Java serial lines

Last tested around 2014.

To list serial ports:

import java.util.Enumeration;
import javax.comm.CommPortIdentifier;
public class ListPorts {
    public static void main(String[] args) {
        Enumeration<CommPortIdentifier> e =
            CommPortIdentifier.getPortIdentifiers();
        while (e.hasMoreElements()) {
            CommPortIdentifier ident = e.nextElement();
            System.out.println(ident.getName());
            System.out.println(ident.getPortType());
        }
    }
}

To test ports:

import java.util.Enumeration;
import javax.comm.SerialPort;
import javax.comm.CommPortIdentifier;
import javax.comm.CommPort;
import java.io.InputStream;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.IOException;
import javax.comm.PortInUseException;

public class TestPort {
    public static void main(String[] args) throws IOException,PortInUseException {
        Enumeration<CommPortIdentifier> e =
            CommPortIdentifier.getPortIdentifiers();
        while (e.hasMoreElements()) {
            CommPortIdentifier ident = e.nextElement();
            System.out.println(ident.getName());
            System.out.println(ident.getPortType());
            if (ident.getPortType() == CommPortIdentifier.PORT_SERIAL) {
                System.out.println(ident.getCurrentOwner());
                CommPort port = ident.open("TestPort", 1000);
                SerialPort sport = (SerialPort) port;
                InputStream is = port.getInputStream();
                BufferedReader rd = new BufferedReader(new InputStreamReader(is));
                System.out.println("Testing port " + ident.getName());
                System.out.println("Carrier Detect is " + sport.isCD());
                for (int i = 1; i < 4; i++) {
                    System.out.println(rd.readLine());
                }
            }
        }

    }
}