Hibernate Core Interfaces
Jan 8, 2015In Interview many times Interviewer ask a simple question "Hibernate core Interfaces ?".The five core interfaces exposed by Hibernate. But he not satisfy, Why?...
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Spring MVC3 With Hibernate
Oct 10, 2014My requirement is to display a table containing multiple rows and multiple columns. and row headers must be link type and that table should be retrieved dynamically from db where the values entered by the admin. this is the user view. and am new to spring. unable to implement this. my demo is on monday and i need to show the demo to survive in this job. I had given the link. but am unable to implement by seeing that also because it has no complete code which is my actual requirement. Code should be written in controllers, pojo, dao's, jsp's etc... URL....
In my code am unable to get in one table. So I went with alternative that to come each row and 3 columns in one table... 4 rows 4 different tables I did... but it was not my requirement. I used embedded to get that...in my pojo I wrote
@Embedded private BaseCost baseCost;
@Embedded private OtherCharges otherCharges;
@Embedded private PreferentialLocationalCharges preferentialLocationalCharges;
@Embedded private CarParking carParking;
and each embedded one i have created 4 pojo's where i wrote column headers. get it all in one table view with 4 row headers and 3 column headers but this is not my requirement...
Web Services :: Requested Resource Is Not Available Using Hibernate
Mar 23, 2015I don't seem to be hitting my RESTful webservices. I am using Hibernate and checked and all my entity classes are working. I've even retrieved data from the database but I cannot hit the web service. I am using Tomcat 7 and Eclipse IDE.
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>HibEx1</groupId>
<artifactId>HibEx1</artifactId>
[Code] .....
I have a web xml but there is really nothing in it. The url i am wanting to hit is [URL] ..... Is this a correct URL?
I also tried changing my Path to "/service" and that did not work either. I am getting a Http Status 404 "The requested resource is not available.
JSF :: Hibernate On Tomcat 7- UI Is Freezing After Uncertain Time
Jan 31, 2014Currently we are facing a problem in application developed in JSF, Hibernate on Tomcat server 7. The UI is getting freezed after uncertain time. Sometimes it worked for 2 to 5 hours and sometimes it hangs out within 10 mins, too.
Session time out in web.xml is -1
Before, we were getting memory leak logs in catalina, so we implemented ClassLoaderLeakPreventor in the application. When problem occurs, below log is printing in catalina.out.
INFO: Reloading context [/SHRWeb241213]
Jan 31, 2014 12:42:36 PM org.apache.catalina.core.StandardContext reload
INFO: Reloading Context with name [/SHRWeb241213] has started
ClassLoaderLeakPreventor: com.cosmos.leakPrevention.ClassLoaderLeakPreventor shutting down context by removing known leaks (CL: 0x19a37a)
ClassLoaderLeakPreventor: Removing 47 classes from Mojarra descriptors cache
[Code] ....
JSF :: View Layer And Handling Business Logic - Hibernate Without Spring
Jun 30, 2014I am going to develop a new web application of medium complexity. Right now i am somewhat comfortable with JSF and hibernate. I have never used JSF and hibernate together before.I just wanted to ask if it is good practice to use JSF (for both view layer and handling business logic) and hibernate(for persistence) without spring as a middle layer. The reason why i am asking this is i don't know anything about spring framework.
View Replies View RelatedJava Servlet :: Implementing JPA Hibernate Simple Application Using One To Many Relationship
May 8, 2012I am implementing JPA hibernate simple application using one to many relationship.
Relation ship is Comapny (1)----------- Department(*)
Company.java is as follow :
package com.web.pojo;
import java.util.ArrayList;
import java.util.List;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
[Code] .....
What I am doing is , I am adding new department to existing company. After execution above code
Table created are :
1. Company table with id and name
2. Department table with deptId , deptName , compId.
so at the time adding department , it does not threw any exception but updates records in department as
1(Id),Development(DeptName),null(compId) .
I am not getting why it is not updating compId column.
Null When Saving Or Updating Ticket Request On Flex With Java Hibernate
Nov 26, 2014users are trying saving or updating incident request on website they are able to see fault string =Java.lang.stackoverflow : null when saving or updating ticket request on flex with Java hibernate.
View Replies View RelatedCan Interfaces Be Instantiated
Feb 14, 2014Interfaces are 100 % abstract classes.They cannot be instantiated.Their sole purpose is to be implemented.So why does the following code works just fine while it is attempting to instantiate an interface.
interface TestA { String toString(); }
public class Test {
public static void main(String[] args) {
System.out.println(new TestA() {
public String toString() { return "test"; }});
}
}
Using Constructors In Interfaces?
Sep 1, 2014Can i use constructors in an interface?
interface AI {
public abstract AI();
public abstract void hello();
}
Output:
I got the error as the method AI() should have return type.
Interfaces In Java API
May 14, 2014I understand that interface methods are abstract. I don't understand what the methods in the API do if the method bodies are empty. For example, say there are two interfaces, both with one method with no parameters. What would make these two interfaces different from each other. In the API, the AudioClip interface has the methods play(), stop(), and loop(). If abstract methods have no method bodies, and these methods take no parameters, what makes them different from each other.
View Replies View RelatedJavaDocs Says Interfaces Cannot Have Fields?
May 20, 2014This is the link [URL] and it says One significant difference between classes and interfaces is that classes can have fields whereas interfaces cannot.How can this be possible?
View Replies View RelatedWhy Interfaces Are Needed In Java
Dec 5, 2014 why interfaces are needed in Java,Now you saw what a class must do to avail itself of the s... - justpaste.it (if I paste the quote here, I get the "Page not found" error after posting -.^)
the first fragment reads that the compiler must be sure that a method exits at a compile time, whereas the second fragment denies it - if a[i] doesn't have the specified compareTo method, a JVM simply throws an exception.
Abstract Classes And Interfaces
Mar 29, 2014 I did research again....
interface:
methods - abstract, default, static ONLY(abstract methods have no body, while static and defaults do, right?)
fields - public, static, final ONLY
abstract class: a normal class, but has at least one abstract method
methods - all
i.e., static, non-static, abstract (can it have a default method?)
fields - all
i.e., public, protected, private / final, non-final / static, non-static
Nesting Interfaces Inside Classes
Jun 20, 2014When are we allowed to nest interfaces inside a class? Would this be possible? Why or Why not?
View Replies View RelatedStatic Methods In Java Interfaces?
Jun 16, 2010Why can't we have static methods in an interface?
View Replies View RelatedClasses Of Object - Implement Two Out Of Three Interfaces
May 8, 2014I have three classes of object, most of which must implement two out of three interfaces. The interfaces look like this:
public interface Source {
public void startSending();
} public interface Sender {
public void setReceiver();
[Code] .....
That works fine, but I am wondering if pairing the interfaces into subinterfaces is a defensible methodology. For example, all classes that act like Producer must implement both the Source and Sender interfaces. And all classes that act like Relayer must implement the Sender and BlackHole interfaces. I could define two subinterfaces like this:
public interface Factory extends Source, Sender {
}
public interface Modifier extends BlackHole, Sender {
}
I could then define my classes like this:
public class Producer implements Factory {
}
public class Relayer implements Modifier {
}
public class Consumer implements BlackHole {
}
Within the class definitions, it makes no difference, as I will have to implement the same methods either way. But it seems more self-documentary to create the subinterfaces from their parent interfaces and name them in ways that reflect what the classes that implement them must actually do.
How To Simplify Classes By Using Interfaces And / Or Inheritance
Apr 6, 2014I am trying to figure out how I can most easily make it easier to make new types of units in my game. I have buildings and ships, and would like to know how I could make it easy to add new units. I have been recently told about interfaces, and have worked with inheritance a little bit.
What I would like to able to do is have it so that all of the variables and methods common to all ships could be stored in a superclass or interface, and same with the buildings. I would also like to be able to assign behaviours to the buildings and ships, maybe as interfaces, which could contain all of the methods and variables required for the functions of that ship or building.
For example, creating a new type of building that can shoot, build ships, and can regenerate nearby ships. So it would possible inherit all of the variables and methods common to all buildings, such as health, image, x, y, getX(), getY() etc. But it would then also gain the variables and methods essential for its functionality, such as shootRange, shoot(), regenRate, etc.
How could this best be achieved?
Why Static Classes Are Allowed In Interfaces
Oct 25, 2014I am reading about interface and i see that classes are allowed inside interfaces which are implicitly static. Here is sample of code i created and i am able to access the static method and fields as well. Here is the code snippet.
public class TestInnerClass {
public static void main(String[] args){
Test.NestedClass.printMe();
}
}
interface Test{
static class NestedClass{
static int x = 100 ;
public static void printMe(){
System.out.println(x);
}
}
}
My question is what is the use of such static classes inside interface? If i don't have access to Foo, i can't ever invoke NestedClass. Whats the design usage?
Interfaces Using Generic Type Constructions
Jan 16, 2014I want to make some library interfaces for a graph.Using these interfaces:
Graph<V,E>
Edge<E>
Vertex<V>
how can i constraint users of this library to use the same type <E> in the graph and edge interface and type <V> in the graph and vertex interface??
How Multiple Inheritance Is Possible In Java With Interfaces
Apr 11, 2014This is my assignment.
Identify how multiple inheritance is possible in Java with interfaces.
Write a java programme with appropriate classes to demonstrate the above.
Hint: both inheritance and interface concepts are necessary.
For the project name in netbeans, use your id and the name "assignment" separated by underscore,
E.g. 9876543_assignment
Implement Multiple Inheritance In Java Using Interfaces?
Jan 12, 2014how can i implement multiple inheritance in java using interfaces. if interfaces have some methods having same name then how to distinguish that ?
View Replies View RelatedRetrieve Image From MySQL DB And Display In Jtable If Image Type Is Medium Blob Using Swings And Hibernate
Jan 5, 2015I stored an image into MySQL database using swings and hibernate but I am struggling to retrieve that image from MySQL database and display same image in the jTable cell and same as on jLabel whatever I retrieve from the database using swings and hibernate .
View Replies View RelatedWhy Super Classes Always Declared As Interfaces And Not Abstract Class
Dec 1, 2014While reading the design patter book, i got one doubt ,There is a List an interface having sub classes ArrayList, LinkedList etc.,
Q1) My question is Why they declared the List as interface rather than Abstract class?
Q2) i read some site -
List l = new ArrayList(); Why it is GOOD line?
ArrayList l = new ArrayList() ; Why it is BAD line?
Answer required with detailed information for Q1 and Q2.
Casting And Interfaces - Comparing Object Of Unknown Types
Oct 15, 2014import java.util.*;
public class CommonElements
{
private int comparisons; // number of comparisons made
private Comparable[] arrayToSearch; // current array being traversed
private Comparable[] commonElements = new Comparable[10];
private int arrayPosition = 0; //keeps track of what index to add an element to common at
[Code] ...
I have trying to get this down to the bar minimum. I am trying to cast the desired object array to a array of comparable. This is all required by the assignment.
I am getting a runtime error that I can not perform the desired cast. What do I need to provide the compiler in order to allow for this casting. I can not change the signature of the method however nothing about the class has been specified do I need to implement comparable? Also I don not now what the client is passing so how would I write a generic compareTo method to compare object of unknown types.
Ambiguity When Implementing Multiple Interfaces With Same Method / Variable Names?
Oct 14, 2014imagine you are implementing 2 interfaces having identical method signatures:
interface A {
void doStuff();
}
interface B {
void doStuff();
[Code] ....
How can I implement both methods?
Or another example with member variables:
interface A {
public static final int i = 3;
}
interface B {
public static final int i = 33;
[Code] ....
How can I go about making clear which 'i' is meant?