Converting List<String> to String[] in Java

Converting List<String> to String[] in Java

To convert a List<String> to a String[] in Java, you can use the toArray() method provided by the List interface. Here's how you can do it:

import java.util.ArrayList; import java.util.List; public class ListToStringArray { public static void main(String[] args) { // Create a List of Strings List<String> stringList = new ArrayList<>(); stringList.add("One"); stringList.add("Two"); stringList.add("Three"); // Convert List to String[] String[] stringArray = stringList.toArray(new String[0]); // Print the elements of the String array for (String str : stringArray) { System.out.println(str); } } }

In this example:

  1. We create a List<String> called stringList and add some strings to it.

  2. To convert the List<String> to a String[], we use the toArray() method. We pass a new String[0] array as an argument to the toArray() method. This tells Java to create a new array of the same type as the elements in the list.

  3. The stringArray now contains the elements of the List<String>, and you can access them as you would with any regular array.

By passing a new array as an argument to toArray(), you let Java determine the size of the resulting array based on the size of the list. If you want to specify a fixed size for the array, you can pass an array of the desired size as an argument instead of new String[0].

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