การกรองตัวเลขขนาดใหญ่

public class NumberFilter {
    public static void main(String[] args) {
        HashSet numbers = new HashSet<>();

        numbers.add(10);
        numbers.add(20);
        numbers.add(30);
        numbers.add(40);
        numbers.add(50);

        // Create a new Iterator object
        Iterator it = numbers.____();
        
        // Check if more elements exist
        while (it.____()) {
        	// Retrieve next element
        	int current = it.____();
            if (current > 25) {
            	// Remove the retrieved element
                it.____();
            }
        }

        System.out.println(numbers);
    }
}