How to store the contents of arrays in a file using Java?

You can use write data into a file using the Writer classes. In the example given below, we are writing the contents of the array using the BufferedWriter.

Example

import java.io.BufferedWriter;
import java.io.FileWriter;

public class WritingStringArrayToFile {
   public static void main(String args[]) throws Exception {
      String[] myArray = {"JavaFX", "HBase", "OpenCV", "Java", "Hadoop", "Neo4j"};
      BufferedWriter writer = new BufferedWriter(new FileWriter("myFile.txt", false));
      for(int i = 0; i < myArray.length; i++) {
         writer.write(myArray[i].toString());
         writer.newLine();
      }
      writer.flush();
      System.out.println("Data Entered in to the file successfully");
   }
}

Output

Data Entered in to the file successfully

If you verify the file you can observe that the file with the contents of an array −

Example

import java.io.BufferedWriter;
import java.io.FileWriter;

public class WritingIntArrayToFile {
   public static void main(String args[]) throws Exception {
      Integer[] myArray = {23, 93, 56, 92, 39};
      BufferedWriter writer = new BufferedWriter(new FileWriter("myFile.txt", false));
      for(int i = 0; i < myArray.length; i++) {
         writer.write(myArray[i].toString());
         writer.newLine();
      }
      writer.flush();
      System.out.println("Data Entered in to the file successfully");
   }
}

Output

Data Entered in to the file successfully

If you verify the file you can observe that the file with the contents of an array −