JSON stands for JavaScript Object Notation. It is one of the widely used formats for exchanging data through web applications. JSON arrays are almost the same as arrays in JavaScript. They can be understood as a collection of indexed data (strings, numbers, Boolean values). Given a JSON array, we will discuss how to convert it to a String array in Java.

Creating a JSON array

Let's start by creating a JSON array in Java. Here, we will use some sample data to input into the array, but you can use the data as needed.

1. Defining the array

JSONArray exampleArray = new JSONArray();

Please note that we will import the org.json package to use this command. This will be discussed in the code later.

2. Inserting data into the array

We now add some example data into the array.

exampleArray.put("Geeks ");
exampleArray.put("For ");
exampleArray.put("Geeks ");

Note the spaces given after each string. This is done because when we convert it to a String array, we want to make sure that there is space between each element.

List exampleList = new ArrayList();

2. Adding JSON array data into the List

We can loop through the JSON array to feature all elements to our List.

for(int i=0; i< exampleArray.length; i++){
    exampleList.add(exampleArray.getString(i));
}

int size = exampleList.size();
String[] stringArray = exampleList.toArray(new String[size]);

// importing the packages
import java.util.*;
import org.json.*;

public class GFG {

	public static void main(String[] args)
	{
		// Initialising a JSON example array
		JSONArray exampleArray = new JSONArray();

		// Entering the data into the array
		exampleArray.put("Geeks ");
		exampleArray.put("For ");
		exampleArray.put("Geeks ");

		// Printing the contents of JSON example array
		System.out.print("Given JSON array: "
						+ exampleArray);
		System.out.print("\n");

		// Creating example List and adding the data to it
		List exampleList = new ArrayList();
		for (int i = 0; i < exampleArray.length; i++) {
			exampleList.add(exampleArray.getString(i));
		}

		// Creating String array as our
		// final required output
		int size = exampleList.size();
		String[] stringArray
			= exampleList.toArray(new String[size]);

		// Printing the contents of String array
		System.out.print("Output String array will be : ");
		for (String s : stringArray) {
			System.out.print(s);
		}
	}
}

Output:

Given JSON array: ["Geeks ","For ","Geeks "]
Output String array will be : Geeks For Geeks