Tuesday, April 19, 2011

AQT : Processing error at sql_setvars

After installing AQT in my PC I was not able to run it. After login to DB2 server whenever I used to press SQL to open an SQL window, I used to get below mentioned error. 

Error :
Processing error at sql_setvars
Component 'TABCTL32.OCX' or one of its dependencies not correctly registered: a file is missing or invalid

What I did is I downloaded the file TABCTL32.OCX from the below mentioned URL

And added the file TABCTL32.OCX to the path C:\WINXP\system32\TABCTL32.OCX

and run the bat file C:\Program Files\Advanced Query Tool\ocx_register_v8.bat

and after restarting AQT, it was working fine. I wanted to share this issue with you If anyone else faced this kind of similar issue, hope it may helped you.

Friday, April 15, 2011

Java : Methods with Variable Argument Lists (var-args)

Methods with Variable Argument Lists (var-args)

As of 5.0, Java allows you to create methods that can take a variable number of arguments. Depending on where you look, you might hear this capability referred to as "variable-length argument lists," "variable arguments," "var-args," "varargs, "variable arity parameter". They're all the same thing.

As a bit of background,to use the terms "argument" and "parameter".

arguments The things you specify between the parentheses when you'reinvoking a method:

doStuff("a", 2);   // invoking doStuff, so a & 2 are arguments

parameters The things in the method's signature that indicate what the method must receive when it's invoked:

void doStuff(String s, int a) { } // we're expecting two
                                            // parameters: String and int

The declaration rules for var-args:

Var-arg type When you declare a var-arg parameter, you must specify the type of the argument(s) this parameter of your method can receive. (This can be a primitive type or an object type.)

Basic syntax To declare a method using a var-arg parameter, you follow the type with an ellipsis (...), a space, and then the name of the array that will hold the parameters received.

Other parameters It's legal to have other parameters in a method that uses a var-arg.

Var-args limits The var-arg must be the last parameter in the method's signature, and you can have only one var-arg in a method.

Let's look at some legal and illegal var-arg declarations:

void doStuff(int... x) { }  // expects from 0 to many ints
                                    // as parameters
void doStuff2(char c, int... x) { }  // expects first a char,
                                                 // then 0 to many ints
void doStuff3(Animal... animal) { }  // 0 to many Animals

void doStuff4(int x...) { } // bad syntax
void doStuff5(int... x, char... y) { } // too many var-args
void doStuff6(String... s, byte b) { } // var-arg must be last


As of Java 5, methods can declare a parameter that accepts from zero to many arguments, a so-called var-arg method.

A var-arg parameter is declared with the syntax type... name; 

for instance: 
doStuff(int... x) { }

A var-arg method can have only one var-arg parameter.

In methods with normal parameters and a var-arg, the var-arg must come last. 

Thursday, April 14, 2011

My Eclipse 9 : Failed to create Java Virtual Machine

When I installed latest version of My Eclipse ie My Eclipse 9 initially it worked fine for few days latter suddenly it started giving me error Failed to create Java Virtual Machine.

Here is the solution

It gives Failed to create Java Virtual Machine error because while starting eclipse it created JVM of its own. It require enough free cache memory to do so hence if there is not enough memory it give the Failed to create Java Virtual Machine error.

Go to installation directory

Eg :  C:\Program Files\MyEclipse\MyEclipse 9

You will find a file myeclipse.ini

Eg : C:\Program Files\MyEclipse\MyEclipse 9\myeclipse.ini

You need to provide the existing JVM which is already present and need to require recreating. Remove the VM from file myeclipse.ini and add your custom existing JVM

C:/Program Files/Java/jdk1.6.0_21/jre/bin/javaw.exe

And now when you restart eclipse it will work and wont give Failed to create Java Virtual Machine error.

Wednesday, April 13, 2011

Javascript Print Preview

It was required to print a page with different domain. Where my javascript failed to communicate cross domain using frames. I got below mentioned print preview code when i searched on net. It solved my prblem however it only worked for IE. It didnt worked for Mozilla Firefox.

Below mentioned code works only for IE.

<title> print preview </title>
<script type="text/javascript">
function showPrintPreview()
var OLECMDID = 7;
/* OLECMDID values:
* 6 - print
* 7 - print preview
* 1 - open window
* 4 - Save As
var WebBrowser = '<OBJECT ID="WebBrowser1" WIDTH=0 HEIGHT=0 CLASSID="CLSID:8856F961-340A-11D0-A96B-00C04FD705A2"></OBJECT>';
document.body.insertAdjacentHTML('beforeEnd', WebBrowser);

WebBrowser1.outerHTML = '';


<h1>print preview</h1>
<h2>print preview</h2>
<h3>print preview</h3>
<a href="#" onclick="showPrintPreview()">print preview</a>

I then searched how to get the same functionality in mozilla. I tried the below mentioned codes but it didn't worked any


Hope any one gets this solution.