循环问题

Question

I'm reading data from a serial port inside a while-loop as follows:

while((len = this.getIn().read(buffer)) > 0) {
    data = new String(buffer, 0, len);
    System.out.println("data len " + len);
    handleModemresponse(data);
}

but, while reading the data from the stream starts, the main AWT window, which has a disconnect button, is not getting any listeners (the whole window not getting listeners). It only listens when transfer completes, ie, outside the while-loop.

I want my AWT window to listen for my actions when it is in the while-loop also.

Any ideas how I can achieve this?

Answer 1

Create a new Thread for the read action.

public class LongProcess implements Runnable {
  public void startProcess() {
    Thread t = new Thread(this);
    t.start();
  }

      public void run() {
// Define inputstream here
        while((len = inputStream.read(buffer)) > 0) {
         data = new String(buffer, 0, len);
         System.out.println("data len " + len);
         handleModemresponse(data);
        }
      }
    }

EDIT (after comment Tom Hawtin - tackline):

SwingUtilities.invokeLater(new LongProcess ());

Answer 2

It looks like you have everything in one thread - thus while your working method is in progress, your GUI seems blocked and does not respond to any actions until the loop ends.

You have to separate your GUI attendance in one thread and your working method in another.

Answer 3

The read method you are calling is blocking. You need to move it in a different thread in order for your listeners to keep working.

Answer 4

我怀疑您应该将此while循环推入一个单独的线程中，以免在传输过程中占用AWT线程。