hwo to create a list of 1 to n nums in java list

To create a list of numbers from 1 to n in Java, you can use a loop to iterate over the range of numbers and add each number to the list. Here is an example of how to do this using the ArrayList class:

import java.util.ArrayList;
import java.util.List;

public class Main {
  public static void main(String[] args) {
    int n = 10;
    List<Integer> list = new ArrayList<>();

    for (int i = 1; i <= n; i++) {
      list.add(i);
    }

    System.out.println(list); // Outputs: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
  }
}

In this example, a loop is used to iterate over the range of numbers from 1 to n. The add method of the ArrayList object is called in each iteration to add the current number to the list.

You can also use the List.of method to create a list of numbers in a more concise way:

import java.util.List;

public class Main {
  public static void main(String[] args) {
    int n = 10;
    List<Integer> list = List.of(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);

    System.out.println(list); // Outputs: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
  }
}

In this example, the List.of method is used to create a list of numbers from 1 to 10. The List.of method returns an immutable list, which means that the list cannot be modified after it is created.

You can use a loop or the List.of method to create a list of numbers from 1 to n in Java. The ArrayList class allows you to create a mutable list, while the List.of method returns an immutable list.