CODEWITHSUNDEEP
javamultithreading
pawel
pawel

Reputation: 6136

How to get attributes of running Java Thread?

I have that code:

Main class:

public class myTest {

public static void main(String[] args) {

   try {
        Thread t1 = new Thread(new myThreadClass("thread 1"), "thread 1");
        t1.start();
    } catch (UnknownHostException ex) {
        Logger.getLogger(glownyTest.class.getName()).log(Level.SEVERE, null, ex);
    } catch (IOException ex) {
        Logger.getLogger(glownyTest.class.getName()).log(Level.SEVERE, null, ex);
    }  

 }
}

My Thread class

public class myThreadClass extends Thread {

private HashSet<String> texts = new HashSet<String>();

public myThreadClass(String id) throws UnknownHostException, IOException {}

@Override
public void run() {
     ... collecting Strings into my hashSet ....
}

public HashSet<String> getTexts() {
    return texts;
}
}

I've tried to call 

t1.getTexts();

in my Main Class after starting the thread, but it doesn't work - I want to access texts hashSet from my Main Class level. How to achieve it?

Upvotes: 1

Views: 1492

Answers (4)

Petros Tsialiamanis
Petros Tsialiamanis

Reputation: 2758

myThreadClass t1 = new myThreadClass("thread 1");
t1.start()
try{
t1.join();
t1.getTexts();
}catch(InterruptedException x){
 ....
}

Usually the first letter of the class name is capital.

Upvotes: 0

Tim Bender
Tim Bender

Reputation: 20442

If you are trying to access a method belonging to your type myThreadClass then you need to be sure to declare the variable as an instance of that type.

Like so:

myThreadClass t1 = new myThreadClass("thread 1");

There are some problems you are likely to run into ... like needing to join the Thread to be sure that it finishes populating the HashSet.

Upvotes: 1

Kishor Raskar
Kishor Raskar

Reputation: 116

You can either create reference of myThreadClass 

myThreadClass t1

or

cast your reference to myThreadClass like

((myThreadClass )t1).getTexts();

This will work!!

Upvotes: 0

Marko Topolnik
Marko Topolnik

Reputation: 200158

Do not abuse the Thread class for your program logic. You should build your custom Runnable implementation, which you pass into Thread's constructor. That way the separation of concerns between thread control and your program logic will be more apparent to you.

Upvotes: 0

Related Questions