FileLoader.java

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
public class FileLoader{
    public static Object loadData(File inputFile){
        Object returnValue = null;
        try{
            if (inputFile.exists()){
                if (inputFile.isFile()){
                    ObjectInputStream readIn = new ObjectInputStream(new FileInputStream(inputFile));
                    returnValue = readIn.readObject();
                    readIn.close();
                }
                else {
                    System.err.println(inputFile + " is a directory.");
                }
            }
            else {
                System.err.println("File " + inputFile + " does not exist.");
            }
        }
        catch (ClassNotFoundException exc){
            exc.printStackTrace();
            
        }
        catch (IOException exc){
            exc.printStackTrace();
            
        }
        return returnValue;
    }
    public static void storeData(File outputFile, Serializable data){
        try{
            ObjectOutputStream writeOut = new ObjectOutputStream(new FileOutputStream(outputFile));
            writeOut.writeObject(data);
            writeOut.close();
        }
        catch (IOException exc){
            exc.printStackTrace();
        }
    }
}