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  • Which Java MVC frameworks integrate easily with StringTemplate?

    - by Daniel Jomphe
    It's hard to see how StringTemplate integrates easily (or not) with popular Java web MVC frameworks. Which Java MVC frameworks integrate easily with StringTemplate? A good answer: mentions one solution to integrate with a framework, includes a link to something useful and applicable, like: a tutorial, or documentation, or a reference to source code: free, and open source or public domain. Readers/Voters, please vote for a solution if you know it's true and great. In the scope of this question, I am not interested in any other templating engine than StringTemplate.

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  • The conventional location for storing my Java libraries and applications in UNIX based systems

    - by Bytecode Ninja
    I usually store the Java applications and JAR files that I download from the Web in the ~/Java folder on my computer (an OS X machine). I have been doing this since the days when I was a Windows user. However I think in UNIX based systems user local apps are conventionally stored in another directory. I have a feeling that this directory should either be /usr/local/, /usr/local/USERNAME, /opt/local, or /opt/local/USERNAME but I am not sure. Any ideas which directory can I use for this purpose? Please note that, I am talking about archive files that I download from the Web, unpack and use locally and not programs that have installation scripts or MacPorts, etc.

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  • Error preverifying class java during build (BlackBerry)

    - by Davide Vosti
    I'm trying do build and debug a small project for BlackBerry. During the build I'm getting this error Error preverifying class java ... I read on the net this error could be caused by referencing multiple projects but I tried to move every package in a single project but the error is still there. I tried with multiple JDE version (currently 4.7) and the Java compiler is set to 1.6. Eclipse version is 3.4.1 as recommended by RIM's documentations. Does someone have some clue?

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  • Java template classes using generator or similar?

    - by Hugh Perkins
    Is there some library or generator that I can use to generate multiple templated java classes from a single template? Obviously Java does have a generics implementation itself, but since it uses type-erasure, there are lots of situations where it is less than adequate. For example, if I want to make a self-growing array like this: class EasyArray { T[] backingarray; } (where T is a primitive type), then this isn't possible. This is true for anything which needs an array, for example high-performance templated matrix and vector classes. It should probably be possible to write a code generator which takes a templated class and generates multiple instantiations, for different types, eg for 'double' and 'float' and 'int' and 'String'. Is there something that already exists that does this? Edit: note that using an array of Object is not what I'm looking for, since it's no longer an array of primitives. An array of primitives is very fast, and uses only as much space a sizeof(primitive) * length-of-array. An array of object is an array of pointers/references, that points to Double objects, or similar, which could be scattered all over the place in memory, require garbage collection, allocation, and imply a double-indirection for access. Edit2: good god, voted down for asking for something that probably doesn't currently exist, but is technically possible and feasible? Does that mean that people looking for ways to improve things have already left the java community? Edit3: Here is code to show the difference in performance between primitive and boxed arrays: int N = 10*1000*1000; double[]primArray = new double[N]; for( int i = 0; i < N; i++ ) { primArray[i] = 123.0; } Object[] objArray = new Double[N]; for( int i = 0; i < N; i++ ) { objArray[i] = 123.0; } tic(); primArray = new double[N]; for( int i = 0; i < N; i++ ) { primArray[i] = 123.0; } toc(); tic(); objArray = new Double[N]; for( int i = 0; i < N; i++ ) { objArray[i] = 123.0; } toc(); Results: double[] array: 148 ms Double[] array: 4614 ms Not even close!

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  • Java: how to get mercurial current changeset number for use in program

    - by Rabarberski
    I've recently started using mercurial for version control in a Java project. When I run my program, the input parameters it has used to produce certain a output, are written to a specific file. It would be nice if I could add the current mercurial changeset number (indicating the version of my program) to that output file as well. What would be the easiest way to do so on Windows? I could write a simple Java parser to fetch the output of the first line of the hg log -l 1 command, but perhaps there is an easier way (i.e., less code lines)?

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  • Java stop MIDI playback

    - by user456268
    Hi I have java application which plays midi messages from sequence. I'm doing this using jfugue library. the problem is when I'm tryingto stop playback with stop button (which call sequencer.stop() and sequencer.close()) the last played note is sound all of rest time, and I can't stop it. So I'm asking about solution about stopping all audio and MIDI too! sound playback from java application. Notice: If you want propose just mute volume, you need to know that I want end-use will be able to press play button again and hear the sound again, so muting volumr will be not a solution, or explain please. Thank you!

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  • SSL and Tomcat using Java

    - by Marquinio
    Hello all, I'm new to SSL connections so here goes my question. I have a desktop Java program in a JAR file. This JAR sends sensitive information over the internet to a remote Tomcat server. Of course I need to encrypt the data. If I purchase an SSL cerfiticate say from Verisign, will the data sent over SSL be automatically encrypted? I mean in my JAR, will I still need to do extra work like use Java encryption extensions API to manually encrypt my data over the SSL connection? Thank you.

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  • Best ways to construct Dynamic Search Conditions for Sql

    - by CoolBeans
    I have always wondered what's the best way to achieve this task. In most web based applications you have to provide search options on many different criteria. Based on what criteria is chosen behind the scene you modify your SQL. Generally, this is how I tend to go about it:- Have a base SQL template. In the base template have conditions like this WHERE [#PRE_COND1] AND [#PRE_COND2] .. so on and so forth. So an example SQL might look something like SELECT NAME,AGE FROM PERSONS [,#TABLE2] [,#TABLE3] WHERE [#PRE_COND1] AND [#PRE_COND2] ORDER BY [#ORD_COND1] AND [#ORD_COND2] etc. During run time after figuring out the all the search criteria user has entered, I replace the [#PRE_COND1]s and [#ORD_COND1]s with the appropriate SQLs and then execute the query. I personally do not like this brute force method. However, I never came across a better approach either. How do you accomplish such tasks generally given you are either using native JDBC or Spring JDBC? It is almost like I need a C MACRO like functionality in Java to do this.

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  • flipping 2d components in java

    - by aniket
    i am trying to flip a pentahex (5 hexagons joined at their sides). Is it possible to do so in Java? I mean suppose 2 of the 3 hexagons are in one quadrant can I change their quadrant? It is similar to what we do to flip images in Paint. The same utility I am trying to perform in Java. I have heard about Affine transform wherein it makes use of a bit called TYPE_FLIP, but I am not sure how to use it. Any small example would be of great help. Note: I do not want to flip images, but actual 2D objects.

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  • When to define SDD operations System->Actor?

    - by devoured elysium
    I am having some trouble understanding how to make SDDs, as I don't fully grasp why in some cases one should define operations for System - Actor and in others don't. Here is an example: 1) The User tells the System that wants to buy some tickets, stating his client number. 2) The System confirms that the given client number is valid. 3) The User tells the System the movie that wants to see. 4) The System shows the set of available sessions and seats for that movie. 5) The System asks the user which session/seat he wants. 6) The user tells the System the chosen session/seat. This would be converted to: a) -----> tellClientNumber(clientNumber) b) <----- validClientNumber c) -----> tellMovieToSee(movie) d) <----- showsAvailableSeatsHours e) -----> tellSystemChosenSessionSeat(session, seat) I know that when we are dealing with SDD's we are still far away from coding. But I can't help trying to imagine how it how it would have been had I to convert it right away to code: I can understand 1) and 2). It's like if it was a C#/Java method with the following signature: boolean tellClientNumber(clientNumber) so I put both on the SDD. Then, we have the pair 3) 4). I can imagine that as something as: SomeDataStructureThatHoldsAvailableSessionsSeats tellSystemMovieToSee(movie) Now, the problem: From what I've come to understand, my lecturer says that we shouldn't make an operation on the SDD for 5) as we should only show operations from the Actor to the System and when the System is either presenting us data (as in c)) or validating sent data (such as in b)). I find this odd, as if I try to imagine this like a DOS app where you have to put your input sequencially, it makes sense to make an arrow even for 5). Why is this wrong? How should I try to visualize this? Thanks

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  • Please , Explain these java code ..?

    - by soma
    I want understand these code before java lab exam especially methode import javax.swing.; import java.util.; import java.text.*; public class EnglishCalendar { public static String[] months = { "January" , "February" , "March", "April" , "May" , "June", "July" , "August" , "September", "October" , "November" , "December" }; public static int days[] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }; private void showMonth(int m, int y) { int lead_spaces = 0; if (m < 0 || m > 11) { System.out.println("It should be 1 to 12"); } else { System.out.println(); System.out.println(" " + months[m] + " " + y); System.out.println(); GregorianCalendar cal = new GregorianCalendar(y, m, 0); System.out.println("Su Mo Tu We Th Fr Sa "); lead_spaces = cal.get(Calendar.DAY_OF_WEEK); int day_of_month = days[m]; if (cal.isLeapYear(cal.get(Calendar.YEAR)) && m == 1){ day_of_month++;} for (int i = 0; i < lead_spaces; i++) { System.out.print(" "); } for (int i = 1; i <= day_of_month; i++) { if (i < 10) System.out.print(" "); System.out.print(i); if ((lead_spaces + i) % 7 == 0) { System.out.println(); } else { System.out.print(" "); } } System.out.println(); } } private static void doSimpleDateFormat() { Calendar now = Calendar.getInstance(); SimpleDateFormat formatter = new SimpleDateFormat("E yyyy.MM.dd 'at' hh:mm:ss a zzz"); System.out.print(" \n It is now : " + formatter.format(now.getTime())); System.out.println(); } public static void main(String[] args) { String mo = JOptionPane.showInputDialog("Month"); String ye = JOptionPane.showInputDialog("Year"); int mon = new Integer(mo).intValue(); int yea = new Integer(ye).intValue(); EnglishCalendar k = new EnglishCalendar(); k.showMonth(mon - 1 , yea); doSimpleDateFormat(); } }

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  • Equivalent for Java's System.getProperty("java.io.tmpdir") in C ?

    - by B_
    As the title says, the java.io.tmpdir property in Java is really nice, and I can't find an equivalent for C. I'm writing for Windows and in Visual Studio. I don't want to just use something like C:\Temp because in later versions of windows the appropriate directory could be something like C:\Users\[UserName]\AppData\Local\Temp and a way to retrieve this would be much easier. I want a directory and not just a temp file because I'm downloading and executing a file from the internet. As a side note, if anyone can give me tips about how to better google for C stuff it would be much appreciated :)

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  • How can I install Java on Windows 7 without messing up the system?

    - by robert_d
    I've installed java 1.6.0_31 32bit on Windows 7 64bit system, but this installation messed up my system, e.g. when I start Google Chrome I get error Your preferences can not be read Visual Studio 2010 after launching shows error that The Application Data folder for Visual Studio could not be created The shortcut to the Downloads folder in Windows Explorer no longer works. Is there a way to install Java without messing up Windows 7? Or maybe this mess can be cleaned up after installation of Java, but how?

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  • How can I install Java SDK on Windows 7 without messing up the system?

    - by robert_d
    I've installed Java SE Development Kit 1.6.0_31 32bit on Windows 7 64bit system, but this installation messed up my system, e.g. when I start Google Chrome I get error Your preferences can not be read Visual Studio 2010 after launching shows error that The Application Data folder for Visual Studio could not be created The shortcut to the Downloads folder in Windows Explorer no longer works. BTW this is pretty clean install, on other occasions after Java installation I had problems like this http://forums.techguy.org/windows-vista/808717-solved-c-windows-system32-config.html Is there a way to install Java SDK without messing up Windows 7? Or maybe this mess can be cleaned up after installation of Java, but how?

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  • Java - Loading dlls by a relative path and hide them inside a jar

    - by supertreta
    Hi guys, I am developing a Java application that should be release as a jar. This program depends on c++ external libraries called by JNI. To load them, I use the method System.load with an absolute path and this works fine. However, I really want to "hide" them inside the jar, so I have created a package to collect them. This forces me to load an relative path - the package path. By this approach, I let the user run the jar in any directory, without being worried about linking the dll's or bored with a previous installation process. This throws the expected exception: Exception in thread "main" java.lang.UnsatisfiedLinkError: Expecting an absolute path of the library How can I get this working? Thanks for your help!

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  • When to define SDD(System Sequence Diagram) operations System->Actor?

    - by devoured elysium
    I am having some trouble understanding how to make System Sequence Diagrams, as I don't fully grasp why in some cases one should define operations for System - Actor and in others don't. Here is an example: Let's assume the System is a Cinema Ticket Store and the Actor is a client that wants to buy a ticket. 1) The User tells the System that wants to buy some tickets, stating his client number. 2) The System confirms that the given client number is valid. 3) The User tells the System the movie that wants to see. 4) The System shows the set of available sessions and seats for that movie. 5) The System asks the user which session/seat he wants. 6) The User tells the System the chosen session/seat. This would be converted to: a) -----> tellClientNumber(clientNumber) b) <----- validClientNumber c) -----> tellMovieToSee(movie) d) <----- showsAvailableSeatsHours e) -----> tellSystemChosenSessionSeat(session, seat) I know that when we are dealing with SDD's we are still far away from coding. But I can't help trying to imagine how it how it would have been had I to convert it right away to code: I can understand 1) and 2). It's like if it was a C#/Java method with the following signature: boolean tellClientNumber(clientNumber) so I put both on the SDD. Then, we have the pair 3) 4). I can imagine that as something as: SomeDataStructureThatHoldsAvailableSessionsSeats tellSystemMovieToSee(movie) Now, the problem: From what I've come to understand, my lecturer says that we shouldn't make an operation on the SDD for 5) as we should only show operations from the Actor to the System and when the System is either presenting us data (as in c)) or validating sent data (such as in b)). I find this odd, as if I try to imagine this like a DOS app where you have to put your input sequencially, it makes sense to make an arrow even for 5). Why is this wrong? How should I try to visualize this? Thanks

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  • Run Java Application as a Service

    - by Jason
    I would like to run a Java application as a service. Unfortunately, I am limited in that I can't use something like the Java Service Wrapper (which does appear to be an excellent tool). Is there any way of running an executable JAR, as a service, without relying on external applications? I currently have the service installed, but it fails to start. This is where I am getting stuck and I haven't been able to find anything on Google other than information about the JSW. Thanks.

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