Java Question "constructor cannot be applied to given types" What does it mean ?

[coslad]

Hello everyone
with the help of members of the italian forum and with the Erel's tool i have wrapped a library, but when i tried to compile a sample , it comes out this error

Public datatcp As DataIsoTCP
javac 1.7.0_67
src\b4a\nodavetest\main.java:340: error: constructor DataIsoTCP in class DataIsoTCP cannot be applied to given types;
_datatcp = new nodave.DataIsoTCP();
           ^
  required: String
  found: no arguments
  reason: actual and formal argument lists differ in length
1 error

the java code costructor is this :

public class DataIsoTCP {
    public static boolean Connection = false;
    public static int i, j;
    public static long a, b, c;
    public static float d, e, f;
    public static char buf[];
    public static byte buf1[];
    public static PLCinterface di;
    public static TCPConnection dc;
    public static Socket sock;
    public static int slot;
    public static byte[] by;
    public static String IP;
    // IP 192.168.1.101
    DataIsoTCP(String host) {
        IP = host;
        // Nodave.Debug=Nodave.DEBUG_ALL;
        buf = new char[Nodave.OrderCodeSize];
        buf1 = new byte[Nodave.PartnerListSize];
        try {
            sock = new Socket(host, 102);
        } catch (IOException e) {
            System.out.println(e);
        }
    }
    public static void StartConnection() {
        Connection = false;
        OutputStream oStream = null;
        InputStream iStream = null;
        slot = 2;
        if (sock != null) {
            try {
                oStream = sock.getOutputStream();
            } catch (IOException e) {
            }
            try {
                iStream = sock.getInputStream();
            } catch (IOException e) {
            }
            di = new PLCinterface(oStream, iStream, "IF1", 0,
                    Nodave.PROTOCOL_ISOTCP);
            dc = new TCPConnection(di, 0, slot);
            int res = dc.connectPLC();
            if (0 == res) {
                Connection = true;
                System.out.println("Connection OK ");
            } else {
                System.out.println("No connection");
            }
        }
    }
    public static void StopConnection() {
        if (Connection == true) {
            Connection = false;
            dc.disconnectPLC();
            di.disconnectAdapter();
        }
    }
    // read 4 bytes from MD 100
    public static long ReadData() {
        dc.readBytes(Nodave.FLAGS, 0, 100, 4, null);
        a = dc.getU32();
        return (long) a;
    }
    // write 4 bytes to MD 100
    public static void WriteData(long a) {
        by = Nodave.bswap_32(a);
        dc.writeBytes(Nodave.FLAGS, 0, 100, 4, by);
    }
    public static void ConnectIsoTcp(String adres) {
        Nodave.Debug = Nodave.DEBUG_ALL
                ^ (Nodave.DEBUG_IFACE | Nodave.DEBUG_SPECIALCHARS);
        DataIsoTCP tp = new DataIsoTCP(adres);
        tp.StartConnection();
    }
}

any help ??

Thanks

 

[coslad]

Hello
i understood the meaning of error , but i don't know java and i need help to solve the problem .
In this forum there are many user that wraps library often , i think that the way to solve this problem is already known .
Thanks

 

[Erel]

You will need to remove this constructor and change it to a regular method.

 

[coslad]

Thanks for reply but it is not so simple as seems, that class is called from other class of the same library and if I change the constructor I need to change a lot of code.