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Well I already gave you the link to the Java tutorials, so you should work through them. They contain everything you need to learn the basics of Java programming.
Use the best guess
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Thanks , that was help full to me also. 
Jignesh PH
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Look at this link ... Java[^]
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You are newbie in java so i want to suggest you a free online java course. The course is totally free. You can use this tutorial to learn at your own place.
https://www.udemy.com/java-basics-for-j2ee-and-android/?couponCode=techdisfree
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how to get the select box's selected value of one jsp file in to another jsp file please suggest me with some code samples
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Your question is not clear. Try to explain in more detail.
Use the best guess
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i have 3 select drop down boxes in those,in first box i have to print the district names and in second box i have to print the perticular mondal list based on the first selection boxs district and in third box i have to print the village names that is based on the second select boxs result, and these values that is disrict,mondal and village names are in database table please suggest r explain in jsp
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Without knowing the structure of your database or your application it's impossible to say more than: Read the first set of items and populate the first listbox. Then when an item is selected in the listbox use its content to read the next list in sequence and populate the next listbox. And do on as each listbox selection changes.
Use the best guess
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I'm receiving files on a TCP server.(one after another or multiple files one by one)
I want to use them in a LIFO order.
How can I store these files and use these files in java?
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Store Reference to the files in a Stack/Array... Easy Peasy 
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I am an intermediate Java EE developer who wants to develop an online payment system that would work with either a bank or other online payment systems. My problem is because I am inexperienced in this area, the solution I have may not be robust and secure enough, I would like to know what are the issues I have to consider and if possible code samples with explanation to solving this problem.
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teknKAL wrote: because I am inexperienced in this area, the solution I have may not be robust and secure enough
In which case it would not be a good solution. A much better idea whould be to use the interface from a commercial and professional payment gateway such as PayPal.
Use the best guess
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i want to retrieve the database table values as the options of the select box in a jsp form
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Fine, go ahead. But if you are having problems then you need to explain in better detail.
Use the best guess
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Hello Swamy,
Here are few examples. I wonder why you did not find these links?
Regards,
Prasad P. Khandekar
Knowledge exists, man only discovers it.
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thank u all for helping me....
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hi prasad,
actually i am a new programmer i dont know what site to refer thanks for your suggestions.what actually i need id dropdown list population that is suppose i heve two dropdown lists if we select the first dropdown list value as district (example as one of the district name) in the second dropdown list has to diplay the mondal list(that is all the mondals in that district). this is my concept i am really thank full to you if you get me out of this problem. thank
i need this project in jsp.
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A very simple to do this on client side as opposed to server side, is to output all the required data in form of javascript. Since you are talking about javascript the obvious choice is to output it as a JSON. PLease find below a sample JSON and the code to use it to populate the listboxes.
<html>
<head>
<title>List Demo</title>
<script type="text/javascript">
var lstData = {
"key1" : {,
"value":"value1",
"sublist": [
{
"key": "key1_1",
"value":"value1_1",
},
...
]
},
...
};
function fillList1() {
var ctrl = document.getElementById('list1');
ctrl.options.length = 0;
for (var key : lstData) {
var data = lstData[key];
var opt = document.createElement('option');
opt.value = key;
opt.text = data.value;
ctrl.options.add(opt);
}
}
function fillList2(lstOne) {
if (lstOne.selectedIndex < 1) return;
var data = lstData[ctrl.value];
var ctrl = document.getElementById('list2');
ctrl.options.length = 0;
for (var key : data.sublist) {
var subitem = data.sublist[key];
var opt = document.createElement('option');
opt.value = subitem.key;
opt.text = subitem.value;
ctrl.options.add(opt);
}
}
</script>
</head>
<body onload="fillList1();">
<form name="frmMain" id="frmMain" method="post">
<label for="list1">List 1 : </labl>
<select name="list1" id="list1" size="1" onchange="fillList1(this);">
<option value="">Select</option><br/>
</select>
<label for="list2">List 2 : </labl>
<select name="list2" id="list2" size="1">
<option value="">Select</option><br/>
</select>
</form>
</body>
</html>
Regards,
Prasad P. Khandekar
Knowledge exists, man only discovers it.
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hi ,how are you
I have Question ,how to create timetable schedule using Genetic Algorithm for all university
I try with it but it not work with me can any one help me on it?
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 hi，I'd like to bring you some useful stuffs,but I really don't know what the concrete problem you are puzzled.So any codes to show me or tell me the concrete topic you are trying to figure out .
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I don't know how to start with JAVA to create random timetable without any conflict in Classes
How to start with it using Genetic Algorithm
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You need to use Google to find references for this subject. There are many problems to be resolved in creating automatic schedules such as this, and the question is too broad for a technical forum.
Use the best guess
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