public class ManyThreads {
    public static void main(String[] args) {
        final int THREAD_COUNT = 5000;
        
        for (int i = 0; i < THREAD_COUNT; i++) {
            new Thread(() -> {
                while (true) {
                    try {
                        Thread.sleep(1000);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }
            }).start();
            
        }
        
        System.out.println("All " + THREAD_COUNT + " threads created!");

        while (true) {
            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }
}