Как передать переменную из одного метода в другой?

import java.io.*;
public class Files
{
 public static PrintWriter openFileToWrite()
    {
        FileOutputStream outputStream;
        PrintWriter printWriter = null;
        String text;
        String fileName;
        
        System.out.println("Please write the file name to edit it:");
        fileName = Genio.getString();
        try{
            outputStream = new FileOutputStream(fileName);
            printWriter = new PrintWriter(outputStream);
            System.out.println("Please input the text that you want to edit to the text file:");
            text = Genio.getString();
            while (!text.equals(""))
            {
                printWriter.println(text);
                text = Genio.getString();
            }
            printWriter.close();
 
        }
        catch(IOException e)
        {
            System.out.println("Error when loading file");
        }
        return printWriter;
    }
    
    /**
     *Metod, that takes function of writing to file.
     *
     */
    public void wriiiiiter()
    {
      
          while (!fileName.equals(""))
         {
          PrintWriter printWriter = openFileToWrite();
         }
    }
}

public class Files
{
private String fileName;
 public static PrintWriter openFileToWrite()
    {
.....
this.fileName = Genio.getString();

public class Globals {
public static final int ANSWER = 42;
public static String name = "Vasya Pupkin";
}
System.out.println(Globals.ANSWER); 
 
public interface GlobalsInterface {
String HELLO_STRING = "Hello World!";
}
System.out.println(GlobalsInterface.HELLO_STRING);

public class Globals {
public static final int ANSWER = 42;
}

public class Globals {
public static String name = "Vasya Pupkin";
}

public interface GlobalsInterface {
   String HELLO_STRING = "Hello World!";
}