Вот несколько методов, которые можно использовать в Java для записи в файл:

1. Использование класса FileWriter:

   import java.io.FileWriter;
   import java.io.IOException;
   public class FileWriteExample {
      public static void main(String[] args) {
          String data = "Hello, World!";
          try {
              FileWriter writer = new FileWriter("output.txt");
              writer.write(data);
              writer.close();
              System.out.println("Data has been written to the file.");
          } catch (IOException e) {
              System.out.println("An error occurred.");
              e.printStackTrace();
          }
      }
   }

2. Использование класса BufferedWriter:

   import java.io.BufferedWriter;
   import java.io.FileWriter;
   import java.io.IOException;
   public class BufferedWriterExample {
      public static void main(String[] args) {
          String data = "Hello, World!";
          try {
              BufferedWriter writer = new BufferedWriter(new FileWriter("output.txt"));
              writer.write(data);
              writer.close();
              System.out.println("Data has been written to the file.");
          } catch (IOException e) {
              System.out.println("An error occurred.");
              e.printStackTrace();
          }
      }
   }

3. Использование класса PrintWriter:

   import java.io.FileWriter;
   import java.io.IOException;
   import java.io.PrintWriter;
   public class PrintWriterExample {
      public static void main(String[] args) {
          String data = "Hello, World!";
          try {
              PrintWriter writer = new PrintWriter(new FileWriter("output.txt"));
              writer.println(data);
              writer.close();
              System.out.println("Data has been written to the file.");
          } catch (IOException e) {
              System.out.println("An error occurred.");
              e.printStackTrace();
          }
      }
   }

4. Использование класса Files (Java 7+):

   import java.io.IOException;
   import java.nio.file.Files;
   import java.nio.file.Path;
   import java.nio.file.StandardOpenOption;
   public class FilesWriteExample {
      public static void main(String[] args) {
          String data = "Hello, World!";
          try {
              Path path = Path.of("output.txt");
              Files.writeString(path, data, StandardOpenOption.CREATE);
              System.out.println("Data has been written to the file.");
          } catch (IOException e) {
              System.out.println("An error occurred.");
              e.printStackTrace();
          }
      }
   }

5. Использование FileOutputStream:

   import java.io.FileOutputStream;
   import java.io.IOException;
   public class FileOutputStreamExample {
      public static void main(String[] args) {
          String data = "Hello, World!";
          try {
              FileOutputStream fos = new FileOutputStream("output.txt");
              byte[] bytes = data.getBytes();
              fos.write(bytes);
              fos.close();
              System.out.println("Data has been written to the file.");
          } catch (IOException e) {
              System.out.println("An error occurred.");
              e.printStackTrace();
          }
      }
   }