OnJava8-Examples/lowlevel/ThreadSize.java

// lowlevel/ThreadSize.java
// (c)2017 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
// {ExcludeFromGradle} Takes a long time or hangs
import java.util.concurrent.*;
import onjava.Nap;

public class ThreadSize {
  static class Dummy extends Thread {
    @Override
    public void run() { new Nap(1); }
  }
  public static void main(String[] args) {
    ExecutorService exec =
      Executors.newCachedThreadPool();
    int count = 0;
    try {
      while(true) {
        exec.execute(new Dummy());
        count++;
      }
    } catch(Error e) {
      System.out.println(
        e.getClass().getSimpleName() + ": " + count);
      System.exit(0);
    } finally {
      exec.shutdown();
    }
  }
}