How might I convert an ArrayList object to a String[] array in Java?

on

 

You can convert an ArrayList<String> object to a String[] array in Java using the toArray() method of the ArrayList class. Here's how you can do it:

java
import java.util.ArrayList;
import java.util.Arrays;

public class ArrayListToStringArrayExample {

    public static void main(String[] args) {
        ArrayList<String> arrayList = new ArrayList<>();
        arrayList.add("Hello");
        arrayList.add("World");
        arrayList.add("Java");

        String[] stringArray = arrayList.toArray(new String[0]);

        System.out.println("Converted String Array: " + Arrays.toString(stringArray));
    }
}

In this example:

  • We create an ArrayList called arrayList containing some strings.
  • We use the toArray() method of the ArrayList class to convert it to a String[] array.
  • We provide an empty String array as an argument to the toArray() method. The type and length of this array will be used to create the resulting String[] array.

The stringArray will now hold the same elements as the ArrayList, and you can manipulate it as a regular array.

Please note that the resulting String[] array is a new array, separate from the original ArrayList. Any modifications to the stringArray will not affect the original ArrayList.

Comments

Post a Comment