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  • Convert scientific notation to decimal notation

    - by Ankur
    There is a similar question on SO which suggests using NumberFormat which is what I have done. I am using the parse() method of NumberFormat. public static void main(String[] args) throws ParseException{ DecToTime dtt = new DecToTime(); dtt.decToTime("1.930000000000E+02"); } public void decToTime(String angle) throws ParseException{ DecimalFormat dform = new DecimalFormat(); //ParsePosition pp = new ParsePosition(13); Number angleAsNumber = dform.parse(angle); System.out.println(angleAsNumber); } The result I get is 1.93 I didn't really expect this to work because 1.930000000000E+02 is a pretty unusual looking number, do I have to do some string parsing first to remove the zeros? Or is there a quick and elegant way?

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  • Overlay of multiple colors in ImageJ

    - by nico
    Hi everyone, I'm writing a little plugin for imageJ and I am drawing several regions as an overlay on the image. I'm using this code: ImagePlus imp = getImage(); Overlay ov = new Overlay(); for (int r=0; r<regions.length; r++) { ov.add(regions[r]); } imp.setOverlay(ov); Where regions is an array of Roi. This works as intended and draws the regions in the (hurting to my eyes) standard ImageJ cyan used for overlays. I would like to draw one particular region in another colour, but I cannot seem to find a way to do it. I found that you can change the colour of the whole overlay, but I need two colours in the same overlay. Any ideas? Thanks in advance nico

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  • How to split a path platform independent?

    - by Janusz
    I'm using the following code to get an array with all sub directories from a given path. String[] subDirs = path.split(File.separator); I need the array to check if certain folders are at the right place in this path. This looked like a good solution until findBugs complains that File.separator is used as a regular expression. It seems that passing the windows file separator to a function that is building a regex from it is a bad idea because the backslash being an escape character. How can I split the path in a cross platform way without using File.separator? Or is code like this okay? String[] subDirs = path.split("/");

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  • GRAPH PROBLEM: find an algorithm to determine the shortest path from one point to another in a recta

    - by newba
    I'm getting such an headache trying to elaborate an appropriate algorithm to go from a START position to a EXIT position in a maze. For what is worth, the maze is rectangular, maxsize 500x500 and, in theory, is resolvable by DFS with some branch and bound techniques ... 10 3 4 7 6 3 3 1 2 2 1 0 2 2 2 4 2 2 5 2 2 1 3 0 2 2 2 2 1 3 3 4 2 3 4 4 3 1 1 3 1 2 2 4 2 2 1 Output: 5 1 4 2 Explanation: Our agent looses energy every time he gives a step and he can only move UP, DOWN, LEFT and RIGHT. Also, if the agent arrives with a remaining energy of zero or less, he dies, so we print something like "Impossible". So, in the input 10 is the initial agent's energy, 3 4 is the START position (i.e. column 3, line 4) and we have a maze 7x6. Think this as a kind of labyrinth, in which I want to find the exit that gives the agent a better remaining energy (shortest path). In case there are paths which lead to the same remaining energy, we choose the one which has the small number of steps, of course. I need to know if a DFS to a maze 500x500 in the worst case is feasible with these limitations and how to do it, storing the remaining energy in each step and the number of steps taken so far. The output means the agent arrived with remaining energy= 5 to the exit pos 1 4 in 2 steps. If we look carefully, in this maze it's also possible to exit at pos 3 1 (column 3, row 1) with the same energy but with 3 steps, so we choose the better one. With these in mind, can someone help me some code or pseudo-code? I have troubles working this around with a 2D array and how to store the remaining energy, the path (or number of steps taken)....

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  • How to inject JPA EntityManager using spring

    - by marcos
    Hello all! I have a few questions about jpa + spring integration running on tomcat, i've been looking fo some time and couldn't find any concrete answer, so here it goes: Is it possible to have spring to inject the JPA entityManager object into my DAO class without extending JpaDaoSupport? if yes, does spring manage the transaction in this case? I'm trying to keep spring configuration as simple as possible: <bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager"> <property name="entityManagerFactory" ref="em"/> </bean> <bean id="em" class="org.springframework.orm.jpa.LocalEntityManagerFactoryBean"> <property name="persistenceUnitName" value="myPU"/> </bean> EDIT: that was very helpfull, thank you all!

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  • algorithm for image comparison

    - by Rajnikant
    Please consider following use case, I have one bigger image, lets called is master image. Now from some where else, I am getting one small image. I want to check whether this small image is subset of master image or not. important points are, smaller image might have different file format, smaller image might captured from comparatively different view. smaller image may have different light intensity. At this stage of algorithm/computation advancement, which level of accuracy I could expect? Any algorithm/open source implementation that would have such implementation? Thanks, Rajnikant

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  • why i can't start orbd service CORBA IIOP?

    - by user326801
    why i can't start orbd service CORBA IIOP? C:start orbd -ORBInitialPort 1050 C:orbd -ORBInitialPort 1050 Failed to start ORBD because of an Internal Exception. Possible Causes: 1. Specified ORBInitialPort or ORBActivationPort is already in use 2. No Write Permission to write orb.db C:

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  • Regarding Multiple Tab-Class

    - by Christine
    Hi! I've problem regarding GUI with one Menu and one Order Class. I've created a variable to store how many items have been selected in the Menu Class. private int totalSelected; The var totalSelected is live updated. It can be changed anytime depending on actionPerformed() function.(Exp: totalSelected will add up all the selected items) In the Order Class, how can I access to the live update variable totalSelected in order to retrieve the live update value? When I invoke getTotalSelected() function inside the Menu Class, I will only obtain a 0 value. Thanks for your help ^^!

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  • migrating an embedded jetty server from v6 to v7

    - by Ceilingfish
    Hi chaps, I have an embedded servlet which I use in unit tests, looks like this: public class UnitTestWebservices extends AbstractHandler { private Server server; private Map<Route,String> data = new HashMap<Route,String>(); public UnitTestWebservices(int port) throws Exception { server = new Server(port); server.setHandler(this); server.start(); } public void handle(String url, HttpServletRequest request, HttpServletResponse response, int arg3) throws IOException, ServletException { final Route route = Route.valueOf(request.getMethod(), url); final String content = data.get(route); if(content != null) { final ServletOutputStream stream = response.getOutputStream(); stream.print(content); stream.flush(); stream.close(); } else { response.sendError(HttpServletResponse.SC_NOT_FOUND); } } .... } That's written using version 6.1.24 of Jetty. I tried switching over to use Jetty 7.1.1.v20100517, and updated that code to this: public class UnitTestWebservices extends AbstractHandler { private Server server; private Map<Route,String> data = new HashMap<Route,String>(); public UnitTestWebservices(int port) throws Exception { server = new Server(port); server.setHandler(this); server.start(); } public void handle(String url, Request request, HttpServletRequest servletRequest, HttpServletResponse response) throws IOException, ServletException { final Route route = Route.valueOf(request.getMethod(), url); final String content = data.get(route); request.setHandled(true); response.setContentType("application/json"); if(content != null) { response.setStatus(HttpServletResponse.SC_OK); final Writer stream = response.getWriter(); stream.append(content); } else { response.sendError(HttpServletResponse.SC_NOT_FOUND); } } } But whenever I tried to access make a request to the server it would hang indefinitely. Has anyone experienced anything similar?. It also printed this into the log: log4j:WARN No appenders could be found for logger (org.eclipse.jetty.util.log). log4j:WARN Please initialize the log4j system properly. org.eclipse.jetty.server.Server@670655dd STOPPED +-UnitTestWebservices@50ef5502 started

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  • Spring MVC Best Practice Handling Unrecoverable Exceptions In Controller

    - by jboyd
    When you have a controller that does logic with services and DAO's that may throw an unrecoverable exception, what is the best practice in dealing with those method calls? Currently an app I'm working on has very lengthy try catch methods that simply err.out exception messages, this doesn't seem very robust and I think that this code smells, is there any cookie cutter best practice for handling this in spring-mvc?

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  • Creating an adjacency Matrix from a JUNG Graph.

    - by prince
    Graph < Integer, Integer> g = new SparseMultigraph<Integer, Integer>(); g.addVertex(1);g.addVertex(2);g.addVertex(3); g.addEdge(0,1,2 ,EdgeType.DIRECTED);g.addEdge(1,2,3 ,EdgeType.DIRECTED);g.addEdge(2,3,1 ,EdgeType.DIRECTED);g.addEdge(3,1,3 ,EdgeType.DIRECTED); How can I convert this graph into an adjacency matrix taking into consideration that it is a directed graph.

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  • Why is ContextConfiguration location different in idea and eclipse

    - by jakob
    Hello experts. In my team we work both in Eclipse and Idea. That works pretty good, except for one minor issue that I can't figure out how to solve. When setting the ContextConfiguration location in our tests and running them inside Eclipse everything works like a charm: @Test(groups = { "database" }) @ContextConfiguration(locations = {" file:src/main/webapp/WEB-INF/applicationContext.xml" }) But in my Idea env I get "could not find applicationContext" error. I need to set the location like this(project name is services): @Test(groups = { "database" }) @ContextConfiguration(locations = {" file:services/src/main/webapp/WEB-INF/applicationContext.xml" }) The project structure is like this: parent.pom with two child poms: services.pom and other.pom. When running the test in the terminal from the service project like this: mvn -Dtest=com.mytest.service.somepackage.TheTest test there are no issues. I guess that since my project structure is parent-with-two-children the need of /service is necessary(The project is created by pointing out the parent pom). Is there a way to fix this? Could you please help me with a solution. thx

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  • Can't update textbox in TinyMCE

    - by Michael Tot Korsgaard
    I'm using TinyMCE, the text area is replaced with a TextBox, but when I try to update the database with the new text from my textbox, it wont update. Can anyone help me? My code looks like this <%@ Page Title="" Language="C#" MasterPageFile="~/Main.Master" AutoEventWireup="true" CodeBehind="default.aspx.cs" Inherits="Test_TinyMCE._default" ValidateRequest="false" %> <asp:Content ID="Content1" ContentPlaceHolderID="head" runat="server"> <script src="JavaScript/tiny_mce/tiny_mce.js" type="text/javascript"></script> <script type="text/javascript"> tinyMCE.init({ // General options mode: "textareas", theme: "advanced", plugins: "pagebreak,style,layer,table,save,advhr,advimage,advlink,emotions,iespell,insertdatetime,pre view,media,searchreplace,print,contextmenu,paste,directionality,fullscreen,noneditable,visualchars,no nbreaking,xhtmlxtras,template,wordcount,advlist,autosave", // Theme options theme_advanced_buttons1: "save,newdocument,|,bold,italic,underline,strikethrough,|,justifyleft,justifycenter,justifyright,justifyfull,styleselect,formatselect,fontselect,fontsizeselect", theme_advanced_buttons2: "cut,copy,paste,pastetext,pasteword,|,search,replace,|,bullist,numlist,|,outdent,indent,blockquote,|,undo,redo,|,link,unlink,anchor,image,cleanup,help,code,|,insertdate,inserttime,preview,|,forecolor,backcolor", theme_advanced_buttons3: "tablecontrols,|,hr,removeformat,visualaid,|,sub,sup,|,charmap,emotions,iespell,media,advhr,|,print,|,ltr,rtl,|,fullscreen", theme_advanced_buttons4: "insertlayer,moveforward,movebackward,absolute,|,styleprops,|,cite,abbr,acronym,del,ins,attribs,|,visualchars,nonbreaking,template,pagebreak,restoredraft", theme_advanced_toolbar_location: "top", theme_advanced_toolbar_align: "left", theme_advanced_statusbar_location: "bottom", theme_advanced_resizing: true, // Example content CSS (should be your site CSS) // using false to ensure that the default browser settings are used for best Accessibility // ACCESSIBILITY SETTINGS content_css: false, // Use browser preferred colors for dialogs. browser_preferred_colors: true, detect_highcontrast: true, // Drop lists for link/image/media/template dialogs template_external_list_url: "lists/template_list.js", external_link_list_url: "lists/link_list.js", external_image_list_url: "lists/image_list.js", media_external_list_url: "lists/media_list.js", // Style formats style_formats: [ { title: 'Bold text', inline: 'b' }, { title: 'Red text', inline: 'span', styles: { color: '#ff0000'} }, { title: 'Red header', block: 'h1', styles: { color: '#ff0000'} }, { title: 'Example 1', inline: 'span', classes: 'example1' }, { title: 'Example 2', inline: 'span', classes: 'example2' }, { title: 'Table styles' }, { title: 'Table row 1', selector: 'tr', classes: 'tablerow1' } ], // Replace values for the template plugin template_replace_values: { username: "Some User", staffid: "991234" } }); </script> </asp:Content> <asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" runat="server"> <div> <asp:TextBox ID="TextBox1" runat="server" TextMode="MultiLine"></asp:TextBox> <br /> <asp:LinkButton ID="LinkButton1" runat="server" onclick="LinkButton1_Click">Update</asp:LinkButton> </div> </asp:Content> My codebhind looks like this using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; namespace Test_TinyMCE { public partial class _default : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { TextBox1.Text = Database.GetFirst().Text; } protected void LinkButton1_Click(object sender, EventArgs e) { Database.Update(Database.GetFirst().ID, TextBox1.Text); TextBox1.Text = Database.GetFirst().Text; } } } And finally the "Database" class im using looks like this using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Configuration; using System.Data.SqlClient; namespace Test_TinyMCE { public class Database { public int ID { get; set; } public string Text { get; set; } public static void Update(int ID, string Text) { SqlConnection connection = new SqlConnection(ConfigurationManager.AppSettings["DatabaseConnection"]); connection.Open(); try { SqlCommand command = new SqlCommand("Update Text set Text=@text where ID=@id"); command.Connection = connection; command.Parameters.Add(new SqlParameter("id", ID)); command.Parameters.Add(new SqlParameter("text", Text)); command.ExecuteNonQuery(); } finally { connection.Close(); } } public static Database GetFirst() { SqlConnection connection = new SqlConnection(ConfigurationManager.AppSettings["DatabaseConnection"]); connection.Open(); try { SqlCommand command = new SqlCommand("Select Top 1 ID, Text from Text order by ID asc"); command.Connection = connection; SqlDataReader reader = command.ExecuteReader(); if (reader.Read()) { Database item = new Database(); item.ID = reader.GetInt32(0); item.Text = reader.GetString(1); return item; } else { return null; } } finally { connection.Close(); } } } } I really hope that someone out there can help me

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  • Google App Engine ClassNotPersistenceCapableException

    - by Frank
    I have the following class : import javax.jdo.annotations.IdGeneratorStrategy; import javax.jdo.annotations.IdentityType; import javax.jdo.annotations.PersistenceCapable; import javax.jdo.annotations.Persistent; import javax.jdo.annotations.PrimaryKey; import com.google.appengine.api.datastore.*; @PersistenceCapable(identityType=IdentityType.APPLICATION) public class PayPal_Message { @PrimaryKey @Persistent(valueStrategy=IdGeneratorStrategy.IDENTITY) private Long id; @Persistent private Text content; @Persistent private String time; public PayPal_Message(Text content,String time) { this.content=content; this.time=time; } public Long getId() { return id; } public Text getContent() { return content; } public String getTime() { return time; } public void setContent(Text content) { this.content=content; } public void setTime(String time) { this.time=time; } } It used to be in a package, and works fine, now I put all classes in the default package, which caused me this error : org.datanucleus.jdo.exceptions.ClassNotPersistenceCapableException: The class "The class "PayPal_Message" is not persistable. This means that it either hasnt been enhanced, or that the enhanced version of the file is not in the CLASSPATH (or is hidden by an unenhanced version), or the Meta-Data/annotations for the class are not found." is not persistable. This means that it either hasnt been enhanced, or that the enhanced version of the file is not in the CLASSPATH (or is hidden by an unenhanced version), or the Meta-Data for the class is not found. NestedThrowables: org.datanucleus.exceptions.ClassNotPersistableException: The class "PayPal_Message" is not persistable. This means that it either hasnt been enhanced, or that the enhanced version of the file is not in the CLASSPATH (or is hidden by an unenhanced version), or the Meta-Data/annotations for the class are not found. What should I do to fix it ?

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  • thread reaches end but isn't removed

    - by pstanton
    I create a bunch of threads to do some processing: new Thread("upd-" + id){ @Override public void run(){ try{ doSomething(); } catch (Throwable e){ LOG.error("error", e); } finally{ LOG.debug("thread death"); } } }.start(); I know i should be using a threadPool but i need to understand the following problem before i change it: I'm using eclipse's debugger and looking at the threads in the debug pane which lists active threads. Many of them complete as you would expect, and are removed from the debug pane, however some seem to stay in the list of active threads even though the log shows the "thread death" entry for these. When i attempt to debug these threads, they either do not pause for debugging or show an error dialog: "A timeout occurred while retrieving stack frames for thread: upd-...". there is some synchronization going on within the doSomething() call but i'm fairly sure it's ok and since the "thread death" log is being called i'm assuming these threads aren't deadlocked in that method. i don't do any Thread.join()s, however i do call a third party API but doubt they do either. Can anyone think of another reason these threads are lingering? Thanks. EDIT: I created this test to check the Garbage Collection theory: Thread thread = new Thread("!!!!!!!!!!!!!!!!") { @Override public void run() { System.out.println("running"); ThreadUs.sleepQuiet(5000); System.out.println("finished"); // <-- thread removed from list here } }; thread.start(); ThreadUs.sleepQuiet(10000); System.out.println(thread.isAlive()); // <-- thread already removed from list but hasn't been GC'd ThreadUs.sleepQuiet(10000); this proves that it is nothing to do with garbage collection as eclipse removes the thread from the thread list as soon as it completes and isn't waiting for the object to be de-referenced/GC'd.

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  • Why are error pages ignored in RESTEasy web service running on Tomcat?

    - by Chandru
    I'm developing a REST-ful web service using RESTEasy deployed on Tomcat. I've configured an error page which takes the exception's message and generates an XML based on it when any exception occurs during the request. This works fine for any application generated exceptions. However, if client sends an invalid XML which cannot be unmarshalled correctly, an javax.xml.bind.UnmarshalException is thrown and Tomcat's default error page is used instead of mine. I have configured my error page to the error-code 500 in web.xml. Is using error pages the correct way to handle errors when using RESTEasy or is there an alternative way?

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  • custom button: properties change, button should be redrawn

    - by Rutger
    Hi I'm developing an Android app. I have class derived from button to represent a special type of button. This special type has some properties (integers) and according to these one or more circles have to be drawn on top of the button. So I overrode the onDraw function, which looks the values up and accordingly draws the circles. But the class has a function to set new values for its properties. So new values are set but the changes are not reflected in the UI. It seems like the onDraw function is not called. When later I click the button or show a pop up message above my interface the onDraw function is called and the button is drawn correctly. So my question: when changing the properties how can I say that the button has to be redrawn? Thanks a lot!

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  • Problem locating file in a classpath

    - by Gandalf StormCrow
    I'm trying to read in file content, ex : public void myMethod(){ FileInputStream fstream = new FileInputStream(fileLocation); // Get the object of DataInputStream DataInputStream in = new DataInputStream(fstream); BufferedReader br = new BufferedReader(new InputStreamReader(in)); String strLine; while ((strLine = br.readLine()) != null) { .... .... ..... end while end method And I have at the begining of the class body private String fileLocation; and at the end of a class I have a getter and setter for it. Now I'm trying inject this file location from spring inside bean from this class and I specify the init-method of this class. But I get error cannot find the specified file as if its not on a classpath but it is inside war file? I'm building the project with maven and I put file in src/main/resources This is the error I get when trying to read file : Error: src\main\resources\ids.txt (The system cannot find the path specified) That is when I tried this : FileInputStream fstream = new FileInputStream("src\\main\\resources\\ids.txt"); how to reference the properly from the classpath? EDIT When I edit my code according to @BalusC solution , here is how it looks but I still get null error : ClassLoader classLoader = Thread.currentThread().getContextClassLoader(); InputStream input = classLoader.getResourceAsStream("src/main/resources/ids.txt"); // Get the object of DataInputStream BufferedReader br = new BufferedReader(new InputStreamReader(input)); String strLine; while ((strLine = br.readLine()) != null) { .... .... ..... end while end method

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  • Custom view in ListView disappears while scrolling in Android

    - by troorl
    Hi. I wrote a simple custom view for rows in ListView. It works fine, but when I try to scroll the list, I see only white rows without content. And when scrolling is over, rows continue to show again. This is how I draw a custom view: @Override protected void onDraw(Canvas canvas) { if(poster != null) { canvas.drawBitmap(poster, padding, padding, paint); } canvas.drawText(title, 55 + padding, 16 + padding, paint); } Maybe I missed something? P.S. This is short screencast (400kb) http://dl.dropbox.com/u/190203/test.mpeg

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  • Separate log files for each web application and shared libraries with log4j

    - by oo_olo_oo
    I have few web applications run on the Tomcat server. Each application contains its own log4j library copy inside its own war. This allows for separate, flexible logging configuration per application. I also have few shared libraries (kept in Tomcat's shared libraries directory). I would like to have shared library loggers output among with the application (which uses them) loggers output (for example: if application A logs to file a.log, and uses library b.jar, I would like b.jar to log also to the a.log file). The problem is, that the shared libraries are loaded by the shared classloader, which causes that they can't access loggers defined by the applications. Is there any solution for this issue?

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  • Reloading of persisted entity

    - by Udi
    I'm using OpenJPA in my application as a JPA vendor. The question is theoretical or conceptual: Is there any way to tell an entity manager to load an entity from the DB rather than from it's cache? The problematic scenario: EM1.persist(Entity1) EM2.merge(Entity1) EM1.find(Entity1) <--- Entity1 is the cached version rather than the merged one.. Any elegant way to do it? I really don't want to call em.refresh(entity).

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  • What Does OSGi Solve?

    - by Pablo Fernandez
    I've read on wikipedia and other sites about OSGi, but I don't really see the big picture. It says that it's a component based platform, and that you can reload modules at runtime. Also the "practical example" given everywhere is the Eclipse Plugin Framework. My questions are: 1) What is the CLEAR and SIMPLE definition of OSGi? 2) What COMMON PROBLEMS does it solve? By "common problems" I mean problems we face everyday, like "what can OSGi do for making our jobs more efficient/fun/simple" Thanks.

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