gistfile1.java

import java.io.BufferedInputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.net.Socket;

public class Client {

    Socket socket = null;
    DataOutputStream os = null;
    DataInputStream is = null;

    public void initializeSocket() throws IOException {
        socket = new Socket("localhost", 9090);
        os = new DataOutputStream(socket.getOutputStream());
        is = new DataInputStream(socket.getInputStream());
    }

    public void sendText(String text) throws IOException {
        os.writeBoolean(true);
        os.writeChars(text);

    }

    public String getTextFromServer() throws InterruptedException, IOException {
        Thread.sleep(1000);
        if (is.available() > 0) {
            return is.readUTF();
        } else {
            return "";
        }
    }

    public void sendFile(File file) throws IOException {
        os.writeBoolean(false);
        byte[] mybytearray = new byte[(int) file.length()];
        BufferedInputStream bis = new BufferedInputStream(new FileInputStream(file));
        bis.read(mybytearray, 0, mybytearray.length);
        os.write(mybytearray, 0, mybytearray.length);
        os.flush();

    }

    public static void main(String[] args) throws IOException, InterruptedException {

        Client client = new Client();
        client.initializeSocket();
        client.sendText("salaaaaam");
        System.out.println(client.getTextFromServer());
        client.sendFile(new File("/Users/amir/Desktop/gate.txt"));

    }
}