[doni49]

I'm trying to add my data to the Persistent store. When I run my app in the Simulator, I get JVM errors on the device.

But when I comment out the line that is marked in RED, I get no errors. Can someone PLEASE help me figure out why this isn't working?

TIA!

import java.util.Vector;
import java.lang.String;
import net.rim.device.api.ui.*;
import net.rim.device.api.ui.component.*;
import net.rim.device.api.ui.container.*;
import net.rim.device.api.ui.MenuItem;
import net.rim.device.api.system.*;
import net.rim.device.api.system.PersistentObject;
import net.rim.device.api.system.PersistentStore;

class Transaction{
	public Transaction(int ID, int Type, int Category, String Payee, double Amount){
		_id = ID;
		_type = Type;
		_category = Category;
		_payee = Payee;
		_amount = Amount;
	}
	public int getID(){
		return _id;
	}
	public int getType (){
		return _type;
	}
	public void setType(int Type){
		_type = Type;
	}
	public int getCategory(){
		return _category;
	}
	public void setCategory(int Category){
		_category = Category;
	}
	public String getPayee(){
		return _payee;
	}
	public void setPayee(String payee){
		_payee = payee;
	}
	public double getAmount(){
		return _amount;
	}
	public void setAmount(double amount){
		_amount = amount;
	}
	
	private int _id;
	private int _type;
	private int _category;
	private String _payee;
	private double _amount;
}
class CashBoxApp extends UiApplication
{
    static Vector Transactions;
    static PersistentObject persistTransactions;
    {
        Transactions = (Vector) persistTransactions.getContents();
        if( Transactions == null ) {
            Transactions = new Vector();
            persistTransactions.setContents( Transactions );
            persistTransactions.commit();
        }
    }
    static void addTransaction(Transaction a){
        Transactions.addElement(a);
        persistTransactions.commit();
    }
    public static void main(String[] args){
		
	addTransaction(new Transaction(1, 1, 2, "Dr. T - 1", 25.55));

	CashBoxApp app = new CashBoxApp();
        app.enterEventDispatcher();
    }
    CashBoxApp(){
        // Build the screen.    	
        MainScreen AcctListScreen = new MainScreen();
        pushScreen(AcctListScreen);
    }
}

[Dougsg38p]

What is the error?

[doni49]

JVM Error 104Uncaught: Error

[doni49]

The page also shows a "Continue" option and when I click the trackball, the app closes and a dialog pops up that says "Uncaught Excption: java.lang.Error".

[hrbuckley]

Well, according to the API documentation you should have code similar to this:

static long idKey = <unique long value that identifes the store>;

static PersistentObject store;
static {
    store = PersistentStore.getPersistentObject( idKey ); 
}

to initialize your PersistentObject.

[doni49]

Thanks. But I still get the same errors.
I changed the code as follows only the changed portion is listed):
Old

    static Vector Transactions;
    static PersistentObject persistTransactions;
    {
        Transactions = (Vector) persistTransactions.getContents();
        if( Transactions == null ) {
            Transactions = new Vector();
            persistTransactions.setContents( Transactions );
            persistTransactions.commit();
        }
    }

New

    static long KEY =  0xa3b3159378f59a29L;
    static PersistentObject persistTransactions;
    {
        long KEY =  0xa3b3159378f59a29L;
        persistTransactions = PersistentStore.getPersistentObject( KEY );
        Transactions = (Vector) persistTransactions.getContents();
        if( Transactions == null ) {
            Transactions = new Vector();
            persistTransactions.setContents( Transactions );
            persistTransactions.commit();
        }
    }

Edit: I tried removing the BLUE portion and adding the PURPLE portion--both are shown in the their respective locations. I still get the same errors.

[doni49]

I've continued to try and figure out what's wrong. It seems to be having trouble storing the Category object. As written, I'm creating a Vector of Transactions and then attempting to store the Vector.

When I changed it to a Vector of STRINGS, it gave no errors.

So then I created a new EXTREMELY SIMPLE class and tried persisting a Vector of this new class.

Here's the new class:

class Test implements Persistable{
	boolean _tst;
	public Test(boolean TST){
		_tst = TST;
	}
}

Here's my new test code. I thought I could persist a Vector of custom objects.

import java.util.Vector;
import java.lang.String;
import net.rim.device.api.ui.*;
import net.rim.device.api.ui.component.*;
import net.rim.device.api.ui.container.*;
import net.rim.device.api.ui.MenuItem;
import net.rim.device.api.system.*;
import net.rim.device.api.util.Persistable;
import net.rim.device.api.system.PersistentObject;
import net.rim.device.api.system.PersistentStore;

class Test implements Persistable{
	boolean _tst;
	public Test(boolean TST){
		_tst = TST;
	}
}
class CashBoxApp extends UiApplication
{
	static Vector Transactions;
    long KEY =  0xa3b3159378f59a29L;

    static PersistentObject persistTransactions;
    {
        persistTransactions = PersistentStore.getPersistentObject( KEY );
        Transactions = (Vector) persistTransactions.getContents();
        if( Transactions == null ) {
            Transactions = new Vector();
            persistTransactions.setContents( Transactions );
            persistTransactions.commit();
        }
    }
    static void addTransaction(Test a){
        Transactions.addElement(a);
        persistTransactions.commit();
    }
    public static void main(String[] args){
		
	addTransaction(new Test(true));

	CashBoxApp app = new CashBoxApp();
        app.enterEventDispatcher();
    }
    CashBoxApp(){
        // Build the screen.    	
        MainScreen AcctListScreen = new MainScreen();
        pushScreen(AcctListScreen);
    }
}

Edit: My comment about thinking that I could Persist custom objects got me to thinking that I had read something about "Persistable" so I did some checking and added the portion that's in RED above--STILL get teh same errors.

[doni49]

SOLVED! Thanks all for the assistance.

Come to find out it WAS the "implements Persistable" issue--but in an effort to clean eliminate extraneous code (thinking that maybe something in a diff portion of my code was causing this), I got over-zealous and removed too much. Some of what I had removed was causing null pointers.

Now that I've restored my code and added the "implements Persistable" code, it all runs without errors.

My head hurts!