How do I setup a basic OneToMany relationship using a List and get Hibernate JPA to manage the sequence index number of the list automagically? Can this be done? This is my test case (more or less); @Table(name="Policy_Root") public class PolicyRoot extends BaseDomainModel { private List<Policy> policyList = new ArrayList<Policy>(...
Hi, I'm trying to write a matrix into a text file. In order to do that I'd like to know how to write an array into a line in the text file. I'll give an example: int [] array = {1 2 3 4}; I want to have this array in text file in the format: 1 2 3 4 and not in the format: 1 2 3 4 Can you help me with that? Thanks a lot ...
I have very simple persistance.xml file: <?xml version="1.0" encoding="UTF-8"?> <persistence version="1.0" xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd">...
HashMap<String, int> doesn't seem to work but HashMap<String, Integer> does work. Any ideas why? ...
Hi, i try to store a string into an integer as follows: i read the characters of the string and every 4 characters i do this: val = (int) ch << 24 | (int) ch << 16 | (int) ch << 8 | (int) ch; Then i put the integer value in an array of integer that is called memory ( => int memory[16]). I would like to do it in an automatic way for ...
My program has essentially 3 steps: 1) Query Geocoder object for some Coordinates and store them in a Collection 2) Send the results to my main module for plotting on a map 3) Plot them on a google map widget I have created a Requestor class for the purpose of handling the Geocoding -- this class has a getResults() function that returns...
Can you provide a link for best or elegant MVC tutorial/example for JSP/Servlet? I am going to refactor a JSP based application. so I need a good reference or template to start with. I maybe not going to use any framework. ...
Is there a way to obtain the list of all table names in the database using Spring's SimpleJdbcTemplate? The database being queried is Oracle if that helps in any way. Thanks. ...
This code does returns null InputStream as well as null URL. Why is that? I have my own class that I want to get the actual .class file as an InputStream to serialize to bytes[]. Class clazz = String.class; String className = clazz.getName(); System.out.println(className); URL url = clazz.getResource(className); if( url != null ) { S...
Let's say I have a class like this (and also further assume that all the private variables: public class Item { private String _id = null; private String _name = null; private String _description = null; ... } Now, if I want to build a toString() representation of this class, I would do something like this inside ...
I'm writing a new Java 6 Swing application and want to have a "Show tips at start-up" feature. I've done this before, but never with localization in mind. In the past, my tips dialog used an XML file to hold the tips, but I'm afraid this will make things difficult when it comes time to translate these tips into different languages. I'v...
I was wondering how everyone re-uses android layouts and components? Do you do the old copy/paste the existing code into the project, or is there a way to include the layouts and components into a jar file for re-use? EDIT: For example if I have a list view, maybe I have another view that I am using for each list item in the listview, ...
If one has serialized the entire .class file into byte[], and assuming the name of the class is known (passed along with the byte[]), how do you convert byte[] -> Class -> then load it to the JVM so that I could later use it by calling the Class.forName()? NOTE: I'm doing this because I sent the .class over to another host, and the host...
so, i am really clutching at straws for ideas here. (also note: this is an intermittent problem) i have a 'parent' object with a collection of 'child' objects: <parent stuff> ... <set name="children" inverse="true" order-by="child_id"> <cache usage="read-write"/> <key column="parent_id"/> <on...
I'm looking for an API that would allow me to create an audio CD from within a C# application. The CDs are to be created and closed in the same session (no rewrite required). Basically, my application locates files on behalf of a user, and, if a blank CD is present in the drive, creates an audio CD for the user. If no CD is present, it c...
In Java for XML marshalling/unmarshalling one can use JAXB, JIBX, CASTOR, ADB etc. But out of these which is most generic & commonly used? Or is there any other utility available? ...
I have a menu with a few JCheckBoxMnuItems. How do I ensure that the Menu stays open until I have done all my selections (i.e. checked the menuitems) and does not close on just clicking one of them? ...
I've been working with JSP usebean, when I am trying to use bean in JSP, its throwing an exception that "It cannot find the class". But I've followed the correct structure, I assume, and included everything required. Please go through the code and let me know what could be the problem. //init.jsp -------- <%@ page import="com.wipro.uplo...
I have a textfield and a subreport in detail band. I pass the value to the subreport which displays details for the particular record. The problem is the textfield doesn't stretch when the subreport displays some value. Here is a part of my jrxml with detail band: <detail> <band height="40" isSplitAllowed="true" > <textField isS...
I have been trying to understand the internal implementation of java.util.HashMap and java.util.HashSet. Following are the doubts popping in my mind for a while: Whats is the importance of the @Override public int hashcode() in a HashMap/HashSet? Where is this hash code used internally? I have generally seen the key of the HashMap be ...