Does making more classes or incapsulation effect perfoemance?

I have a Frame with a TabbedPane on it. There are 8 tabs. Each tab contains a JTable with lots of fields & 4 buttons.
When I design all this stuff in JBuilder all panels are put into one class (...Frame class). I want to put every tab's JPanel into a separate class (... JPanel class). But some say that it might decrease otherall performance. It's sounds like a nonsense to me. But I'm not experienced programmer. And I'd like to make it clear for myself.
One more thing. If I'm setting all class fields private & then write get/set, is the field access slower in this case than if I'm making all fields public?
Can anyone help me? Does anyone know what does really decrease perfomance & what does not?

...but some say that it might decrease otherall performance
Having more classes does increase the time it takes a program to run because of the additional class loading activity. Deciding whether to create another class is one of the toughest things in o-o design, and it rests on whether the extra load time is worth it for readability and reusability. The overall impact is not that large if you are talking about five or ten classes.
If I'm setting all class fields private & then write get/set, is the field access slower in this case than if I'm making all fields public?
Yes it is, but it is pretty negligible, especially if you are just returning a value. The real advantage of get/set is to allow for additional processing to take place when a property is modified or queried.
Mitch Goldstein
Author, Hardcore JFC (Cambridge Univ Press)
[email protected]

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Distributed Database Consulting, Inc.
http://www.ddbcinc.com/askDDBC

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I have used After Effects in school but now that I am using FCP instead of AVID I was thinking that it'd probably be a good idea to switch over.
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Does making final field static improve performance or save memory?

Are final fields given value at compile time by the compiler?
private final String FINAL_FIELD = "31";
Does making final field static improve performance or save memory?

Actually it's final static fields with primitive or String type that are treated specially. For other final fields only extra compile time checking is produced, they are the same at run time.
final static primitives are treated as compiler constants, and a literal value is substituted. No actual field is created.
Myself I consider an awareness of Java internals valuable. For example, if you were unaware of the above the occasional misbehaviour of final static primitives referenced in other classes would be baffling. If your code references a final static primitive from another class it's compiled as a literal, not a reference, so if their value changes in the other class, the referring class will retain the old value if not re-compiled.

Does making objects equal null help the gc handle memory leakage problems

hi all,
does making objects equal null help the gc handle memory leakage problems ?
does that help out the gc to collect unwanted objects ??
and how can I free memory avoid memory leakage problems on devices ??
best regards,
Message was edited by:
happy_life

Comments inlined:
does making objects equal null help the gc handle
memory leakage problems ?To an extent yes. During the mark phase it will be easier for the GC to identify the nullified objects on the heap while doing reference analysis.
does that help out the gc to collect unwanted objects
??Same answer as earlier, Eventhough you nullify the object you cannot eliminate the reference analysis phase of GC which definitelely would take some time.
and how can I free memory avoid memory leakage
problems on devices ??There is nothing like soft/weak reference stuffs that you get in J2SE as far as J2ME is concerned with. Also, user is not allowed to control GC behavior. Even if you use System.gc() call you are never sure when it would trigger the GC thread. Kindly as far as possible do not create new object instances or try to reuse the instantiated objects.
~Mohan

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I have a custom SharePoint 2010 solution that includes an aspx page. The aspx page in is in the /layouts folder within the solution and I created it by just adding an application page to the solution. I am trying to create a parent-child relationship between
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<%@ Assembly Name="$SharePoint.Project.AssemblyFullName$" %>
<%@ Import Namespace="Microsoft.SharePoint.ApplicationPages" %>
<%@ Register Tagprefix="SharePoint" Namespace="Microsoft.SharePoint.WebControls" Assembly="Microsoft.SharePoint, Version=14.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %>
<%@ Register Tagprefix="Utilities" Namespace="Microsoft.SharePoint.Utilities" Assembly="Microsoft.SharePoint, Version=14.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %>
<%@ Register Tagprefix="asp" Namespace="System.Web.UI" Assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" %>
<%@ Import Namespace="Microsoft.SharePoint" %>
<%@ Assembly Name="Microsoft.Web.CommandUI, Version=14.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %>
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="processingpage.aspx.cs" Inherits="MY.Solution.Layouts.MY.Solution.processingpage" MasterPageFile="~/_layouts/application.master" %>
<asp:Content ID="PageHead" ContentPlaceHolderID="PlaceHolderAdditionalPageHead" runat="server">
</asp:Content>
<asp:Content ID="Main" ContentPlaceHolderID="PlaceHolderMain" runat="server">
</asp:Content>
<asp:Content ID="PageTitle" ContentPlaceHolderID="PlaceHolderPageTitle" runat="server"> Processing Page </asp:Content>
<asp:Content ID="PageTitleInTitleArea" ContentPlaceHolderID="PlaceHolderPageTitleInTitleArea" runat="server" > Processing Page </asp:Content>
The code behind is as follows:
using System;
using Microsoft.SharePoint;
using Microsoft.SharePoint.Administration;
using Microsoft.SharePoint.WebControls;
using Microsoft.SharePoint.Utilities;
using System.Reflection;
namespace MY.Solution.Layouts.MY.Solution
public partial class processingpage : LayoutsPageBase
protected void Page_Load(object sender, EventArgs e)
try
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SPListItem thisItem = thisList.GetItemById(int.Parse(Request.QueryString["ID"]));
sContentType = thisItem["ContentType"].ToString();
sContentTypeID = thisItem.ContentTypeId.ToString();
if (sContentType == "Some Content Type")
sContentTypeID = "";
sAIID = thisItem["ID"].ToString();
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Context.Response.Redirect(oWeb.Url + "/Lists/Blist" + "/NewForm.aspx?AIID=" + sAIAuditID.ToString() + "&ContentTypeId=" + sContentTypeID + "&ParentItemID" + Context.Request["ID"]);
else if (sContentType == "Some Content Type")
sContentTypeID = "";
sAIID = thisItem["AIID"].ToString();
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else if (sContentType == "Some Content Type")
sContentTypeID = "";
sAICID = thisItem["AICID"].ToString();
//Redirect to newform.aspx with the Appropriate parameters.
Context.Response.Redirect(oWeb.Url + "/Lists/CList" + "/NewForm.aspx?AICID=" + sAICID.ToString() + "&ContentTypeId=" + sContentTypeID + "&ParentItemID" + Context.Request["ID"]);
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LoggingService.LogError("MY.Solution - Processing Page", "No Applicable Content Type Found.");
catch (Exception ex)
LoggingService.LogError("My.Solution - Processing Page", ex.Message);
finally
//DO SOME FINAL THINGS HERE WHEN REQUIRED.
In the page I need to use Request.QueryString to get the values from the URL. But when I deploy the solution and load the page I get the error:
'MY.Solution.Layouts.MY.Solution.processingpage' is not allowed here because it does not extend class 'System.Web.UI.Page'.
When I change the line:
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="processingpage.aspx.cs" Inherits="MY.Solution.Layouts.MY.Solution.processingpage" MasterPageFile="~/_layouts/application.master" %>
to inherit as follows:
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="processingpage.aspx.cs" Inherits="Microsoft.SharePoint.WebControls.LayoutsPageBase" MasterPageFile="~/_layouts/application.master" %>
it does not work either.
If I change it to inherit like below:
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="processingpage.aspx.cs" Inherits="System.Web.UI.Page" MasterPageFile="~/_layouts/application.master" %>
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@NadeemYousuf I have tried this too and it didn't work.
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http://forum.java.sun.com/thread.jspa?threadID=5181153&messageID=9705196#9705196
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I'd start with paper and pencil and see what conflicts might arise.

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[http://forum.java.sun.com/thread.jspa?threadID=5283461]
[http://forum.java.sun.com/thread.jspa?threadID=5283412]
[http://forum.java.sun.com/thread.jspa?threadID=5279385]

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Why does the main class cannot find symbol symbol : constructor Car(double) location:
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Hi experts,
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how to stop making archieve while refreshing the Materialised view.
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how to stop making archieve while refreshing the Materialised view.
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Does making more classes or incapsulation effect perfoemance?

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