PreparedStatement ps = con.createStatement("select * from table1 where last_name like ?"); ps.setString(1, "'%"+lastName+"'"); Will this work the same as... Statement s = con.createStatement("select * from table1 where last_name like %"+ lastName); Or does PreparedStatement strip out the % sign? ...
The root of our problem is Singletons. But Singletons are hard to break and in the meantime we have a lot of unit tests that use Singletons without being careful to completely clear them in the tearDown() method. If figure that a good way to detect tests like these is to look for memory leaks. If the memory used after tearDown() and S...
I was just wondering how i would let my java program continue running, but always be ready to take input. Right now i am using a bufferreader and reading in a line, but that makes my program halt and wait for input. I want the program to continue running but be ready to take input whenever needed, is there a way to do this? ...
I am new in Java so please be patient. It is common to map (convert) lists to lists. Some languages have a map method, some (C#) Select. How is this done with Java? Is a for loop the only option? I expect to be able to do something like this: List<Customer> customers = new ArrayList<Customer>(); ... List<CustomerDto> dtos = customers....
In Java, you can do the following : public interface IEngine{} public interface ICoolEngine extends IEngine{} public interface Car { IEngine getEngine(); } public interface ICoolCar extends ICar { @Override ICoolEngine getEngine(); } While this nicely solves a problem I've been grappling with, something about it "feels" wr...
Hello I want to be able to do some profiling to some app using the Netbeans Profiler API. I'm not intreseted in using Visual VM , but rather in programatically collecting data from the application[let's say CPU usage, and method execution times]. For instance, using CPU usage and hot methods. How to get that data and print it on console...
I have a custom implementation of the Map interface which does some fancy stuff, like lazy evaluation of functions. the implementation should appear immutable after construction from outside (e.g. no put() and putAll() methods are supported) I it looks like it works in the most basic conditions. Since it is quite complex, i am sure ther...
I'm working on a very large project that has associated class files in multiple directories, all stemming from the root dir \src. I'm trying to compile a file in src\solution\ (called Console.java) that uses imports from other directories in the src, which are still uncompiled. So if I want to compile Console.java outside of an IDE, ho...
I have implemented successfully the reflectionEquals method, with a list of excluded fields. return EqualsBuilder.reflectionEquals(this, obj, new String[] {"files", "notes", "status"}); However, I recently compiled my program on Java 1.5 and now I get the following error when the program hits the above line: java.lang.NoSuchMet...
I have absolutely no programming experience but need to learn Java - enough to take a J2ME fasttrack course. I only have 10 weeks. Can I do this? What's your advice about the best resources I can use ?(currently using Sun's Java Tutorials). ...
I'm writing a source-code editor in Java (for Java source code), and I'd like to add simple syntax highlighting (distinctive coloring for keywords would suffice). Any suggestions? ...
In Javascript, I have this function to display the current date on our page header: <SCRIPT language="Javascript"> var today = new Date(); document.write(today.toLocaleDateString()); </SCRIPT> I would like to do this via JSTL, but I'm not sure if it's possible. So far, I have this fragment of code: <jsp:useBean id="date" cla...
Hello I'm clearly in need of improving my knowledge in this Java field, or I'm doomed to produce "look the same but not exactly" code. I'm already have the bases... but I'm looking for a training / tuturial oriented only to this. Thanks ...
have this method call -> simpleJdbcTemplate.queryForInt(sql,null); -> queryForInt() method in the springs SimpleJdbcTemplate throws a DataAccessException which is a runtime exception. i want to propegate exceptions to the view tier of the application since Spring frame work Wraps Checked Exceptions inside RuntimeExceptions i ...
I have written a java axis2 1.4.1 web service and .net 3.5 WCF client and I am trying to catch the wsdl faults thrown. Unlike .net 2.0 the .net 3.5 claims to support wsdl:fault and the service reference wizard does generate all the correct fault classes in the client proxy. But when I try to catch a fault it doesn't seem to correctly s...
Basically I would like to have some dictionary that is an abstaction over legacy #define directives. I have an old header file that contains 6000+ defines, that are used as flag parametersome function and these defines denote one type of entity parameter. In C i have GetParameter(... , T_CTITLE, ...); In Java i would like to call...
I have a web application - deployed on Tomcat. It has two modules Module A and Module B Both have java code as well as UI component (struts\JSP etc.) Functionally, Module A is independent an doesn't depend upon Module B For ModuleA: We create a war for Module A and deploy it as ModuleA.war Now Module B depends upon Module A We so "me...
How can I create an InputStream object from a XML Document or Node object to be used in xstream? I need to replace the ??? with some meaningful code. Thanks. Document doc = getDocument(); InputStream is = ???; MyObject obj = (MyObject) xstream.fromXML(is); ...
File files[] = rootDir.listFiles(new FileFilter() { public boolean accept(File file) { if (file.isDirectory()) return true; String name = file.getName().toLowerCase(); if (name.endsWith(".zip") || name.endsWith(".jar") || name.endsWith(".z") || name.endsWith(".gz") || name.endsWith(".tar") || n...
I have not had much experience with Webservices or API's. We have a website built on Oracle->Sun App Server->Java->Struts2 framework. We have a requirement to provide an API for our system. This API will be used by other systems outside of our system. API is just for a simple SP that we have on our database. The other system does n...