Passing Object references?

[Dillinger4]

Does anyone know how i could go about passing in a reference
to an object? I want to call the static method without creating an instance of this class, so when i call the FileGrabber method
i just have to use the class name. I not sure how i should go about doing this without having to define a constructor for this class. Any suggestions?

import java.io.*;
  
    public class FileGrabber{
     
    private static FileReader fr;
    private static String filepath; 
  
   static void setFileReader(JTextField jtf){ want to pass in reference to a JTextField. 
    try{ // path for file to be encrypted. 

    filepath = jtf.getText();
    fr = new FileReader(filepath); 
    
 
   }catch(IOException e ){System.err.println(e);}
   } 
      
    }