Jaya's Blog.......................

Friday, September 11, 2015

JAVA Threads

1. What is a Thread...?

When simply put a thread is a program's path of execution. A java program may have one or more threads.

2. Purpose of having threads

The purpose of threads is to allow the program to do multiple things at one time. This helps to make time and resource efficient programs.

Ex: One thread can do calculations while another thread prints a data sheet and some other thread could deal with user in puts at the same time.If only one thread existed in the program all above tasks should have done one after another. Thanks to threads all three task can be perform at the same time and hence make the program time efficient. And also the resources (CPU time, the memory, etc.) of the computer could be waist if the program has to wait until it take all the inputs to do calculations. This could cause the resources to be idle for some time. Threading concept helps the program to utilize all the resources it has.
Having multiple threads in a program is called as Multithreading.

How to Auto Generate Buttons in JAVA

Well this is something amazing You can create any number of Buttons using an Array
This kind of code you will need to use probably if you don't know how many buttons you need in your program. You can create many buttons as you want using lesser lines.

Here goes the codes........... Enjoy

starter_itemCounter =100; // This stores the element number in button array

JButton[] buttonArray = new JButton[starter_itemCounter]; // Create the array

int Bcounter=1; // Used to count button names. we store names for each button in dofferent array

/* Count the 'y position' place of the JButton and JLabel in GUI. This helps the button to fall one after another */
int place=25;

int starterCounter = 1; // Count button array items

while(Bcounter < starter_itemCounter && starterCounter < starter_itemCounter)
{

// Print JButton

/* Create a new button and add button name from button name array */
buttonArray[starterCounter] = new JButton(""+starter_name[Bcounter]);

buttonArray[starterCounter].setBounds(25, place, 300, 25);

panel.add(buttonArray[starterCounter]);

starterCounter++;

Bcounter++;

place += 46;

I used this code to create a hotel menu system which auto generate buttons according to the food names stored in the hotel Data Base. Customer only has to click a button to place an order

An image of the Hotel Menu System's GUI is shown at the top of this post

thank you :)

Friday, August 12, 2011

Create a Simple Calculator using JavaScripts and HTML

Hi readers today I'm going to tell you how to create a simple calculator.
I wrote this code using html, javascript and css. It require only a little knowledge about those languages. So hop you enjoy.

<html>



<head>

<title>

My Simple Calculator

</title>

<script>

function Addition()
{
val =parseInt(form1.value1.value)+parseInt(form1.value2.value);
Display(val);
}

function Subscription()
{
val =parseInt(form1.value1.value)-parseInt(form1.value2.value);
Display(val);
}

function Multiplication()
{
val =parseInt(form1.value1.value)*parseInt(form1.value2.value);
Display(val);
}

function Divition()
{
val =parseInt(form1.value1.value)/parseInt(form1.value2.value);
Display(val);
}

function Display(val)
{
form1.answer.value="";
if(!form1.value1.value =="" && !form1.value2.value=="")
form1.answer.value = String(val);
}

function Empty()
{
if(form1.value1.value =="")
{
defaultVal = prompt("Enter both values","Enter Here");
form1.value1.value = defaultVal;
}

else if(form1.value2.value=="")
{
defaultVal = prompt("Enter both values","Enter Here");
form1.value2.value = defaultVal;
}
form1.value1.value.focus();
form1.value2.value.focus();
}
</script>

</head>

<body>

<form name="form1">

<table align="center" cellspacing="20" border="0" style=" background-color: GreenYellow; border-width: 3px; border-color:#000000;border-style: solid;">

<tr>

<th colspan="4"><u> My Simple Calculator</u></th>

</tr>

<tr >

<td colspan="2">value1:</td>

<td colspan="2">value2:</td>

</tr>

<tr >

<td colspan="2"><input type="textbox" name="value1" style="background-color:

GreenYellow;color:OrangeRed;border:3px double Green;"></td>

<td colspan="2"><input type="textbox" name="value2" style="background-color:
GreenYellow;color:OrangeRed;border:3px double Green;"></td>

</tr>

<tr>

<td><input type="button" value="Add" onclick="Addition()" onBlur="Empty()" style="background-color: OrangeRed;color:GreenYellow;border:3px double Orange;"></td>

<td><input type="button" value="Minus" onclick="Subscription()" onBlur="Empty()" style="background-color: OrangeRed;color:GreenYellow;border:3px double Orange;"></td>

<td><input type="button" value="Multiply" onclick="Multiplication()" onBlur="Empty()" style="background-color: OrangeRed;color:GreenYellow;border:3px double Orange;"></td>

<td><input type="button" value="Divide" onclick="Divition()" onBlur="Empty()" style="background-color: OrangeRed;color:GreenYellow;border:3px double Orange;"></td>

</tr>

<tr >
<td colspan="3">Answer:<input type="textbox" name="answer" style="background-color: GreenYellow;color:OrangeRed;border:3px double Green;"></td>

<td><input type="button" value="Reset" onclick="Reset()" onBlur="Empty()" style="background-color: OrangeRed;color:GreenYellow;border:3px double Orange;"></td>

</tr>

</table>

</form>

</body>

</html>

At the end if you code correctly you will get the above interface on your browser.

If you have any problem just leave a comment

Good Luck

Monday, August 8, 2011

How to Get User Given String to an Array in "C" Language

#include <stdio.h>

int main()
{
char YourText[20];//save the user's string

fputs("Enter your text: ", stdout);
fflush(stdout);
fgets(YourText, sizeof YourText, stdin);

int i;
for(i=0; YourText[i] !='\0'; i++)
printf("%c",YourText[i]);

}//End main

/*

jayangaVliyanage
Jayanga's Blog.........................(http://jayangaliyanage.blogspot.com/)

*/

How to Access Blocked Sites with UltraSurf

Hi guys today I'm writing about a cool software. We all hate to be blocked our urls. But some servers do not grant access for cool sites like

Don't be upset here's something for u.........

"UltraSurf" helps to bypass DNS server blocking. So if your server block your 'url's just use this and have fun.

In some situations it will seems as illegal for some party. So

Please don't use this for any kind of violation.

If you don't have UltraSurf download it from here

here are the steps after that

Extract the downloaded zip file
Double click and run UltraSurf

Software interface is like this
Go to "options" and click proxy settings.
There enter your enter your HTTP proxy and port in Manual Proxy Settings. Press ok

Now you are ready to go
Go to home tab and surf through web with no blocking.