How to stop a thread waiting in a blocking read operation in Java?

Question

I have a thread that executes the following code:

public void run() {
    try {
        int n = 0;
        byte[] buffer = new byte[4096];
        while ((n          


        

Answer 1

If you want to give a user some time to enter data - maybe to allow overriding default values or interrupting some automated process -, then wait first and check available input after the pause:

System.out.println("Enter value+ENTER within 5 Seconds to override default value: ");
try{
  Thread.sleep(5000);
} catch {InterruptedException e){}

try{
  int bytes = System.in.available();
  if (bytes > 0) {
    System.out.println("Using user entered data ("+size+" bytes)");
  } else {
    System.out.println("Using default value"); 
  }
} catch(IOException e) { /*handle*/ }