EOFException when reading file from storage (cn1)

Question

I have made an externalizable object - User. It works fine when writing to and reading it from storage except if I exit the app and reopen it. Then this error occurs:

java.io.EOFException at java.io.DataInputStream.readFully(DataInputStream.java:197) at java.io.DataInputStream.readUTF(DataInputStream.java:609) at java.io.DataInputStream.readUTF(DataInputStream.java:564) at com.codename1.io.Util.readUTF(Util.java:962)

I have registered the class as follows in the stateMachine:

@Override
    protected void initVars(Resources res) {
        Util.register("User", User.class);
}

This is the class:

package userclasses;

import com.codename1.io.Externalizable;
import com.codename1.io.Util;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.util.Date;

/**
 *
 * 
 */
public class User implements Externalizable {

    private static final int VERSION = 1;

    public int userID;
    public String username;
    public String password;
    public String firstname;
    public String surname;
    public String email;
    public Date registerDate;
    public boolean paidUser;
    public double runStep;
    public double walkStep;



    public User(){
    }

    @Override
    public int getVersion() {
        return VERSION;

    }

    @Override
    public void externalize(DataOutputStream out) throws IOException {
        out.write(userID);
        Util.writeUTF(username, out);
        Util.writeUTF(password, out);
        Util.writeUTF(firstname, out);
        Util.writeUTF(surname, out);
        Util.writeUTF(email, out);
        out.writeLong(registerDate.getTime());
        out.writeBoolean(paidUser);
        out.writeDouble(runStep);
        out.writeDouble(walkStep);

    }

    @Override
    public void internalize(int version, DataInputStream in) throws      IOException {
        userID = in.readInt();
        username = Util.readUTF(in);
        password = Util.readUTF(in);
        firstname = Util.readUTF(in);
        surname = Util.readUTF(in);
        email = Util.readUTF(in);
        registerDate = new Date(in.readLong());
        paidUser = in.readBoolean();
        runStep = in.readDouble();
        walkStep = in.readDouble();

    }

    @Override
    public String getObjectId() {
        return "User";
    }    
}

Shai Almog Shai Almog · Accepted Answer · 2016-07-07T03:53:27

Replace:

out.write(userID);

With:

out.writeInt(userID);

The default write method is the equivalent of writeByte.

EOFException when reading file from storage (cn1)

1 Answers