers();
while (portList.hasMoreElements()) {
portId = (CommPortIdentifier) portList.nextElement();
if (portId.getPortType() == CommPortIdentifier.PORT_SERIAL) {
if (portId.getName().equals("COM1")) {
// if (portId.getName().equals("/dev/term/a")) {
SimpleRead reader = new SimpleRead();
try
{
Class.forName("com.mysql.jdbc.Driver");
con = DriverManager.getConnection(url,uid,pwd);
}
catch(Exception s){
System.out.println(s);
}
}
}
}
}
public SimpleRead() {
try {
serialPort = (SerialPort) portId.open("SimpleReadApp", 2000);
} catch (PortInUseException e) {System.out.println(e);}
try {
inputStream = serialPort.getInputStream();
} catch (IOException e) {System.out.println(e);}
try {
serialPort.addEventListener(this);
} catch (TooManyListenersException e) {System.out.println(e);}
serialPort.notifyOnDataAvailable(true);
try {
serialPort.setSerialPortParams(9600,
SerialPort.DATABITS_8,
SerialPort.STOPBITS_1,
SerialPort.PARITY_NONE);
} catch (UnsupportedCommOperationException e) {System.out.println(e);}
readThread = new Thread(this);
readThread.start();
}
public void run() {
try {
Thread.sleep(20000);
} catch (InterruptedException e) {System.out.println(e);}
}
public void serialEvent(SerialPortEvent event) {
switch(event.getEventType()) {
case SerialPortEvent.BI:
case SerialPortEvent.OE:
case SerialPortEvent.FE:
case SerialPortEvent.PE:
case SerialPortEvent.CD:
case SerialPortEvent.CTS:
case SerialPortEvent.DSR:
case SerialPortEvent.RI:
case SerialPortEvent.OUTPUT_BUFFER_EMPTY:
break;
case SerialPortEvent.DATA_AVAILABLE:
byte[] readBuffer = new byte[8];
try {
while (inputStream.available() > 0) {
int numBytes = inputStream.read(readBuffer);
}
System.out.print(new String(readBuffer));
} catch (IOException e) {System.out.println(e);}
Statement st=null;
try{
st=con.createStatement();
}
catch(Exception ex){
System.out.println(ex);
}
try{
String idd = new String(readBuffer);
if(idd.equals("05447646")||idd.equals("05447647")||idd.equals("05447649")||idd.equals("05447650")){
String query = "INSERT INTO tablename1 (id) VALUES(?)";
PreparedStatement pstm = con.prepareStatement(query);
pstm.setString(1, idd);
pstm.executeUpdate();
pstm.close();}
//st.executeUpdate("insert into asset(id) VALUES('"+idd+"'");
//con.close();
}
catch(Exception ex){
System.out.println(ex);
}
}
}}
오류 이미지 : 자바가 시스템에 설치되어있는
이
java -version이에
오류 이미지는 ** 읽을 ** 있습니다. 오류를 복사하여 질문에 붙여 넣으십시오. –
jdk의 2 가지 버전이 설치되어 있습니까 ?? : 32 비트 및 64 비트 – codeMan
'잘못된 경로'입니다. Java 경로를 확인하고 JAVA_HOME이 올바른지 확인하십시오. –