how to get attribute through id best way code example

Example 1: angular read element from html by atribute name

int number = 20;
Thread newThread = new Thread(() -> {
    System.out.println("Factorial of " + number + " is: " + factorial(number));
});
newThread.start();

Example 2: angular read element from html by atribute name

ExecutorService threadpool = Executors.newCachedThreadPool();
Future<Long> futureTask = threadpool.submit(() -> factorial(number));
 
while (!futureTask.isDone()) {
    System.out.println("FutureTask is not finished yet..."); 
} 
long result = futureTask.get(); 
 
threadpool.shutdown();