How to open html file in default browser from Java Swing application?
- by kovike
My Java Swing application generates html file and I want to open it with default browser when it is generated and saved. How to achieve that?
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How can I get client side information using either Javascript or Java Servlets?
- by reply2viveksshah
How can I get client side information using either Javascript or Java Servlets? Client side information such as client's computer name, its IP Address etc. Thanks in advance.Read the article
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Is there a way to make eclipse report a general "catch (Exception e)" as an error/warning (in java)?
- by Rog
I'm trying to encourage a best practice of not catching general exceptions in Java code. eg: try { ... } catch (Exception e) { // bad! ... } Is there a way to flag this as an error/warning in Eclipse? I know PMD picks this up, but I'd rather avoid integrating it into everyone's build environment at the moment.Read the article
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How do you merge two input streams in Java?
- by J. Pablo Fernández
Having two InputStreams in Java, is there a way to merge them so you end with one InputStream that gives you the output of both streams? How?Read the article
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How I can Optimize this mySQL transaction within java code?
- by worldpython
Dear All, I am new to MySql database. I've large table(ID,...). I select ID frequently with java code and.And that make a heavy load on transaction select from tableName where ID=someID notes: 1.Database could be 100,000 records 2.I can't cache result 3.ID is a primary key 4.I try to optimize time needed to return result from query. Any ideas for optimization ? thanks in advanceRead the article
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Are there any way to apply regexp in java ignoring letter case?
- by Roman
Simple example: we have string "Some sample string Of Text". And I want to filter out all stop words (i.e. "some" and "of") but I don't want to change letter case of other words which should be retained. If letter case was unimportant I would do this: str.toLowerCase().replaceAll ("a|the|of|some|any", ""); Is there an "ignore case" solution with regular expressions in java?Read the article
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What is an instance in Java ? Confused between instance and object
- by happysoul
Are they same ? Came across this line when reading about Java's main method's signature "String args[ ] declares a parameter named args, which is an array of instances of the class String. Objects of type String store character strings."Read the article
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Is there a solution to parse wikipedia xml dump file in Java?
- by Syed
I am trying to parse this huge 25GB Plus wikipedia XML file. Any solution that will help would be appreciated. Preferably a solution in Java.Read the article
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How to learn .wav duration in Java media frame work?
- by yaseemin
Hi all, I am tyring to merge an .mov file with a .wav file using java media framework, thus I need to know their duration. How can I do this? Any ideas would be appreciated..Read the article
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Java: Multi-dimensional array vs. One-dimensional.
- by Mikolan
For example: a) int [x][y][z] vs b) int[x*y*z] Initially thought i'd go with a) for simplicity I know that Java doesn't store arrays linearly in memory like C does. But what implications does this have for my program?Read the article
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Which is the best java driver for mongodb access?
- by Samuel
I have no experience with MongoDB and we are trying to port a JPA application to be based on MongoDB. There are 3 drivers mentioned for porting java here. Which driver would be the easiest to use for converting my existing JPA application? Would it be morphia, mungbean or daybreak. Would prefer some practical experiences with users who have gone through this path before.Read the article
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I need a Java code that takes tab delimited info from a file to a displayed table and updates the fi
- by Rin
I need a Java code that takes tab delimited info from a file to a displayed table. The user should be able to click a row and update it, this is followed by updating the file. The code should use Swing objects.Read the article
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How to design an exception logging table using HyperTable and access it via the Java client?
- by ikevinjp
If I have the following table schema to log an exception (in standard SQL schema): Table: ExceptionLog Columns: ID (Long), ExceptionClass (String), ExceptionMessage (String), Host (String), Port (Integer), HttpHeader (String), HttpPostBody (String), HttpMethod (String) How would I design the same thing in HyperTable (specifically, what is the best approach for efficiency)? And, how would I code it using the HyperTable Java client?Read the article
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Where can I find sample java questions for hands-on ? Not certifications type questions
- by 29b5k
Hi all, Most google results for sample questions/problems for java, results in a link directing to mock certification questions. Does anyone know where can i find sample problems for practice ? ThanksRead the article
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Is there a "best" or more popular database for standalone Java app?
- by Tom Brito
Is there a "best" or more popular database for standalone Java app? I'm currently writing by hand, but I would like to know what is commonly done, if there is something that is commonly done.Read the article
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How to display html formatted text in text area of java application?
- by Deepak
I am scrapping data from web site using my java application and want to display the result after parsing code of html page in a Text Area made in Swing. Text like: hello <b>every</b>one should be displayed as: 'hello everyone' in text area. Thanks!!Read the article
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How to enforce a 5-minute per post rule in a session object in Java?
- by John
I'm trying to figure out how to enforce a 5 minute per post/action rule. I'm developing a web application with Wicket in Java and I've got a session class which I was planning on using to keep track of these timers on a per-user basis. I wasn't planning on storing the timestamp in a database. public boolean isAllowedToPost() { if(null OR has 5 minutes passed since last post) { // set the new timestamp return true; } else { return false; } }Read the article
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Best way to get the highest sum from a Matrix (using Java but algorithm is the issue here)
- by user294896
Sorry I dont know the correct terminology to use but I have a 3x3 matrix like this 1 3 4 5 4 5 2 2 5 and I want get the highest score by picking a value from each row/column but I cant pick the same row or column more than once , so the answer in this case is 3 + 5 + 5 = 13 (row0,col1 + row1,col0 + row2,col2) 4 + 5 + 5 = 14 is not allowed because would have picked two values from col2 I'm using Java, and typically the matrix would be 15 by 15 in size. Is there a name for what Im trying to do, and whats the algorithm thanks PaulRead the article
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How to do method chaining in Java? o.m1().m2().m3().m4()
- by Pentium10
Maybe the title might be better, if someone knows a better one, please edit. I've seen in many Java code notation that after a method we call another, here is an example. Toast.makeText(text).setGravity(Gravity.TOP, 0, 0).setView(layout).show(); As you see after calling makeText on the return we call setGravity and so far. How can I do this with my own classes? Do I have to do anything special?Read the article
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What is the corresponding WPF .NET component to a JTable in Java Swing?
- by Jonas
I have a small Java Swing application that I want to rewrite in WPF .NET. The application uses a JTable with an AbstractTableModel and a custom TableCellRenderer. I use my custom cell renderer to display the objects in two rows. What is the corresponding WPF .NET component to JTable?Read the article
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How do I increment a variable to the next or previous letter in the alphabet in Java?
- by raleighJ
I'm relatively new to Java coding, and was looking for some help. I have a capital letter defined in a variable string, and I want to output the next and previous letters in the alphabet. For example, if the variable was equal to C, I would want to output B and D. Thanks in advance for any help.Read the article
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Why do contains()/indexOf() in a Java collections use o.equals(e) and not e.equals(o)?
- by Fernando
Why are the methods contains() and indexOf() in the Java collections framework defined using o.equals(e) and not e.equals(o) (where o is the argument of the methods and e is the element in the collection)? Anyone know the reasons of that?Read the article
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When do you use Java's @Override annotation and why?
- by Alex B
What are the best practices for using Java's @Override annotation and why? It seems like it would be overkill to mark every single overridden method with the @Override annotation. Are there certain programming situations that call for using the @Override and others that should never use the @Override?Read the article
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Can anyone provide Java program for btree or b+tree???
- by rohit
Hi, I am doing a project in which i require btree or b+tree data structure. but its not an important part of project. it would take my time to write a code for it. I googled it but didn't get anything.... So, can anyone provide java code for btree or b+tree implementation (with insert, delete, search algorithms)?????? it should accept string as input and form btree or b+tree of these string.Read the article
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How do I make vim indent java annotations correctly?
- by wds
When indenting java code with annotations, vim insists on indenting like this: @Test public void ... I want the annotation to be in the same column as the method definition but I can't seem to find a way to tell vim to do that, except maybe using an indent expression but I'm not sure if I can use that together with regular cindent. edit: The filetype plugin was already turned on I just got a bit confused about indenting plugins. The accepted answer may be a bit hackish but works for me as well.Read the article
