Question

I have a class that has three threads and a hashmap that stores data. One of the threads writes data to hashmap and two other read it. Something like this:

public static class collector{
  Thread writter;
  Thread reader1;
  Thread reader2;
  HashMap storage;
  ...
  public void write(String s){
    storage.put(s.hashcode(),s);
  }
  public String read(long hash){
    return storage.get(hash);
  }
  public Set readAll(){
    return storage.entrySet();
  }
}

I want the first thread (writer) to run the first method (write), and reader1 run read and reader 2 run readAll. But I couldn’t find anyway to access storage in threads (run method). How can I write threads to run like these 3 methods while they all have access to storage at the same time?

Answer 1

Since your class is static you can simply call collector.write from thread’s run method.