Problem reading streams in a process

//run the process
Process p = Runtime.getRuntime().exec(new String[]{"c:/program.exe"});

//start two threads that read from his error and output
new ProcessOutputReader(p.getErrorStream());
new ProcessOutputReader(p.getInputStream());

//this class represents a thread reads from an inputstream
class ProcessOutputReader extends Thread
{
	//The input stream to read from
	private InputStream inp;

	//constructor
	public ProcessOutputReader(InputStream inp)
	{
		//store the stream
		this.inp = inp;
		
		//start the thread
		start();
	}

	public void run()
	{
		try
		{
			//create a byte array
			byte[] stuff = new byte[40];

			//read
			while(true)
			{
				//read some bytes
				int read = inp.read(stuff);
				//print them out
				System.out.print (new String(stuff, 0, read));
			}	
		}
		catch(Exception e)
		{
			System.out.println("Error!");	
		}	       
	}				
}