create file java code example

Example 1: writing to a file in java

import java.io.FileWriter;   // Import the FileWriter class
import java.io.IOException;  // Import the IOException class to handle errors

public class WriteToFile {
  public static void main(String[] args) {
    try {
      FileWriter myWriter = new FileWriter("filename.txt");
      myWriter.write("Files in Java might be tricky, but it is fun enough!");
      myWriter.close();
      System.out.println("Successfully wrote to the file.");
    } catch (IOException e) {
      System.out.println("An error occurred.");
      e.printStackTrace();
    }
  }
}

Example 2: Java create new file

// example on createNewFile() method of File class in java
import java.io.File;
import java.io.IOException;
public class CreateFileDemo
{
   public static void main(String[] args) throws IOException
   {
      try
      {
         File file = new File("D:\\demo.txt");
         boolean bool = file.createNewFile();
         if(bool)
         {
            System.out.println("File created successfully");
         }
         else
         {
            System.out.println("File already exists");
         }
      }
      catch(IOException ex)
      {
         System.out.println("Exception : ");
         ex.printStackTrace();
      }
   }
}

Example 3: java create txt file

File myObj = new File("path");
myObj.createNewFile();
FileWriter myWriter = new FileWriter("path");
myWriter.write("text");
myWriter.close();

Example 4: java create file

String fileData = "yourContent";
FileOutputStream fos = new FileOutputStream("yourFile.txt");
fos.write(fileData.getBytes());
fos.flush();
fos.close();

Example 5: java create file

File filename = new File(filepath)

Example 6: write file java

@Test
public void givenUsingJava7_whenWritingToFile_thenCorrect() 
  throws IOException {
    String str = "Hello";
 
    Path path = Paths.get(fileName);
    byte[] strToBytes = str.getBytes();
 
    Files.write(path, strToBytes);
 
    String read = Files.readAllLines(path).get(0);
    assertEquals(str, read);
}