Please Help! My Powerbook is rewriting my programs!

Hello,
I wanted to first say thank you to those of you who answer questions on this forum, and keep this great resource running!
My question involves a problem I've previously had the Genius Bar at my local Apple store look at a few times, although this time it happend it has been less severe so far.
Here's the story....
About 3 months ago my computer had a problem similar to this guy's problem:
http://discussions.apple.com/thread.jspa?threadID=413459
Essentially the dock and the dock icons reset to factory settings, along with all the programs within the dock. I lost my iTunes library, my iCal information, my iPhoto library, bookmarks in Safari and some other things.
I first thought the worst had happened and wiped my hard drive clean, did a clean install and reinstalled all my information off of my backups. I also consulted the Genius Bar after reinstalling everything and they figured this fixed everything too. It did fix the problem for a little while, until disaster struck again, with the same problem happening again.
This time I didn't wipe anything or reinstall anything, I took it straight to the Genius Bar. They decided it was the Hard Drive and replaced it. It's been about a month since they replaced the Hard Drive and things had been going well until I bought a RAM upgrade. I followed Apple's instructions perfectly to upgrade the RAM, replacing the factory 512k with 2 GB. Everything appeared fine once I started the machine up. The "About this Computer" showed, and still shows that I have the 2GB installed. Within the same start-up I opened iTunes and an error message popped up telling me my library was corrupted and that it was labeling it as damaged.
I quickly restarted, and bam! factory dock settings.. I've got the computer running now, because i'm afraid what will happen after further restarts. If I'll lose more and more. I did check all of my programs, and with the exception of iCal, iTunes, and iPhoto. Everything is working fine. I lost the dock icons, but all my information seems to still be there.
Does anyone know how to fix this, or better yet what keeps causing this problem? I'm very interested to find out if others have the same problem.
Any help or insight into this problem would be very appreciated.
Thank you in advance...
Bryan
Powerbook G4 Titanium 1.5 Mac OS X (10.4.6)

Haven't trashed anything
You don't mention whether you might have renamed something (or moved a file/folder needed by the OS). Renaming/moving some files/folders will result in exactly the behavior you've described, but if you haven't done so, you'll have to look elsewhere.
Given that you've replaced the HD, reinstalled the OS from the install discs (not from a backup) and still have the issue, it would seem to narrow down the causes to the following:
-one of your apps is renaming/moving OS files (this is not unheard of).
-the install disc is installing a corrupt OS (not unheard of either, but if the issue started occurring with the original OS that was on the PB when it was new, and the same issue is occurring after reinstalling the OS from your install disc, these are most likely different sources for the OS and would seem to rule out a faulty installation disc).
-faulty RAM.
-faulty logic board.

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E:\raghav>javac BarChart3DDemo2.java
BarChart3DDemo2.java:3: cannot find symbol
symbol : class ChartFactory
location: package org.jfree.chart
import org.jfree.chart.ChartFactory;
^
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symbol : class ChartPanel
location: package org.jfree.chart
import org.jfree.chart.ChartPanel;
^
BarChart3DDemo2.java:5: cannot find symbol
symbol : class JFreeChart
location: package org.jfree.chart
import org.jfree.chart.JFreeChart;
^
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import org.jfree.chart.axis.CategoryAxis;
^
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import org.jfree.chart.axis.CategoryLabelPosition;
^
BarChart3DDemo2.java:8: package org.jfree.chart.axis does not exist
import org.jfree.chart.axis.CategoryLabelPositions;
^
BarChart3DDemo2.java:9: package org.jfree.chart.axis does not exist
import org.jfree.chart.axis.CategoryLabelWidthType;
^
BarChart3DDemo2.java:10: package org.jfree.chart.plot does not exist
import org.jfree.chart.plot.CategoryPlot;
^
BarChart3DDemo2.java:11: package org.jfree.chart.plot does not exist
import org.jfree.chart.plot.PlotOrientation;
^
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import org.jfree.data.category.CategoryDataset;
^
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^
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^
BarChart3DDemo2.java:15: package org.jfree.ui does not exist
import org.jfree.ui.ApplicationFrame;
^
BarChart3DDemo2.java:16: package org.jfree.ui does not exist
import org.jfree.ui.RectangleAnchor;
^
BarChart3DDemo2.java:17: package org.jfree.ui does not exist
import org.jfree.ui.RefineryUtilities;
^
BarChart3DDemo2.java:18: package org.jfree.ui does not exist
import org.jfree.ui.TextAnchor;
^
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import org.jfree.util.Log;
^
BarChart3DDemo2.java:20: package org.jfree.util does not exist
import org.jfree.util.PrintStreamLogTarget;
^
BarChart3DDemo2.java:27: cannot find symbol
symbol: class ApplicationFrame
public class BarChart3DDemo2 extends ApplicationFrame {
^
BarChart3DDemo2.java:80: cannot find symbol
symbol : class CategoryDataset
location: class org.jfree.chart.demo.BarChart3DDemo2
private JFreeChart createChart(final CategoryDataset dataset) {
^
BarChart3DDemo2.java:80: cannot find symbol
symbol : class JFreeChart
location: class org.jfree.chart.demo.BarChart3DDemo2
private JFreeChart createChart(final CategoryDataset dataset) {
^
BarChart3DDemo2.java:50: cannot find symbol
symbol : class DefaultCategoryDataset
location: class org.jfree.chart.demo.BarChart3DDemo2
final DefaultCategoryDataset dataset = new DefaultCategoryDataset();
^
BarChart3DDemo2.java:50: cannot find symbol
symbol : class DefaultCategoryDataset
location: class org.jfree.chart.demo.BarChart3DDemo2
final DefaultCategoryDataset dataset = new DefaultCategoryDataset();
^
BarChart3DDemo2.java:64: cannot find symbol
symbol : class JFreeChart
location: class org.jfree.chart.demo.BarChart3DDemo2
final JFreeChart chart = createChart(dataset);
^
BarChart3DDemo2.java:67: cannot find symbol
symbol : class ChartPanel
location: class org.jfree.chart.demo.BarChart3DDemo2
final ChartPanel chartPanel = new ChartPanel(chart);
^
BarChart3DDemo2.java:67: cannot find symbol
symbol : class ChartPanel
location: class org.jfree.chart.demo.BarChart3DDemo2
final ChartPanel chartPanel = new ChartPanel(chart);
^
BarChart3DDemo2.java:82: cannot find symbol
symbol : class JFreeChart
location: class org.jfree.chart.demo.BarChart3DDemo2
final JFreeChart chart = ChartFactory.createBarChart3D(
^
BarChart3DDemo2.java:87: cannot find symbol
symbol : variable PlotOrientation
location: class org.jfree.chart.demo.BarChart3DDemo2
PlotOrientation.HORIZONTAL, // orientation
^
BarChart3DDemo2.java:82: cannot find symbol
symbol : variable ChartFactory
location: class org.jfree.chart.demo.BarChart3DDemo2
final JFreeChart chart = ChartFactory.createBarChart3D(
^
BarChart3DDemo2.java:93: cannot find symbol
symbol : class CategoryPlot
location: class org.jfree.chart.demo.BarChart3DDemo2
final CategoryPlot plot = chart.getCategoryPlot();
^
BarChart3DDemo2.java:97: cannot find symbol
symbol : class CategoryAxis
location: class org.jfree.chart.demo.BarChart3DDemo2
final CategoryAxis axis = plot.getDomainAxis();
^
BarChart3DDemo2.java:98: cannot find symbol
symbol : class CategoryLabelPositions
location: class org.jfree.chart.demo.BarChart3DDemo2
final CategoryLabelPositions p = axis.getCategoryLabelPositions();
^
BarChart3DDemo2.java:100: cannot find symbol
symbol : class CategoryLabelPosition
location: class org.jfree.chart.demo.BarChart3DDemo2
final CategoryLabelPosition left = new CategoryLabelPosition(
^
BarChart3DDemo2.java:100: cannot find symbol
symbol : class CategoryLabelPosition
location: class org.jfree.chart.demo.BarChart3DDemo2
final CategoryLabelPosition left = new CategoryLabelPosition(
^
BarChart3DDemo2.java:101: cannot find symbol
symbol : variable RectangleAnchor
location: class org.jfree.chart.demo.BarChart3DDemo2
RectangleAnchor.LEFT, TextBlockAnchor.CENTER_LEFT,
^
BarChart3DDemo2.java:101: cannot find symbol
symbol : variable TextBlockAnchor
location: class org.jfree.chart.demo.BarChart3DDemo2
RectangleAnchor.LEFT, TextBlockAnchor.CENTER_LEFT,
^
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symbol : variable TextAnchor
location: class org.jfree.chart.demo.BarChart3DDemo2
TextAnchor.CENTER_LEFT, 0.0,
^
BarChart3DDemo2.java:103: cannot find symbol
symbol : variable CategoryLabelWidthType
location: class org.jfree.chart.demo.BarChart3DDemo2
CategoryLabelWidthType.RANGE, 0.30f
^
BarChart3DDemo2.java:105: cannot find symbol
symbol : variable CategoryLabelPositions
location: class org.jfree.chart.demo.BarChart3DDemo2
axis.setCategoryLabelPositions(CategoryLabelPositions.replaceLeftPosition(p, left));
^
BarChart3DDemo2.java:118: cannot find symbol
symbol : class PrintStreamLogTarget
location: class org.jfree.chart.demo.BarChart3DDemo2
Log.getInstance().addTarget(new PrintStreamLogTarget());
^
BarChart3DDemo2.java:118: cannot find symbol
symbol : variable Log
location: class org.jfree.chart.demo.BarChart3DDemo2
Log.getInstance().addTarget(new PrintStreamLogTarget());
^
BarChart3DDemo2.java:120: cannot find symbol
symbol : method pack()
location: class org.jfree.chart.demo.BarChart3DDemo2
demo.pack();
^
BarChart3DDemo2.java:121: cannot find symbol
symbol : variable RefineryUtilities
location: class org.jfree.chart.demo.BarChart3DDemo2
RefineryUtilities.centerFrameOnScreen(demo);
^
BarChart3DDemo2.java:122: cannot find symbol
symbol : method setVisible(boolean)
location: class org.jfree.chart.demo.BarChart3DDemo2
demo.setVisible(true);
^
44 errors

Runtime Exception.... NOOB JAVA PROGRAMMMER HERE. PLEASE HELP!

Hey Oracle ppl,
I'm a real n00b Java programmer, just learning Java through SL-275-SE6. So, here's a small program that I created, but I get this runtime exception while running it in NetBeans v7.1:
java.sql.SQLException: [Microsoft][ODBC Microsoft Access Driver] Too few parameters. Expected 1.
Here's the source code:
import java.io.*;
import java.sql.*;
public class Expenses {
void DataBaseInteract() {
try {
Connection con;
Statement st;
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
con = DriverManager.getConnection("jdbc:odbc:Expenses");
st = con.createStatement();
st.execute("create table Expenses(DateofTransaction String, Amount float, Remarks String)");
DataInputStream in1 = new DataInputStream(System.in);
System.out.println("Enter today's date, in the format DD/MM/YYYY.");
String DateofTransaction = (in1.readLine());
System.out.println("Enter today's transaction amount, ");
float Amount = Float.parseFloat(in1.readLine());
System.out.println("Enter remarks, if any:");
String Remarks = (in1.readLine());
st.executeUpdate("insert into Expenses values("+DateofTransaction+", "+Amount+", "+Remarks+")");
con.close();
catch(Exception e) {
System.out.println(e);
public static void main(String[] args) throws Exception {
Expenses obj = new Expenses();
obj.DataBaseInteract();
Please help! I really want this program up and running!!!

better you can get help from http://forums.netbeans.org/
eventhough.
here some inputs,
http://www.justskins.com/forums/too-few-parameters-expected-80937.html

Should I synchronize ? Please help

Hello,
Following is the scenario . Do I need to synchronize? If yes, how do I do that??
Sample code
class Object1
HashMap m = new HashMap();
Object2.sethash(m) //is a object ,adds keys/val to HashMap
m = Object2.getHash()//returns the Hash
if ( condition)
{ Object3.setHash(m)//is a object ,adds keys/val to HashMap
m=Object3.getHash()()//returns the Hash
else
Object4.setHash(m)//is a object ,adds keys/val to HashMap
m=Object4.getHash();//returns the Hash
Object5.setHash(m);
Object5.printput();//prints the contents of Hash to a file
Hope its clear.Should i synchronize?? If uyes, How can I do it using what object?
Please help
Thanks

all depends what driving the program...
you need to think "is it possible for 2 threads to acces this Hashmap at the same time?"
ok, so whats a thread, well you can make your own threads and set em running, if any 2 instances of any thread acces a Hashmap then (unless you have some other mechanism to "synchronize" them) then you really should synchronize
another way you can experience threads is if your program uses GUI for user input.. every event (click or key press) triggers a thread, if these actions acces a Hashmap, then you need to synchronize
note that not all accesses need to be synchronized, if you only ever read from the Hashmap, then you dont need it, but if at any time any thread modifies its structure then if you dont synchronize (even the read methods) you are asking for problems
the simplest way to synchronize is...synchronize(theHashmap){
... //block of code that accesses or modifies theHashmap
}

Please Help! My Powerbook is rewriting my programs!

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