I'm having a bit of a hard time articulating this problem. With different types, what considerations are there for how to organize methods that traverse the relationships to convert to a different type? While being forgiving about the precise modelli
This question already has an answer here: Read url to string in few lines of java code 8 answers Consider the following. val br = new BufferedReader(new FileReader(inputFileName)) But instead of a file, I want to read a file directly from the web, th
How can i check if one range from numbers is divided by more than one number. For example if it is only 1 divisor this will work , but i don't know what to do when i have an array from numbers : int limitNumber = 10; int onlyOneDivisor = 2; String in
i need to select checkbox which is having same ids HTML: <label class="table-checkbox-label" for="record-12034"> <input id="record-12034" class="table-checkbox" type="checkbox"/> </label>
Is it possible to do a cascade save in Section.class? I create Section object and add new questions without id. When I try save it I get error: org.postgresql.util.PSQLException: ERROR: insert or update on table "question_to_section" violates fo
Could anyone provide some guidance on how to use Table Value Parameters (TVP) with SQL Server JDBC? I am using the 6.0 version of the SQL Server driver provided by Microsoft, and I have reviewed the official documentation as well as the more helpful
Here is some code: public class Article { (...) private static int[] sImages = { R.drawable.ic_picture}; private ImageView mImage; public Article(int a) { mImage = sImages[a]; } In: mImage = sImages[a]; There is this error: Incompatible types Require
How can I assign SomeEnum1 or SomeEnum2 to an "enum" which implements SomeInterface? I can't just specify the interface directly as it's a class and not an enum. I'm sure there is a specify syntactic sugar to make this work but I can't figure it
I currently have this program read the contents of a text file and calculate the averages and amount of test scores taken and print them out neatly in a small data table. These are the names, amount of quizes taken and average of each student: James
I'm trying to find an integer inside of an int[] array and return true or false depending on whether or not it's present anywhere, however my code, which I've taken from numerous websites. My array is as follows: private static final int[] thirtyOneD
I am using ThreadPoolExecutor to manage the number of threads, I can catch the event of creating a new Thread for ThreadPool via ThreadFactory->newThread() But I do now know how to catch the event of killing Thread which stays idle for 2minutes as fo
I have an application that was working ok on JBOSS 6.0. Then I started using 6.2 by: copying the app .war file changing myy jboss_home env var copying the standalone.xml file from the 6.0 to the 6.2 I cannot start the app on the JBOSS 6.2. See server
I'm using Spring connecting to Sql Server 2008 R2 via JDBC. All I need is to insert a large amount of data to a table in the database as fast as possible. I'm wondering which way is better: Use Spring batch insert mention here Create stored procedure
I know that we can write main method in abstract class, but what we can achieve from it ? public abstract class Sample { public static void main(String args[]) { System.out.println("Abstract Class main method : "); } } We can not create the obje
I'm modifying someone else's Java code, learning Java as I go. :-). I'm writing hsqldb TEXT files, and I would like the final files to have a 'heading' row, so that they can be more easily understood as plain text. hsqldb has a switch 'ignore_first=t
I'm exploring the possibilities of Spring Boot right now, and I'm at a slight impasse. I want to be able to run two Spring Boot applications at once, both on the same server, but at different paths (one deploys on /, the other deploys at /another-pat
I am making a client socket connection with a hardware device. I am sending a command to this connection to be process by hardware. Now as a acknowledgment or as a reply, the hardware sends a response. The application sends a command to the connectio
I designed a jasper report using ireport designer in which I added logo image in the title of the report. This image is added from the hard coded path on the local machine. I need to add the logo image from my projects classpath. To do that I created
I made a small application with java in Eclipse using SWT for my GUI. I set up the project by installing SWT Designer, which is very similar to Swing Designer only for SWT. I created the project by going to File >> New >> Other >> Window
I have migrated from Linux (Ubuntu) to Mac OS. I have wrote an application in Java (swing). I have run it successfully the same code in windows and linux but in mac os I have some problems. Here is the code and problems in comments: public MainForm()
Is there any possibility to set unique ID for a thread? In distributed system where threads are created on many different machines (e.g. by RMI)? I need it to create log messages. From my research I know that it can be done using log4j mdc/ndc, but o
I am looking for any tip or guidance to develop an application like cam viewer. So i will see the live videos on my android application by using IP address and port. I searched this question but i could not find proper answer anywhere so please help
I created a class Person (as the book says) to hold the name and last name of a person entered from the keyboard and then there is another class PhoneNumber which encapsulates the country code, area code and the number of a person as a String. Person
I'd like to detect if a logo image in user's camera view - for example if the logo of StackOverflow was printed on a paper and viewed through camera. Or for less complicated approach let's say that I'd like to detect it in a bitmap. I'd like to recog
I need to design a JSF (or JSP) page where the text box vary dynamically based on key fields (fruits,Sweet, Biscuits ) . For example in a shop they have 3 product fruits (a,b,c), Biscuits (d,e) , Sweet s(f,g,h,I,j) if select Select Opption : Fruits |
I have written this Hibernate object DAO, however with this approach, it is using session per update approach (which I don't think it's right). The reason why I don't think its right because I am running into problems with my User class, which contai
As seen here my app gets shrinked on Samsung Galaxy Tab with Android 3.0 It is also shrinked in emulator, but at graphical layout it looks ok. main.xml: <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientat
Like for a object to be inserted into a HashMap the object should implement the equals() and the hashcode() method(not necessarily). Are there any special conditions for an object to be inserted in a TreeMap ?Unless a Comparator which mutually compar
I'm writing a Java application that's working with Apache Derby via JDBC. I'm having problems with the code in the following snippet: byte md5[] = md5sum(file); PreparedStatement s = con.prepareStatement("INSERT INTO input_files (job_ID, hash) SELECT
I'm building a Distributed System using Java RMI and it must support a server loss. If my client is connected to a Server using RMI, if this server goes down (cable problems for example), my client should get an exception so it can connect to other s
