Null Pointer Exception with SocketChannel

[glup klosar]

Here is the code, any help/ideas/suggestions are greatly appreciated :

    


package DataTransfer;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.net.InetAddress;
import java.net.Socket;
import java.nio.channels.FileChannel;
import java.nio.channels.SocketChannel;

class Send extends Thread{
	
	String receiverName; String senderName;
	String outputFileName; String inputFileName;
	
	public Send(String sn, String rn, String inf, String of){
		senderName = sn; receiverName = rn; inputFileName = inf; outputFileName = of;
	}
	
	public void run(){ 
		try{
			InetAddress receiverAddress = InetAddress.getByName(receiverName);
			int port=4444, localPort=4444;  
			InetAddress localAddr = InetAddress.getByName(senderName);  
			System.out.println("start send");
			Socket sendSocket = new Socket(receiverAddress, port, localAddr,  localPort); 
			OutputStream dataOutput = sendSocket.getOutputStream();
			FileInputStream in = new FileInputStream(inputFileName);
			FileChannel fromFile = in.getChannel();
			SocketChannel toSocket;
			
			SocketChannel.open(); //this is apparently the right order
			toSocket = sendSocket.getChannel();
			System.out.println(toSocket==null);//prints true
			 
			System.out.println(toSocket.isConnected());//throws NullPointerException
			
			long bytesWritten = 0;
			long byteCount = fromFile.size();
			while (bytesWritten < byteCount) 
			      bytesWritten += fromFile.transferTo(bytesWritten, byteCount - bytesWritten, toSocket); //problem
			
			sendSocket.close();
			fromFile.close();
			toSocket.close();
		    dataOutput.close();in.close();
		}catch (IOException e) {System.out.println(e.toString());}
	  }
	 
	}

[Joe Ess]

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