HOW does it work?

the easiest way is to write a file, is by using the preset class FileWriter

1. create a standard main-program setup
   package File;
   
   public class Write {
   
   	void start () {
   	}
   	
   	public static void main(String[] args) {
   		new Write().start();
   	}
   	
   }

   a small example as this does not necessarily need a constructor

2. import
   1. FileWriter
   2. preset exception class, for example IOException
      import java.io.BufferedWriter;
      import java.io.IOException;

3. create a FileWriter object
   
   in the start method

   void start () {
   	FileWriter writer = new FileWriter(location);
   }

4. If you want to make your code more efficient: import BufferWriter and create a BufferedWriter object
   
   void start() throws IOException {
   	FileWriter writer = new FileWriter(location);
   	BufferedWriter bufferedWriter = new BufferedWriter(writer);
   	bufferedWriter.write(fileContent);
   	bufferedWriter.close();
   }

5. create the value for the variables :
   String fileContent = "HELLOWORLD";
   String location = "/Users/x/Downloads/example.txt";

Program

package File;

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

public class Write {
	String fileContent = "HELLOWORLD";
	String location = "/Users/x/Downloads/example.txt";

	void start() throws IOException {
		FileWriter writer = new FileWriter(location);
		BufferedWriter bufferedWriter = new BufferedWriter(writer);
		bufferedWriter.write(fileContent);
		bufferedWriter.close();
	}

	public static void main(String[] args) throws IOException {
		new Write().start();
	}

}

OUTPUT

Synonym: FILE OUtPUT | BUFFERREADER | FILESTREAM | DISPLay output in FILE