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• Decoding international chars in AppEngine

  - by Irro

  I'm making a small project in Google AppEngine but I'm having problems with international chars. My program takes data from the user through the url "page.html?data1&data2..." and stores it for displaying later. But when the user are using some international characters like åäö it gets coded as %F4, %F5 and %F6. I assume it is because only the first 128(?) chars in ASCII table are allowed in http-requests. Is there anyone who has a good solution for this? Any simple way to decode the text? And is it better to decode it before I store the data or should I decode it when displaying it to the user.

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• Using search to solve problems

  - by dan

  am trying to write a 4 x 4 grid using vertical bars and underscore. I have a class for the puzzle, but i want to know what fields and methods i can use to represent and manipulate a configuration for the puzzle

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• im writing this code so the user would enter his/her name and followed by his/her marks to get the a

  - by WM

  What if the user wanted to enter his/her grades in the following way: Will 23, 34, 45, 45 how would i get rid of the commas public class StudentAverage { public static void main(String[] args) { int markSum = 0; double average = 0; Scanner input1 = new Scanner(System.in); System.out.print("Enter student record : "); String name = input1.next(); Scanner input2 = new Scanner(input1.nextLine()); int countTotal = 0; while (input2.hasNextInt()) { countTotal++; markSum += input2.nextInt(); } average = markSum / countTotal; // to calculate the total average System.out.print( name + " " + average ); } }

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• populating html table from database

  - by kawtousse

  Hi everyone, I want to generate html table in my jsp witch display values selected before submitting to allow user to know what did he puts into the form. So I finish the form when submitting the values are inserted in database. Now I search the possibility to display in the same jsp of the form the table having all the values selected. So it is possible ton allow to actions in the form tag to insert and display from database at the same time. Many Thanks for your help.

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• javax.activation.DataSource size question

  - by folone

  How do I get the amount of physical memory, consumed by the DataSource (specifically — ByteArrayDataSource)? I use ByteArrayDataSource (byte[] bytes, String type) constructor, where I get bytes like this: String str = "test"; byte[] bytes = str.getBytes(); Would that be str.length() in bytes? Any other ideas?

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• DLL takes forever to load in JNI class

  - by Rodrigo

  Hi, I'm working with a jni application that loads a dll library, but the load of it is taking too long. The dll is in the path. As a relevant informat, this dll depends on other oracle dlls that are also in the path. System.loadLibrary("exmaple.dll"); Do you have any idea why the load never ends?

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• Guice child injector override binding

  - by Roman

  Hi All I am trying to to override a binding in a child injector that was already configured in a base injector. like that : public class PersistenceModule extends Abstract{ @Override protected void configure() { bind(IProductPersistenceHelper.class).to(ProductPersistenceHelper.class); } } then : Injector injector = Guice.createInjector(new PersistenceModule()); injector.createChildInjector(new AbstractModule(){ @Override protected void configure() { bind(IProductPersistenceHelper.class).to(MockProductPersistenceHelper.class); } }) Guice is complaining that it has already a binding for that. Are there any patterns or best practices for that problem ?

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• why we can't initialize a servlet using constructor itself?

  - by Reddy

  Why do we have to override init() method in Servlets while we can do the initialization in the constructor and have web container call the constructor passing ServletConfig reference to servlet while calling constructor? Ofcourse container has to use reflection for this but container has to use reflection anyway to call a simple no-arg constructor

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• combobox in j2me

  - by learn

  how can i keep the combobox on the form in j2me with out using frameworks? i have tried this but it is not showing any drop down for selection. ChoiceGroup CoursePOP = new ChoiceGroup ("Pop Up choice", Choice.EXCLUSIVE, new String[] {"Python", "J2ME","Symbian"}, null);

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• Problems in Binary Search Tree

  - by user2782324

  This is my first ever trial at implementing the BST, and I am unable to get it done. Please help The problem is that When I delete the node if the node is in the right subtree from the root or if its a right child in the left subtree, then it works fine. But if the node is in the left subtree from root and its any left child, then it does not get deleted. Can someone show me what mistake am I doing?? the markedNode here gets allocated to the parent node of the node to be deleted. the minValueNode here gets allocated to a node whose left value child is the smallest value and it will be used to replace the value to be deleted. package DataStructures; class Node { int value; Node rightNode; Node leftNode; } class BST { Node rootOfTree = null; public void insertintoBST(int value) { Node markedNode = rootOfTree; if (rootOfTree == null) { Node newNode = new Node(); newNode.value = value; rootOfTree = newNode; newNode.rightNode = null; newNode.leftNode = null; } else { while (true) { if (value >= markedNode.value) { if (markedNode.rightNode != null) { markedNode = markedNode.rightNode; } else { Node newNode = new Node(); newNode.value = value; markedNode.rightNode = newNode; newNode.rightNode = null; newNode.leftNode = null; break; } } if (value < markedNode.value) { if (markedNode.leftNode != null) { markedNode = markedNode.leftNode; } else { Node newNode = new Node(); newNode.value = value; markedNode.leftNode = newNode; newNode.rightNode = null; newNode.leftNode = null; break; } } } } } public void searchBST(int value) { Node markedNode = rootOfTree; if (rootOfTree == null) { System.out.println("Element Not Found"); } else { while (true) { if (value > markedNode.value) { if (markedNode.rightNode != null) { markedNode = markedNode.rightNode; } else { System.out.println("Element Not Found"); break; } } if (value < markedNode.value) { if (markedNode.leftNode != null) { markedNode = markedNode.leftNode; } else { System.out.println("Element Not Found"); break; } } if (value == markedNode.value) { System.out.println("Element Found"); break; } } } } public void deleteFromBST(int value) { Node markedNode = rootOfTree; Node minValueNode = null; if (rootOfTree == null) { System.out.println("Element Not Found"); return; } if (rootOfTree.value == value) { if (rootOfTree.leftNode == null && rootOfTree.rightNode == null) { rootOfTree = null; return; } else if (rootOfTree.leftNode == null ^ rootOfTree.rightNode == null) { if (rootOfTree.rightNode != null) { rootOfTree = rootOfTree.rightNode; return; } else { rootOfTree = rootOfTree.leftNode; return; } } else { minValueNode = rootOfTree.rightNode; if (minValueNode.leftNode == null) { rootOfTree.rightNode.leftNode = rootOfTree.leftNode; rootOfTree = rootOfTree.rightNode; } else { while (true) { if (minValueNode.leftNode.leftNode != null) { minValueNode = minValueNode.leftNode; } else { break; } } // Minvalue to the left of minvalue node rootOfTree.value = minValueNode.leftNode.value; // The value has been swapped if (minValueNode.leftNode.leftNode == null && minValueNode.leftNode.rightNode == null) { minValueNode.leftNode = null; } else { if (minValueNode.leftNode.leftNode != null) { minValueNode.leftNode = minValueNode.leftNode.leftNode; } else { minValueNode.leftNode = minValueNode.leftNode.rightNode; } // Minvalue deleted } } } } else { while (true) { if (value > markedNode.value) { if (markedNode.rightNode != null) { if (markedNode.rightNode.value == value) { break; } else { markedNode = markedNode.rightNode; } } else { System.out.println("Element Not Found"); return; } } if (value < markedNode.value) { if (markedNode.leftNode != null) { if (markedNode.leftNode.value == value) { break; } else { markedNode = markedNode.leftNode; } } else { System.out.println("Element Not Found"); return; } } } // Parent of the required element found // //////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// if (markedNode.rightNode != null) { if (markedNode.rightNode.value == value) { if (markedNode.rightNode.rightNode == null && markedNode.rightNode.leftNode == null) { markedNode.rightNode = null; return; } else if (markedNode.rightNode.rightNode == null ^ markedNode.rightNode.leftNode == null) { if (markedNode.rightNode.rightNode != null) { markedNode.rightNode = markedNode.rightNode.rightNode; return; } else { markedNode.rightNode = markedNode.rightNode.leftNode; return; } } else { if (markedNode.rightNode.value == value) { minValueNode = markedNode.rightNode.rightNode; } else { minValueNode = markedNode.leftNode.rightNode; } if (minValueNode.leftNode == null) { // MinNode has no left value markedNode.rightNode = minValueNode; return; } else { while (true) { if (minValueNode.leftNode.leftNode != null) { minValueNode = minValueNode.leftNode; } else { break; } } // Minvalue to the left of minvalue node if (markedNode.leftNode != null) { if (markedNode.leftNode.value == value) { markedNode.leftNode.value = minValueNode.leftNode.value; } } if (markedNode.rightNode != null) { if (markedNode.rightNode.value == value) { markedNode.rightNode.value = minValueNode.leftNode.value; } } // MarkedNode exchanged if (minValueNode.leftNode.leftNode == null && minValueNode.leftNode.rightNode == null) { minValueNode.leftNode = null; } else { if (minValueNode.leftNode.leftNode != null) { minValueNode.leftNode = minValueNode.leftNode.leftNode; } else { minValueNode.leftNode = minValueNode.leftNode.rightNode; } // Minvalue deleted } } } // //////////////////////////////////////////////////////////////////////////////////////////////////////////////// if (markedNode.leftNode != null) { if (markedNode.leftNode.value == value) { if (markedNode.leftNode.rightNode == null && markedNode.leftNode.leftNode == null) { markedNode.leftNode = null; return; } else if (markedNode.leftNode.rightNode == null ^ markedNode.leftNode.leftNode == null) { if (markedNode.leftNode.rightNode != null) { markedNode.leftNode = markedNode.leftNode.rightNode; return; } else { markedNode.leftNode = markedNode.leftNode.leftNode; return; } } else { if (markedNode.rightNode.value == value) { minValueNode = markedNode.rightNode.rightNode; } else { minValueNode = markedNode.leftNode.rightNode; } if (minValueNode.leftNode == null) { // MinNode has no left value markedNode.leftNode = minValueNode; return; } else { while (true) { if (minValueNode.leftNode.leftNode != null) { minValueNode = minValueNode.leftNode; } else { break; } } // Minvalue to the left of minvalue node if (markedNode.leftNode != null) { if (markedNode.leftNode.value == value) { markedNode.leftNode.value = minValueNode.leftNode.value; } } if (markedNode.rightNode != null) { if (markedNode.rightNode.value == value) { markedNode.rightNode.value = minValueNode.leftNode.value; } } // MarkedNode exchanged if (minValueNode.leftNode.leftNode == null && minValueNode.leftNode.rightNode == null) { minValueNode.leftNode = null; } else { if (minValueNode.leftNode.leftNode != null) { minValueNode.leftNode = minValueNode.leftNode.leftNode; } else { minValueNode.leftNode = minValueNode.leftNode.rightNode; } // Minvalue deleted } } } } // //////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// } } } } } } public class BSTImplementation { public static void main(String[] args) { BST newBst = new BST(); newBst.insertintoBST(19); newBst.insertintoBST(13); newBst.insertintoBST(10); newBst.insertintoBST(20); newBst.insertintoBST(5); newBst.insertintoBST(23); newBst.insertintoBST(28); newBst.insertintoBST(16); newBst.insertintoBST(27); newBst.insertintoBST(9); newBst.insertintoBST(4); newBst.insertintoBST(22); newBst.insertintoBST(17); newBst.insertintoBST(30); newBst.insertintoBST(40); newBst.deleteFromBST(5); newBst.deleteFromBST(4); newBst.deleteFromBST(9); newBst.deleteFromBST(10); newBst.deleteFromBST(13); newBst.deleteFromBST(16); newBst.deleteFromBST(17); newBst.searchBST(5); newBst.searchBST(4); newBst.searchBST(9); newBst.searchBST(10); newBst.searchBST(13); newBst.searchBST(16); newBst.searchBST(17); System.out.println(); newBst.deleteFromBST(20); newBst.deleteFromBST(23); newBst.deleteFromBST(27); newBst.deleteFromBST(28); newBst.deleteFromBST(30); newBst.deleteFromBST(40); newBst.searchBST(20); newBst.searchBST(23); newBst.searchBST(27); newBst.searchBST(28); newBst.searchBST(30); newBst.searchBST(40); } }

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• Error using maven profiles

  - by user3127896

  I've added two profiles to my application and that how it looks: <profiles> <profile> <id>dev</id> <properties> <db.username>root</db.username> <db.password>root</db.password> <db.connectionURL>localhost:3306</db.connectionURL> <db.driverClass>com.mysql.jdbc.Driver</db.driverClass> </properties> </profile> <profile> <id>prod</id> <properties> <db.username>prodroot</db.username> <db.password>prodpass</db.password> <db.connectionURL>localhost:3306</db.connectionURL> <db.driverClass>com.mysql.jdbc.Driver</db.driverClass> </properties> </profile> </profiles> In my jdbc.properties file i changed values like this: jdbc.driverClassName=${db.driverClass} jdbc.dialect=org.hibernate.dialect.MySQLDialect jdbc.databaseurl=jdbc:mysql://${db.connectionURL}/dbname jdbc.username=${db.username} jdbc.password=${db.password} And here's bean from spring-container.xml <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close" p:driverClassName="${jdbc.driverClassName}" p:url="${jdbc.databaseurl}" p:username="${jdbc.username}" p:password="${jdbc.password}" /> When i try to deploy my application i got following error: SEVERE: Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener org.springframework.beans.factory.BeanDefinitionStoreException: Invalid bean definition with name 'dataSource' defined in ServletContext resource [/WEB-INF/spring-servlet.xml]: Could not resolve placeholder 'db.driverClass' Structure of project: Any ideas what i'm doing wrong? Thanks in advance!

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• Convert an array of primitive longs into a List of Longs

  - by CaptainAwesomePants

  This may be a bit of an easy, headesk sort of question, but my first attempt surprisingly completely failed to work. I wanted to take an array of primitive longs and turn it into a list, which I attempted to do like this: long[] input = someAPI.getSomeLongs(); List<Long> = Arrays.asList(input); //Total failure to even compile! What's the right way to do this?

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• get indexes of n smallest elements in an array

  - by erasmus

  I have an int array int[] myArray = new int[100]; and want to get indexes of smallest 10 (any n) elements. How can I do this?

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• Can anybody explain the code

  - by girinie

  class giri{ public static void main(String args[]) { int x = 17; int y = 013; System.out.println("x+y = " + x+y); } } When I run the program I get the output 1711. Can anybody tell me How do I get 1711

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• Having Latest Tests Results info in the notified email with Hudson

  - by Roberto

  I have a project with a lot of tests failing, so it would be great for me to receive by email the number of failed tests compare from the latest build. What i need is just the info that appears in the project's page by the test results link: Latest Test Result (10 failures / -2) Is this possible? I've already tried the email-ext plugin, but it is not telling me that info (I can have the list of failing tests with output etc., but I really just need that info above). Any ideas?

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• Install Maven2 on Karmic

  - by magneticMonster

  Is there a .deb for Maven2 on Karmic Koala? I see maven2, but it has 100+MB of dependencies (!). Is there a package that is only mvn and none of those dependencies?

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• No Hibernate Session bound to thread exception

  - by Benchik

  I have Hibernate 3.6.0.Final and Spring 3.0.0.RELEASE I get "No Hibernate Session bound to thread, and configuration does not allow creation of non-transactional one here" If I add the thread specification back in, I get "saveOrUpdate is not valid without active transaction" Any ideas? The spring-config.xml: <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close"> <property name="driverClassName" value="org.hsqldb.jdbcDriver"/> <property name="url" value="jdbc:hsqldb:mem:jsf2demo"/> <property name="username" value="sa"/> <property name="password" value=""/> </bean> <bean id="sampleSessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean"> <property name="dataSource" ref="sampleDataSource"/> <property name="annotatedClasses"> <list> <value>com.maxheapsize.jsf2demo.Book</value> </list> </property> <property name="hibernateProperties"> <props> <!-- prop key="hibernate.connection.pool_size">0</prop--> <prop key="hibernate.show_sql">true</prop> <prop key="hibernate.dialect">org.hibernate.dialect.HSQLDialect</prop> <!-- prop key="transaction.factory_class">org.hibernate.transaction.JDBCTransactionFactory</prop> <prop key="hibernate.current_session_context_class">thread</prop--> <prop key="hibernate.hbm2ddl.auto">create</prop> </props> </property> </bean> <bean id="sampleDataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource"> <property name="driverClassName"> <value>org.hsqldb.jdbcDriver</value> </property> <property name="url"> <value> jdbc:hsqldb:file:/spring/db/springdb;SHUTDOWN=true </value> </property> <property name="username" value="sa"/> <property name="password" value=""/> </bean> <bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager"> <property name="sessionFactory" ref="sampleSessionFactory"/> </bean> <bean id="daoTxTemplate" abstract="true" class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean"> <property name="transactionManager" ref="transactionManager"/> <property name="transactionAttributes"> <props> <prop key="create*"> PROPAGATION_REQUIRED,ISOLATION_READ_COMMITTED </prop> <prop key="get*"> PROPAGATION_REQUIRED,ISOLATION_READ_COMMITTED </prop> </props> </property> </bean> <bean name="openSessionInViewInterceptor" class="org.springframework.orm.hibernate3.support.OpenSessionInViewInterceptor"> <property name="sessionFactory" ref="sampleSessionFactory"/> <property name="singleSession" value="true"/> </bean> <bean id="nameDao" parent="daoTxTemplate"> <property name="target"> <bean class="com.maxheapsize.dao.NameDao"> <property name="sessionFactory" ref="sampleSessionFactory"/> </bean> </property> </bean> and the DAO: public class NameDao { private SessionFactory sessionFactory; public void setSessionFactory(SessionFactory sessionFactory) { this.sessionFactory = sessionFactory; } public SessionFactory getSessionFactory() { return sessionFactory; } @Transactional @SuppressWarnings("unchecked") public List<Name> getAll() { Session session = this.sessionFactory.getCurrentSession(); List<Name> names = (List<Name>)session.createQuery("from Name").list(); return names; } //@Transactional(propagation= Propagation.REQUIRED, readOnly=false) @Transactional public void save(Name name){ Session session = this.sessionFactory.getCurrentSession(); session.saveOrUpdate(name); session.flush(); } }

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• How to define a url not found servlet mapping in web.xml?

  - by user246114

  Hi, I have a web app, I want to define my index.jsp file to be shown when the entered url is like: www.mysite.com www.mysite.com/ www.mysite.com/index.jsp but if any other url is entered, like: wwww.mysite.com/g I want a particular servlet to handle the request. In my web.xml file, I am doing this: <servlet> <servlet-name>ServletCore</servlet-name> <servlet-class>com.me.test.ServletCore</servlet-class> </servlet> <servlet-mapping> <servlet-name>ServletCore</servlet-name> <url-pattern>/*</url-pattern> </servlet-mapping> so that is letting the ServletCore servlet pick up any url, but as expected it is taking over even the: www.mysite.com/index.jsp type urls. How can I define it in such a way to work how I want? Thank you

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• OutOfMemoryError creating a tree recursively?

  - by Alexander Khaos Greenstein

  root = new TreeNode(N); constructTree(N, root); private void constructTree(int N, TreeNode node) { if (N > 0) { node.setLeft(new TreeNode(N-1)); constructTree(N-1, node.getLeft()); } if (N > 1) { node.setMiddle(new TreeNode(N-2)); constructTree(N-2, node.getMiddle()); } if (N > 2) { node.setRight(new TreeNode(N-3)); constructTree(N-3, node.getRight()); } Assume N is the root number, and the three will create a left middle right node of N-1, N-2, N-3. EX: 5 / | \ 4 3 2 /|\ 3 2 1 etc. My GameNode class has the following variables: private int number; private GameNode left, middle, right; Whenever I construct a tree with an integer greater than 28, I get a OutOfMemoryError. Is my recursive method just incredibly inefficient or is this natural? Thanks!

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• Is it possible to set different look and feel for different panels within a same frame?

  - by swift

  Say, I have 3 panels added to a frame and for the 1st panel i want to set the metal look and feel, for the 2nd panel I want windows look and feel, for the third panel it should be default swing style. is it possible?

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• How to check if my string is equal to null?

  - by Roman

  I want to perform some action ONLY IF my string has a meaningful value. So, I tried this. if (!myString.eqauls("")) { doSomething } and this if (!myString.eqauls(null)) { doSomething } and this if ( (!myString.eqauls("")) && (!myString.eqauls(null))) { doSomething } and this if ( (!myString.eqauls("")) && (myString!=null)) { doSomething } and this if ( myString.length()>0) { doSomething } And in all cases my program doSomething in spite on the fact that my string IS EMPTY. It equals to null. So, what is wrong with that?

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• How to change the jtooltip timers for 1 component.

  - by i30817

  I have a component where i want to display a custom jtooltip. That is easy, just change the getTooltip method. Similar for location and text. However i also want to change the timers. The tooltip should always be displayed if the mouse is over a cellrenderer of the component. If it leaves all of those it should be turned invisible. I know that i can use TooltipManager to control the times globally. But the best solution is probably to just shortcircut that and display the tooltip myself with a mouselistener. However when i tried to do that (unregister the component in TooltipManager and setting the tooltip visible, with text and in the correct position, in a mouse listener) the tooltip never showed at all. What am i doing wrong?

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• trigger OS to copy (ctrl+c or Ctrl-x) programicly

  - by Crash893

  I'm working on a program to trigger cut and pastes Pastes i have no problem with (i just dump a string into the clipboard) Cut and or Copys are proving to be a little more difficult The program i have is out of focus and has several hot keys registered with the os ( ctrl+alt+2 ctrl+alt+3 etc) that i want to use to trigger Windows to copy anything that is highlighted in the window that is focused I tried doing a sendkeys SendKeys.Send("^c"); but that seems to work once or twice if at all then stop working. is there a better way to try to trigger windows into coping highlighted content on a different window

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• create an hotspot and set an image without background (like earth icon) to my panel

  - by sirvan

  Hi I try to create an hotspot by Extends of canvas and I try to add it on a panel witch painted by images , so I must to draw an icon (image) instead of clear rectangle of the screen, to do that I override the paint method to draw the icon I want to use, so far there is no problem, the hotspot work true and the icon painted in true size I want(32,24 pixel) I try to add this hotspot after painting image on the my panel in mypanel.paint(g) that override too. The problem , I use an car icon that have no background !!(I hope you can understand me) just car icon must be show on the panel that painted with my images; But an unwanted rectangle created around the icon and made bad view, How I can paint may icon on panel without that background? Please help me.

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• Can a plain servlet be configured as a seam component?

  - by stacker

  I created a plain servlet within a seam-gen (2.1.2) application, now I would like to use injection. Thus I annotated it with @Name and it's recognized as component: INFO [Component] Component: ConfigReport, scope: EVENT, type: JAVA_BEAN, class: com.mycompany.servlet.ConfigReport Unfortunatly the injection of the logger doesn't work NullPointerException in init() import org.jboss.seam.annotations.Logger; import org.jboss.seam.annotations.Name; import org.jboss.seam.log.Log; @Name("ConfigReport") public class ConfigReport extends HttpServlet { @Logger private Log log; public void init(ServletConfig config) throws ServletException { log.info( "BOOM" ); } } Is my approach abusive? What would be the alternatives (the client sending requests to the servlet is curl, not a browser)?

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