Archief - BlueJ object wegschrijven

import java.io.*;        
import java.io.IOException;             
import java.io.ObjectOutputStream;      
import java.util.NoSuchElementException;
import java.util.Scanner;
import java.util.ArrayList;   
public class ObjectWriter
{
    private ObjectOutputStream output;
    private Database database;
    public ObjectWriter(Database database)
    {
        this.database=database;
    }
    public void openFile()
    {
        try
        {
            output = new ObjectOutputStream(new FileOutputStream("databaseDVDs.ser" ));
        }
        catch(IOException ioException)
        {
            System.out.println("zo werkt dat niet he!");
        }
    }
    public void addRecords(Database dataBase)
    {
        Database record;
        if(dataBase == null)
        {
            record = database;
        }
        else
        {
            record = dataBase;
        }
        Scanner input = new Scanner( System.in);
        try
        {
            output.writeObject( record );
        }
        catch(IOException ioException)
        {
            System.out.println("ERROR!!!");
            return;
        }
        catch(NoSuchElementException elementExcepetion)
        {
            System.out.println("Nein nein nein!");
        }
    }
    public void closeFile()
    {
        try
        {
            if(output != null)
            {
                output.close();
            }
        }
        catch(IOException ioException)
        {
            System.out.println("Error closing file.");
            System.exit(1);
        }
    }
}

import java.io.EOFException;
import java.io.FileInputStream;       
import java.io.IOException;                               
import java.io.ObjectInputStream;
import java.util.ArrayList;
public class ReadObject
{
    private ObjectInputStream input;
    public ReadObject()
    {
    }
    public void openFile()
    {
        try
        {
            input = new ObjectInputStream(new FileInputStream("databaseDVDs.ser"));
        }
        catch(IOException ioException)
        {
            System.out.println("ERROR!!!");
        }
    }
    public Database readRecords()
    {
        Database record = null;
        try
        {
                record = (Database) input.readObject();
        }
        catch ( EOFException endOfFileException )
        {
            System.out.println("Nieje");
        } // end catch
        catch ( ClassNotFoundException classNotFoundException )
        {
            System.out.println( "Unable to create object." );
        } // end catch
        catch ( IOException ioException )
        {
            System.out.println("Error during read from file");
        }
        return record;
    }
    public void closeFile()
    {
        try
        {
            if( input != null)
            input.close();
        }
        catch ( IOException ioException )
        {
            System.out.println( "Error closing file." );
            System.exit( 1 );
        }
    }
}

try {
 output.writeObject(record);
} catch (IOException ex) {
 System.out.println(ex.getMessage());
//of
 ex.printStackTrace();
}