How to create a Set of Numbers from 1 to N in Java - Step by Step Examples

How to create a Set of Numbers from 1 to N in Java ?

Answer

To create a set of numbers from 1 to N in Java, you can use a loop to add each number to a Set implementation such as HashSet.


✐ Examples

1 Create Set of Numbers from 1 to 5

In this example,

  1. We import the required Java classes for Set and HashSet.
  2. We initialize a HashSet named numberSet to store the numbers.
  3. We use a for loop to iterate from 1 to 5 (inclusive).
  4. Inside the loop, we add each number to the set using the add method.
  5. The resulting set contains numbers from 1 to 5.

Java Program

import java.util.HashSet;
import java.util.Set;

public class NumberSetExample {
    public static void main(String[] args) {
        Set<Integer> numberSet = new HashSet<>();

        for (int i = 1; i <= 5; i++) {
            numberSet.add(i);
        }

        System.out.println("Set of numbers from 1 to 5: " + numberSet);
    }
}

Output

Set of numbers from 1 to 5: [1, 2, 3, 4, 5]

2 Create Set of Numbers from 1 to 10

In this example,

  1. We import the required Java classes for Set and HashSet.
  2. We initialize a HashSet named numberSet to store the numbers.
  3. We use a for loop to iterate from 1 to 10 (inclusive).
  4. Inside the loop, we add each number to the set using the add method.
  5. The resulting set contains numbers from 1 to 10.

Java Program

import java.util.HashSet;
import java.util.Set;

public class NumberSetExample {
    public static void main(String[] args) {
        Set<Integer> numberSet = new HashSet<>();

        for (int i = 1; i <= 10; i++) {
            numberSet.add(i);
        }

        System.out.println("Set of numbers from 1 to 10: " + numberSet);
    }
}

Output

Set of numbers from 1 to 10: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]

Summary

In this tutorial, we learned How to create a Set of Numbers from 1 to N in Java language with well detailed examples.


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