[paulSteve]

I'm have and array of Maps and I want to create a thread for each map in the array and perform run() using the maps data. I have a class Run that implements runnable and I have an array of threads which all implement an instance of it. This was how I was taught to make threads and its worked so far. The problem I'm having is that each thread in the array needs to execution run() with a different map. I can't parameterize the class Run because then each Thread would have a different Run instance. How do I get the values needed to each thread?

[CasiOo]

Simply give them a map in their constructor

public class MyThread implements Runnable {
	private Map<Integer,Integer> map;
	
	public void MyThread(Map<Integer,Integer> map) {
		this.map = map;
	}

	public void run() {
	
	}
}

new Thread(new MyThread(maps[i])).start();

[Ghlavac]

Though you're gonna have to watch your synchronization.

[cfoley]

Quote

I can't parameterize the class Run because then each Thread would have a different Run instance.

Exactly! You do need a separate instance of Run for each thread. Incidentally, Run is a confusing name since there is a Runnable interface with a run() method. Why not call it MapProcessor or something even more descriptive.

[CasiOo]

Ghlavac, on 26 July 2012 - 09:25 AM, said:

Though you're gonna have to watch your synchronization.

Not if he is working on different maps