hi all , i'am new in java and i have this problem. my prgramm is

import java.io.*;
import javax.comm.*;

public class Sarla1 {
CommPortIdentifier portId = null;
SerialPort asyncPort = null;
OutputStream op = null;
InputStream ip = null;
public void connect() {
try {
portId = CommPortIdentifier.getPortIdentifier("COM3");
} catch (Exception x) {
System.out.println(x);
}
try {
asyncPort = (SerialPort) portId.open("vLab serial port", 4000);
} catch (Exception x) {
System.out.println(x);
}
try {
asyncPort.setSerialPortParams(57600, SerialPort.DATABITS_8,
SerialPort.STOPBITS_1,
SerialPort.PARITY_NONE);
} catch (Exception x) {
System.out.println(x);
}
try {
asyncPort.setFlowControlMode(SerialPort.FLOWCONTROL_RTSCTS_IN & SerialPort.
FLOWCONTROL_RTSCTS_OUT);
} catch (Exception x) {
System.out.println(x);
}
try {
op = asyncPort.getOutputStream();
} catch (Exception x) {}
try {
ip = asyncPort.getInputStream();
} catch (Exception x) {}
String code = "E2231\r";
String message = "atdt2310994186\r";
try {
op.write( message.getBytes());
} catch (Exception x) {}
String rxMessage="";
for (;;) {
try {
if (ip.available()>0) {
int k=ip.read();
System.out.print((char)k);
rxMessage = rxMessage+(char)k; if (rxMessage.indexOf("CONNECT")>0) break;
}
} catch (Exception x) {}
}

try {
for (int k=0; k<30; k++) {
String code = "E3701\r";
op.write(code.getBytes());
}
} catch (Exception x) {}

rxMessage="";
for (;;) {
try {
if (ip.available()>0) {
int k=ip.read();
}
} catch (Exception x) {}
System.out.print((char)k);
rxMessage = rxMessage+(char)k; if (rxMessage.indexOf("STOP")>0) break;
}
public static void main(String arg[]) {
Sarla1 ss = new Sarla1();
ss.connect();
}
}

the error message is public static void main(string arg []) in the fifth row from the bottom, and i can not figure it out. thanks!!!

I think that you will find that you need the code to be the following:



Hope that it helped.

thanks for your time , i try that but no results. i stil have the same error. some other idea?