Filtering large numbers
In many applications, filtering data is an essential step in processing large datasets. For example, in financial applications, age-restricted platforms, or performance tracking systems, you may need to remove values above a certain threshold. In this exercise, you will practice using an Iterator to traverse a collection and remove numbers greater than 25, ensuring it has only relevant values.
All the necessary classes from java.util have been imported for you.
Este exercício faz parte do curso
Input/Output and Streams in Java
Instruções do exercício
- Create an
Iteratorfor the created setnumbers. - Use a
whileloop to check if the setnumbershas more elements. - Retrieve the next element and assign to a new variable
current. - If the number is greater than 25, remove it.
Exercício interativo prático
Experimente este exercício completando este código de exemplo.
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);
}
}