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  • Calling generic method in spring.net application context

    - by Bert Vandamme
    Hi, I'm trying to invoke this method in spring.net, but i'm having trouble getting the configuration right. Method: public void AddRepository(IRepository repository) where TEntity : IEntity { Repositories.Add(repository.GetType().Name, repository); } Config: <object type="Spring.Objects.Factory.Config.MethodInvokingFactoryObject, Spring.Core"> <property name="TargetObject"> <ref local="RepositoryFactory" /> </property> <property name="TargetMethod" value="AddRepository"/> <property name="Arguments"> <list> <ref object="BinaryAssetFileRepository"/> </list> </property> </object>" Is it possible to address generic methods in this way? Thx, Bert

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  • using ResultSet.Previous method not working in Java using .mdb file OBDC

    - by jsonnie
    Hello, I'm currently having an issue with my open result set not working how I believe it should. The only function that is currently working is the next() method, nothing else will work. If the project is placed into a debug mode you can follow through actionperformed event on the button it hits the previous() method and jumps over the remaining code in the method. If someone could point me in the right direction it would be truly appreciated. FORM CODE: import java.sql.; import javax.swing.; public class DataNavigator extends javax.swing.JFrame { public DataInterface db = null; public Statement s = null; public Connection con = null; public PreparedStatement stmt = null; public ResultSet rs = null; /** Creates new form DataNavigator */ public DataNavigator() { initComponents(); try { db = new DataInterface("jdbc:odbc:CMPS422"); con = db.getConnection(); stmt = con.prepareStatement("SELECT * FROM Products"); rs = stmt.executeQuery(); rs.last(); } catch (Exception e) { } } /** This method is called from within the constructor to * initialize the form. * WARNING: Do NOT modify this code. The content of this method is * always regenerated by the Form Editor. */ @SuppressWarnings("unchecked") // <editor-fold defaultstate="collapsed" desc="Generated Code"> private void initComponents() { btnFirst = new javax.swing.JButton(); btnNext = new javax.swing.JButton(); btnLast = new javax.swing.JButton(); btnUpdate = new javax.swing.JButton(); btnInsert = new javax.swing.JButton(); btnDelete = new javax.swing.JButton(); txtPartNum = new javax.swing.JTextField(); txtDesc = new javax.swing.JTextField(); txtQty = new javax.swing.JTextField(); txtPrice = new javax.swing.JTextField(); jLabel1 = new javax.swing.JLabel(); jLabel2 = new javax.swing.JLabel(); jLabel3 = new javax.swing.JLabel(); jLabel4 = new javax.swing.JLabel(); btnPrev = new javax.swing.JButton(); setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE); setTitle("Assignment 3 Data Navigator"); addWindowListener(new java.awt.event.WindowAdapter() { public void windowOpened(java.awt.event.WindowEvent evt) { formWindowOpened(evt); } }); btnFirst.setText("First"); btnFirst.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { btnFirstActionPerformed(evt); } }); btnNext.setText("Next"); btnNext.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { btnNextActionPerformed(evt); } }); btnLast.setText("Last"); btnLast.addActionListener(new java.awt.event.ActionListener() { public void actionPerformed(java.awt.event.ActionEvent evt) { btnLastActionPerformed(evt); } }); btnUpdate.setText("Update"); btnInsert.setText("Insert"); btnDelete.setText("Delete"); jLabel1.setText("Part Number:"); jLabel2.setText("Description:"); jLabel3.setText("Quantity:"); jLabel4.setText("Price:"); btnPrev.setText("Prev"); btnPrev.addMouseListener(new java.awt.event.MouseAdapter() { public void mouseClicked(java.awt.event.MouseEvent evt) { btnPrevMouseClicked(evt); } }); javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane()); getContentPane().setLayout(layout); layout.setHorizontalGroup( layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(layout.createSequentialGroup() .addContainerGap() .addComponent(btnFirst) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(layout.createSequentialGroup() .addGap(2, 2, 2) .addComponent(btnPrev) .addGap(4, 4, 4) .addComponent(btnNext) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) .addComponent(btnLast)) .addComponent(jLabel1) .addComponent(jLabel2) .addComponent(jLabel3) .addComponent(jLabel4)) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false) .addComponent(txtPartNum) .addGroup(layout.createSequentialGroup() .addComponent(btnUpdate) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) .addComponent(btnInsert) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) .addComponent(btnDelete)) .addComponent(txtDesc) .addComponent(txtQty) .addComponent(txtPrice)) .addContainerGap(71, Short.MAX_VALUE)) ); layout.setVerticalGroup( layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(layout.createSequentialGroup() .addContainerGap() .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE) .addComponent(btnFirst) .addComponent(btnNext) .addComponent(btnLast) .addComponent(btnUpdate) .addComponent(btnInsert) .addComponent(btnDelete) .addComponent(btnPrev)) .addGap(66, 66, 66) .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING) .addComponent(jLabel1) .addComponent(txtPartNum, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING) .addComponent(txtDesc, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) .addComponent(jLabel2)) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING) .addComponent(txtQty, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) .addComponent(jLabel3)) .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED) .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING) .addComponent(txtPrice, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE) .addComponent(jLabel4)) .addContainerGap(102, Short.MAX_VALUE)) ); pack(); }// </editor-fold> private void formWindowOpened(java.awt.event.WindowEvent evt) { try { this.txtPartNum.setText(rs.getString("Partnum")); this.txtDesc.setText(rs.getString("Description")); this.txtPrice.setText(rs.getString("Price")); this.txtQty.setText(rs.getString("Quantity")); } catch (SQLException e) { } } private void btnNextActionPerformed(java.awt.event.ActionEvent evt) { // TODO add your handling code here: try { System.out.println(rs.getCursorName()); rs.next(); rs.moveToCurrentRow(); System.out.println(rs.getCursorName()); this.txtPartNum.setText(rs.getString("Partnum")); this.txtDesc.setText(rs.getString("Description")); this.txtPrice.setText(rs.getString("Price")); this.txtQty.setText(rs.getString("Quantity")); System.out.println(rs.getRow()); } catch (Exception e) { } } private void btnLastActionPerformed(java.awt.event.ActionEvent evt) { // TODO add your handling code here: try { rs.last(); this.txtPartNum.setText(rs.getString("Partnum")); this.txtDesc.setText(rs.getString("Description")); this.txtPrice.setText(rs.getString("Price")); this.txtQty.setText(rs.getString("Quantity")); } catch (Exception e) { } } private void btnFirstActionPerformed(java.awt.event.ActionEvent evt) { // TODO add your handling code here: try { rs.first(); this.txtPartNum.setText(rs.getString("Partnum")); this.txtDesc.setText(rs.getString("Description")); this.txtPrice.setText(rs.getString("Price")); this.txtQty.setText(rs.getString("Quantity")); } catch (Exception e) { } } private void btnPrevMouseClicked(java.awt.event.MouseEvent evt) { // TODO add your handling code here: try { int i; i = rs.getRow(); if (i > 0) { rs.previous(); System.out.println(rs.getRow()); this.txtPartNum.setText(rs.getString("Partnum")); this.txtDesc.setText(rs.getString("Description")); this.txtPrice.setText(rs.getString("Price")); this.txtQty.setText(rs.getString("Quantity")); } else { System.out.println("FALSE"); } } catch (Exception e) { } } /** * @param args the command line arguments */ public static void main(String args[]) { java.awt.EventQueue.invokeLater(new Runnable() { public void run() { new DataNavigator().setVisible(true); } }); } // Variables declaration - do not modify private javax.swing.JButton btnDelete; private javax.swing.JButton btnFirst; private javax.swing.JButton btnInsert; private javax.swing.JButton btnLast; private javax.swing.JButton btnNext; private javax.swing.JButton btnPrev; private javax.swing.JButton btnUpdate; private javax.swing.JLabel jLabel1; private javax.swing.JLabel jLabel2; private javax.swing.JLabel jLabel3; private javax.swing.JLabel jLabel4; private javax.swing.JTextField txtDesc; private javax.swing.JTextField txtPartNum; private javax.swing.JTextField txtPrice; private javax.swing.JTextField txtQty; // End of variables declaration } CLASS OBJECT CODE: import java.sql.*; import javax.swing.JOptionPane; public class DataInterface { private static DataInterface dbint = null; private static Connection conn = null; // connection object. private static ResultSet rset = null; public DataInterface(String ODBCDSN) { try { // See if the driver is present. Class.forName("sun.jdbc.odbc.JdbcOdbcDriver"); // Open connection to database. conn = DriverManager.getConnection(ODBCDSN); JOptionPane.showMessageDialog(null, "Database successfully opened"); } catch (Exception e) { JOptionPane.showMessageDialog(null, e.toString()); } } public Connection getConnection() { return conn; } public static DataInterface getInstance() { return dbint; } public static ResultSet getResultSet() { return rset; } public PreparedStatement setStatement(String a) throws SQLException{ PreparedStatement stmt = conn.prepareStatement(a); return stmt; }

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  • Mysql password hashing method old vs new

    - by The Disintegrator
    I'm trying to connect to a mysql server at dreamhost from a php scrip located in a server at slicehost (two different hosting companies). I need to do this so I can transfer new data at slicehost to dreamhost. Using a dump is not an option because the table structures are different and i only need to transfer a small subset of data (100-200 daily records) The problem is that I'm using the new MySQL Password Hashing method at slicehost, and dreamhost uses the old one, So i get $link = mysql_connect($mysqlHost, $mysqlUser, $mysqlPass, FALSE); Warning: mysql_connect() [function.mysql-connect]: OK packet 6 bytes shorter than expected Warning: mysql_connect() [function.mysql-connect]: mysqlnd cannot connect to MySQL 4.1+ using old authentication Warning: mysql_query() [function.mysql-query]: Access denied for user 'nodari'@'localhost' (using password: NO) facts: I need to continue using the new method at slicehost and i can't use an older php version/library The database is too big to transfer it every day with a dump Even if i did this, the tables have different structures I need to copy only a small subset of it, in a daily basis (only the changes of the day, 100-200 records) Since the tables are so different, i need to use php as a bridge to normalize the data Already googled it Already talked to both support stafs The more obvious option to me would be to start using the new MySQL Password Hashing method at dreamhost, but they will not change it and i'm not root so i can't do this myself. Any wild idea? By VolkerK sugestion: mysql> SET SESSION old_passwords=0; Query OK, 0 rows affected (0.01 sec) mysql> SELECT @@global.old_passwords,@@session.old_passwords, Length(PASSWORD('abc')); +------------------------+-------------------------+-------------------------+ | @@global.old_passwords | @@session.old_passwords | Length(PASSWORD('abc')) | +------------------------+-------------------------+-------------------------+ | 1 | 0 | 41 | +------------------------+-------------------------+-------------------------+ 1 row in set (0.00 sec) The obvious thing now would be run a mysql SET GLOBAL old_passwords=0; But i need SUPER privilege to do that and they wont give it to me if I run the query SET PASSWORD FOR 'nodari'@'HOSTNAME' = PASSWORD('new password'); I get the error ERROR 1044 (42000): Access denied for user 'nodari'@'67.205.0.0/255.255.192.0' to database 'mysql' I'm not root... The guy at dreamhost support insist saying thet the problem is at my end. But he said he will run any query I tell him since it's a private server. So, I need to tell this guy EXACTLY what to run. So, telling him to run SET SESSION old_passwords=0; SET GLOBAL old_passwords=0; SET PASSWORD FOR 'nodari'@'HOSTNAME' = PASSWORD('new password'); grant all privileges on *.* to nodari@HOSTNAME identified by 'new password'; would be a good start?

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  • Java .split() Method To Split XML Parameters

    - by Buzz Lightyear
    I have this line from an XML document: <?xml version="1.0" encoding="UTF-8"?> <svg xmlns:xlink="http://www.w3.org/1999/xlink" xmlns="http://www.w3.org/2000/svg" contentScriptType="text/ecmascript" width="1024" zoomAndPan="magnify" contentStyleType="text/css" viewBox="0 0 1024 768" height="768" preserveAspectRatio="xMidYMid meet" version="1.0"> I want to be able to split it up, using the split method. For example i want to save each parameter into a String array. So i'd like: contentScriptType="text/ecmascript" width="1024" zoomAndPan="magnify" contentStyleType="text/css" viewBox="0 0 1024 768" height="768" etc etc to be saved into a string array, is there anyway to do this using the split method, or can anybody suggest an easier, more efficient way to do this?

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  • How do the httppost, httpput etc attributes in ASP.NET MVC 2 work?

    - by Tomas Lycken
    In ASP.NET MVC 2, a couple of new action filter attributes were introduced, as "shorthand" for attributes in ASP.NET MVC 1; for example, applying the HttpPostAttribute does the same thing as applying [AcceptVerbs(HttpVerbs.Post)] to an action method. In addition, with the more verbose syntax, it is possible to combine different methods, in order to allow for example both Post and Delete. Now I'm wondering: how do the new attributes work? If I apply both [HttpPost] and [HttpDelete], will ASP.NET MVC 2 allow both or require both (thus allowing nothing)?

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  • Validate cyclic organization unit

    - by abmv
    I have a object Organization Unit and I have a self reference to it in the same object public class OrganizationUnit: IOrganizationUnit { private string fName; public string Name { get { return fName; } set { SetPropertyValue("Name", ref fName, (string) value); } } private OrganizationUnit fManagedBy; public IOrganizationUnit ManagedBy { get { return fManagedBy; } set { SetPropertyValue("ManagedBy", ref fManagedBy, (OrganizationUnit)value); } } } I need a method that will throw an exception if it finds a child organization unit in the third level is referencing a parent Organization unit, or to say cyclic parent organization. A is main B managed by A C

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  • Idiomatic ruby for temporary variables within a method

    - by Andrew Grimm
    Within a method, I am using i and j as temporary variables while calculating other variables. What is an idiomatic way of getting rid of i and j once they are no longer needed? Should I use blocks for this purpose? i = positions.first while nucleotide_at_position(i-1) == nucleotide_at_position(i) raise "Assumption violated" if i == 1 i -= 1 end first_nucleotide_position = i j = positions.last while nucleotide_at_position(j+1) == nucleotide_at_position(j) raise "Assumption violated" if j == sequence.length j += 1 end last_nucleotide_position = j Background: I'd like to get rid of i and j once they are no longer needed so that they aren't used by any other code in the method. Gives my code less opportunity to be wrong. I don't know the name of the concept - is it "encapsulation"? The closest concepts I can think of are (warning: links to TV Tropes - do not visit while working) Chekhov'sGun or YouHaveOutlivedYourUsefulness. Another alternative would be to put the code into their own methods, but that may detract from readability.

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  • Send instance method to module

    - by Matchu
    Given the following module, module Foo def bar :baz end end def send_to_foo(method) # ...? end send_to_foo(:bar) # => :baz What code should go in send_to_foo to make the last line work as expected? (send_to_foo is obviously not how I would implement this; it just makes clearer what I'm looking for.) I expected Foo.send(:bar) to work at first, but it makes sense that it doesn't. It would if the method were defined as def self.bar, but that's no fun.

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  • Objective-C: How to create a method that will return a UInt8 array from an int

    - by Adam
    I need to create an Objective-C method that converts an int into a byte array. In this instance, I can't use NSArray as a return type, it must be an UInt8 array. I've written a simple method to do this, but it has errors during compile and tells me that I have incompatible return types. Here is the code snippet. Any ideas? - (UInt8[])ConvertToBytes:(int) i { UInt8 *retVal[4]; retVal[0] = i >> 24; retVal[1] = i >> 16; retVal[2] = i >> 8; retVal[3] = i >> 0; return retVal; }

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  • Handling button click in ASP.NET MVC 2 RTM

    - by Leniel Macaferi
    I have a View in which the user is able to upload a file to the server. In this view I also have 2 buttons: one to Upload a file and other to Download the last file imported. In my Controller I created 2 action methods: Import and Export. How could I manage to redirect each button click to the proper action method in my Controller? I have tried Html.ActionLink: <%= Html.ActionLink("Upload", "Import", "OracleFile")%> <%= Html.ActionLink("Download", "Export", "OracleFile")%> Html.ActionLink didn't do the trick. The action links were taking me to the right Action methods but they were generating a GET request. This way Request.Files.Count = 0. I need a POST request.

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  • undefined method get with sinatra

    - by dorelal
    I have following code require 'rubygems' require 'sinatra' get '/' do 'Hello World!' end gem list sinatra *** LOCAL GEMS *** sinatra (1.0, 0.9.4) ruby -v ruby 1.8.7 (2009-06-12 patchlevel 174) [i686-darwin10.2.0] Error ruby myapp.rb ["==", "===", "=~", "__id__", "__send__", "class", "clone", "display", "dup", "enum_for", "eql?", "equal?", "extend", "freeze", "frozen?", "hash", "id", "include", "inspect", "instance_eval", "instance_exec", "instance_of?", "instance_variable_defined?", "instance_variable_get", "instance_variable_set", "instance_variables", "is_a?", "kind_of?", "method", "methods", "nil?", "object_id", "private", "private_methods", "protected_methods", "public", "public_methods", "respond_to?", "send", "singleton_methods", "taguri", "taguri=", "taint", "tainted?", "tap", "to_a", "to_enum", "to_s", "to_yaml", "to_yaml_properties", "to_yaml_style", "type", "untaint"] ./sinatra.rb:17: undefined method `get' for main:Object (NoMethodError) from /usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require' from /usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require' from myapp.rb:3

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  • Handling update errors in multiple records in the TClientDataset's ReconcileError method

    - by Fabio Gomes
    I'm trying to use the ReconcileError event to allow the user to correct the data after an update error which occurred in a specific record among others. Example: I have a dataset with one field and 3 records, this field have a unique constraint on the database, then I change one value to conflict when it reaches the database, then I call ApplyUpdates on the Dataset. This will generate an error (violation of unique constraint) in the provider and abort the applyupdates process, returning raAbort in the Action var of the ReconcileError method. In the ReconcileError method I tryied to use: Action := HandleReconcileError(aDataSet, UpdateKind, E); ** EDIT ** After debugging and dumping the DataSet records which were returned from the server, I noticed that there are 2 records in this Dataset, the first is the Old record and the second have all the changes I made to the first record. I'm a bit confused, will I always get this DataSet with 2 records? I thought that it should have only one record with the Old/New values. Thanks.

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  • jQuery .ajax method in IE7 & IE6 not working but working fine in Firefox

    - by RyanP13
    This relates to my previous post: http://stackoverflow.com/questions/2318696/jquery-load-method-causing-page-refresh-ajax I changed my implmentation to use the .ajax method instead of .load and it works fine in Firefox but not in IE7 or IE6: $('ul#coverTabs > li > a').live('click', function(event) { // Find href of current tab var $tabValue = $(this).attr('href'); $.ajax({ type: "GET", cache: false, dataType: "html", url: $(this).attr('href'), success: function(data){ $(data).find('.benefitWrap').each(function(){ var $benefitWrap = $(this).html(); $('.benefitWrap').replaceWith($('<div class="benefitWrap">' + $benefitWrap + '</div>')); }); } }); event.preventDefault(); }); This is killing me as it has taken ages to get this far. Any ideas where i am going wrong?

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  • Why won't my UISearchDisplayController fire the shouldReloadTableForSearchString method when I enter

    - by Gorgando
    I've been following Apple's TableSearch code example, but it's not working for me and I think I'm doing everything the same way they did it. The method below should be fired whenever the user types anything into the search box, but it never gets fired for me, just on the sample app. I have the appropriate @interface ContactsTableVC : UITableViewController { in the header file. I'm not sure what I'm missing or where else to look. My NSLog never gets called. Thanks for the help! - (BOOL)searchDisplayController:(UISearchDisplayController *)controller shouldReloadTableForSearchString:(NSString *)searchString searchScope:(NSInteger)searchOption { NSLog(@"The shouldreloadtableforsearchstring method has been called!"); [self filterContentForSearchText:searchString]; // Return YES to cause the search result table view to be reloaded. return YES; }

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  • Scala method where type of second parameter equals part of generic type from first parameter

    - by ifischer
    I want to create a specific generic method in Scala. It takes two parameters. The first is of the type of a generic Java Interface (it's from the JPA criteria query). It currently looks like this: def genericFind(attribute:SingularAttribute[Person, _], value:Object) { ... } // The Java Interface which is the type of the first parameter in my find-method: public interface SingularAttribute<X, T> extends Attribute<X, T>, Bindable<T> Now i want to achieve the following: value is currently of type java.lang.Object. But I want to make it more specific. Value has to be the of the same type as the placeholder "_" from the first parameter (and so represents the "T" in the Java interface). Is that somehow possible, and how? BTW Sorry for the stupid question title (any suggestions?)

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  • Upload file with POST method on Qt4

    - by mosg
    Hello! I'm looking for a basic code samples of how to upload files to server with HTTP POST method on Qt. My task: I have simple Qt program and I need to select any image file from the local host and upload it to the server. The selection part and GUI is simple and I have already done it, but with POST uploading I'm confused. In addition I have to say, that there is no authorization to upload file. If someone already looking this topic? PS: the reason why I'm asking and not coding my self is time, I need to get this method quick. Thank you, all success solutions from my side will be posted here for others.

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  • [Rails] Calling a method from a view using link_to_function

    - by Jeff
    Hello! I'm trying to have an image that when clicked associates the selected guideline to a project. I'm using link_to_function which somewhat behaves but I can not get the method I am calling in the link_to_function to redirect to another page. Is there a better way to do this? Below is a bit of my code. I can paste in additional parts if necessary: <% @guidelines.each do |guideline| %> <tr> <td align='center'><%= link_to_function image_tag("../../../images/icons/action_add.png"), add_guideline(guideline) %></td> <td><%=h guideline.title %></td> My GuidelinesController.helper method looks like this: def add_guideline(guideline) @project = Project.find(params[:project_id]) @project.guidelines << guideline @project.save redirect_to dashboard_path #doesn't work :( end

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  • Call methods in main method

    - by Niloo
    this is my main method that gets 3 integers from command line and I parse then in my validating method. However I have one operation method that calls 3 other methods, but i don't know what type of data and howmany I have to put in my operatinMethod() " cuase switch only gets one); AND also in my mainMethod() for calling the operationMehod(); itself? please let me know if i'm not clear? Thanx! main method: public class test { // Global Constants final static int MIN_NUMBER = 1; final static int MAX_PRIME = 10000; final static int MAX_FACTORIAL = 12; final static int MAX_LEAPYEAR = 4000; //Global Variables static int a,b,c; public static void main (String[] args) { for(int i =0; i< args.length; i++){} if(validateInput(args[0],args[1],args[2])){ performOperations(); } } //Validate User Input public static boolean validateInput(String num1,String num2,String num3){ boolean isValid = false; try{ try{ try{ a = Integer.parseInt(num1); if(!withinRange(a,MIN_NUMBER, MAX_PRIME)) { System.out.println("The entered value " + num1 +" is out of range [1 TO 10000]."); } isValid = true; } catch(Exception ex) { System.out.println("The entered value " + num1 + " is not a valid integer. Please try again."); } b = Integer.parseInt(num2); if(!withinRange(b,MIN_NUMBER, MAX_FACTORIAL)) { System.out.println("The entered value " + num2 +" is out of range [1 TO 12]."); } isValid = true; } catch(Exception ex) { System.out.println("The entered value " + num2 + " is not a valid integer. Please try again."); } c = Integer.parseInt(num3); if(!withinRange(c,MIN_NUMBER, MAX_LEAPYEAR)) { System.out.println("The entered value " + num3 +" is out of range [1 TO 4000]."); } isValid = true; } catch(Exception ex) { System.out.println("The entered value " + num3 + " is not a valid integer. Please try again."); } return isValid; } //Check the value within the specified range private static boolean withinRange(int userInput ,int min, int max){ boolean isInRange = true; if(userInput < min || userInput > max){ isInRange = false; } return isInRange; } //Perform operations private static void performOperations(int userInput) { switch(userInput) { case 1: // count Prime numbers countPrimes(a); break; case 2: // Calculate factorial getFactorial(b); break; case 3: // find Leap year isLeapYear(c); break; } } // Verify Prime Number private static boolean isPrime(int prime) { for(int i = 2; i <= Math.sqrt(prime) ; i++) { if ((prime % i) == 0) { return false; } } return true; } // Calculate Prime private static int countPrimes(int userInput){ int count =0; for(int i=userInput; i<=MAX_PRIME; i++) { if(isPrime(i)){ count++; } } System.out.println("Exactly "+ count + " prime numbers exist between "+ a + " and 10,000."); return count; } // Calculate the factorial value private static int getFactorial(int userInput){ int ans = userInput; if(userInput >1 ){ ans*= (getFactorial(userInput-1)); //System.out.println("The value of "+ b +"! is "+ getFactorial(userInput)); } return ans; } // Determine whether the integer represents a leap year private static boolean isLeapYear(int userInput){ if (userInput % 4 == 0 && userInput % 400 == 0 && userInput % 100 ==0){ System.out.println("The year "+ c +" is a leap year"); } else { System.out.println("The year "+ c +" is a not leap year"); } return false; } }

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  • struct method linking

    - by James
    I'm updating some old code that has several POD structs that were getting zero'd out by memset (don't blame me...I didn't write this part). Part of the update changed some of them to classes that use private internal pointers that are now getting wiped out by the memset. So I added a [non-virtual] reset() method to the various structs and refactored the code to call that instead. One particular struct developed an "undefined reference to `blah::reset()'" error. Changing it from a struct to a class fixed the error. Calling nm on the .o file h, the mangled function names for that method look the same (whether it's a class or a struct). I'm using g++ 4.4.1, on Ubuntu. I hate the thought that this might be a compiler/linker bug, but I'm not sure what else it could be. Am I missing some fundamental difference between structs and classes? I thought the only meaningful ones were the public/private defaults and the way everyone thinks about them.

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  • C# 4: conflicting overloaded methods with optional parameters

    - by Thomas
    I have two overloaded methods, one with an optional parameter. void foo(string a) { } void foo(string a, int b = 0) { } now I call: foo("abc"); interestingly the first overload is called. why not the second overload with optional value set to zero? To be honest, I would have expect the compiler to bring an error, at least a warning to avoid unintentional execution of the wrong method. What's the reason for this behaviour? Why did the C# team define it that way? Thanks for your opinions!

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  • .NET: will Random.Random operate differently inside a static method

    - by Craig Johnston
    I am having difficulty with the following code which is inside a static method of a non-static class. int iRand; int rand; rand = new Random((int)DateTime.Now.Ticks); iRand = rand.Next(50000); The iRand number, along with some other values, are being inserted into a new row of an Access MDB table via OLEDB. The iRand number is being inserted into a field that is part of the primary key, and the insert attempt is throwing the following exception even though the iRand number is supposed to be random: System.Data.OleDb.OleDbException: The changes you requested to the table were not successful because they would create duplicate values in the index, primary key, or relationship. Change the data in the field or fields that contain duplicate data, remove the index, or redefine the index to permit duplicate entries and try again. Could the fact the method is static be making the iRand number stay the same, for some reason?

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  • How to return variable datatypes from a method

    - by Praesagus
    I have a method whose callers require different datatypes. I could repeat the requisite conversions a dozen times by putting them in each of the callers, but it seems much more efficient to do it once in the called method. public String myMethod(String myArg) { return DoSomething(myArg); } public Int32 myMethod(String myArg) { return Convert.ToInt32(DoSomething(myArg)); } private String DoSomething(key) { return SomeList[key]; } If I have multiple methods that pull data from SomeList and have to utilize different data types then in each I have to do a type conversion. Examples might be session variables or query or form requests or any other number of things. In VB I could say Function myMethod(myArg as String) as Variant myMethod=DoSomething(myArg) End Function Sorry if the original post was not very clear. I hope this makes more sense. Thanks

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