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• how to remove the <br/> using regex in java?

  - by androidbase Praveen

  how to get value without <br/> tag using regex n java? my String is: <Div> West Newton, MA 02465 <br/>USA </Div> output should be like: West Newton, MA 02465 USA How?

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• How to detect and replace non-printable characters in a string using Java ?

  - by Frank

  For instance I have a string like this : abc123[*]xyz[#]098[~]f9e [*] , [#] and [~] represents 3 different non-printable characters. How can I replace them with "X" in Java ? Frank

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• How can i combine crystal reports and JAVA SWT?

  - by Armin

  I have to create reports from my application (java, swt). For reports i am using crystal reports, but i have problem, i can't find SWT code that enables me to open (create) and save report. I have found Swing code that enables me to do that, but i cant find SWT code. So can somebody explain me, or give me code, or tutorial that will help me to to that. Tnx.

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• Java Google App Engine Datastore: 'IN' operator available on JDO query filters, as with Python?

  - by Jim Blackler

  This page describes an 'IN' operator that can be used in GAE Datastore to compare a field against a list of possible matches, not just a single value: However this is for Python. In Java (App Engine 1.2.5), trying query.setFilter("someField IN param"); on my javax.jdo.query fires a JDOUserException 'Portion of expression could not be parsed: IN param'. Is there a way this can be done?

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• How to sort a Map<Key, Value> on the values in Java?

  - by Abe

  I am relatively new to Java, and often find that I need to sort a Map on the values. Since the values are not unique, I find myself converting the keySet into an array, and sorting that array through array sort with a custom comparator that sorts on the value associated with the key. Is there an easier way?

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• What is a simple way to get ACID transactions with persistence on the local file system (in Java)?

  - by T.R.

  I'm working on a small (java) project where a website needs to maintain a (preferably comma-separated) list of registered e-mail addresses, nothing else, and be able to check if an address is in the list. I have no control over the hosting or the server's lack of database support. Prevayler seemed a good solution, but the website is a ghost town, with example code missing from just about everywhere it's supposed to be, so I'm a little wary. What other options are recommended for such a task?

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• Is it possible to develop IPhone applications with Java?

  - by Wing C. Chen

  I accidentally bumped into an ad like this: http://monotouch.net/DownloadTrial?ref=so1. Then I start to wonder if we have an equivalent thing in Java. From my understanding, objective c is still the only language that people use to develop iPhone apps. Is this true?

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• What's a good library for parsing mathematical expressions in java?

  - by CSharperWithJava

  I'm an Android Developer and as part of my next app I will need to evaluate a large variety of user created mathematical expressions and equations. I am looking for a good java library that is lightweight and can evaluate mathematical expressions using user defined variables and constants, trig and exponential functions, etc. I've looked around and Jep seems to be popular, but I would like to hear more suggestions, especially from people who have used these libraries before.

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• What are the best ways to convert MS word file to image or pdf preferably using java?

  - by Vaibhav Kamble

  I want to convert MS word formatted documents to images and pdf. I am well versed with Java. I was looking for apis using which I can do the same. Can anyone please point me to that ? If you know the best alternatives even though they are for other languages , please update me about that.

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• How to retrieve forbidden characters for filenames, in Java?

  - by Gnoupi

  There are some restricted characters (and even full filenames, in Windows), for file and directory names. This other question covers them already. Is there a way, in Java, to retrieve this list of forbidden characters, which would be depending on the system (a bit like retrieving the line breaker chars)? Or can I only put the list myself, checking for the system?

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• What is the difference between serialization and synchronization in java?

  - by androidbase Praveen

  What is the difference between serialization and synchronization in java? I need an explanation or a tutorial.

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• How to refresh external Jars in eclipse project (Java)?

  - by user299535

  Hi all, I have a java project in Eclipse which includes a couple of external jar files. These external jar files are being rebuilt through a different process (not eclipse, ant). Those changes are not being reflected on the eclipse project even if I refresh the project. If I close the project and reopen, it works. Any suggestions on how I could expedite the project without having to close and reopen? Thanks, Praveen.

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• I have to implement Encryption using 3DES in java . I am new to it. Please suggest

  - by Erick

  I have to implement 3DES encryption using 3DES in java. As I am new to this. Could you please suggest and provide good samples to proceed.

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• Why is the synchronized keyword in Java called 'synchronized' instead of the more precise 'mutex'?

  - by Edward D'Souza

  I've heard that choosing to use the word 'synchronized' to describe mutexed statements is simply a mistake in Java, but I'm wondering if there is actually a reason behind the choice.

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• [Java Stripes] How can I use List of object with Stripes "option" tag ?

  - by cscsaba242

  Hello, I have a List of object, produced by JPA q.getResultList(). I would like to use it in a drop down, but Stripes "option" tag cant accept List, just Collection, Enum and Map. Im new to Java, that why perhaps the List can translated to each of them but I dont know how can I solve this issue. (Stripes select,option-map,-enumeration, -collection can build up a drop down from previous mentioned input object structures ) Thanks advance

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• How do I read Unicode characters from an MS Access 2007 database through Java?

  - by Peter

  In Java, I have written a program that reads a UTF8 text file. The text file contains a SQL query of the SELECT kind. The program then executes the query on the Microsoft Access 2007 database and writes all fields of the first row to a UTF8 text file. The problem I have is when a row is returned that contains unicode characters, such as "?". These characters show up as "?" in the text file. I know that the text files are read and written correctly, because a dummy UTF8 character ("?") is read from the text file containing the SQL query and written to the text file containing the resulting row. The UTF8 character looks correct when the written text file is opened in Notepad, so the reading and writing of the text files are not part of the problem. This is how I connect to the database and how I execute the SQL query: ---- START CODE Connection c = DriverManager.getConnection("jdbc:odbc:Driver={Microsoft Access Driver (*.mdb, *.accdb)};DBQ=C:/database.accdb;Pwd=temp"); ResultSet r = c.createStatement().executeQuery(sql); ---- END CODE I have tried making a charSet property to the Connection but it makes no difference: ---- START CODE Properties p = new Properties(); p.put("charSet", "utf-8"); p.put("lc_ctype", "utf-8"); p.put("encoding", "utf-8"); Connection c = DriverManager.getConnection("...", p); ---- END CODE Tried with "utf8"/"UTF8"/"UTF-8", no difference. If I enter "UTF-16" I get the following exception: "java.lang.IllegalArgumentException: Illegal replacement". Been searching around for hours with no results and now turn my hope to you. Please help! I also accept workaround suggestions. =) What I want to be able to do is to make a Unicode query (for example one that searches for posts that contain the "?" character) and to have results with Unicode characters receieved and saved correctly. Thank you!

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• How to delete only the content of a file in java?

  - by Santhosh

  hi, May i please know how can i delete the content of the file in java? Thanks in advance.

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• Best location to put your CSS and JS files in a Mavenized Java Web app?

  - by MexicanHacker

  I have a Web application in maven that follows this structure: src `-- main |-- java |-- resources `-- webapp Is is better to put it in the main folder and then the maven plug in will try to move it or I should put it inside the webapp folder and why?

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• Which logger framework in java shall one use based on performance and consistency criterion?

  - by Vaibhav Kamble

  Which logger framework in java shall one use based on performance and consistency criterion? I need to use it in highly concurrent application and do not wish to use any log wrappers. Please suggest based on these requirements. -Vaibhav

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• How to create an Array, ArrayList, Stack and Queue in Java?

  - by theband

  I was reading a Java article, but found no differences in the declaration and was confused over. Can anyone list me out this? Added the Article http://www.theparticle.com/javadata2.html

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• Difference in System. exit(0) , System.exit(-1), System.exit(1 ) in java

  - by girinie

  Hi I like to know difference between the following in java System.exit(0); System.exit(-1); System.exit(1); When do I have to use the above code appropriately. Thanks

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• What is a best practice of writing hash function in java?

  - by den-javamaniac

  Hi. I'm wondering what is the best practice for writing #hashCode() method in java. Good description can be found here. Is it that good?

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• What files should be added to SVN in an eclipse Java project?

  - by Jake Petroules

  I have a Java project I'd like to commit to my SVN repository, created with eclipse. Now, what files (aside from the source code, obviously) are necessary? In the workspace root, there is a .settings folder with many files and subfolders, and inside the project folder there are two files - .classpath and .project, and another .settings folder with a single file - org.eclipse.jdt.core.prefs. Which of these files should be committed to SVN and which can be safely excluded?

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• Java - is it possible to read a file line by line, stop, and then immediately start reading bytes wh

  - by hatorade

  I'm having an issue trying to parse the ascii part of a file, and once I hit the end tag, IMMEDIATELY start reading in the bytes from that point on. Everything I know in Java to read off a line or a whole word creates a buffer, which ruins any chance of getting the bytes immediately following my stop point. Is the only way to do this read in byte-by-byte, find new-lines, reconstruct everything prior to the new-line, see if it's my end tag, and go from there?

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• How to modify/add code to the initComponents() method in Java on Net Beans?

  - by Ahmad Farid

  How to modify/add code to the initComponents() method in Java on Net Beans? When I try to add any line of code this area seems to be like read only and it's highlighted in gray! It's for security probably, but I suppose there is a way to disable that.

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