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- Do I need to set java JDK path in user variables or system variables . . .
Now I saw in javaTpoint tutorial that they were setting the path in user variables didn't create any JAVA_HOME variable So my question is what is the difference between the set path in user variables and system variables?
- What is the difference between spring factory-method and factory-bean?
It's basically the same difference between the Factory method and Factory design patterns, with a little note at the bottom While one is a method used to obtain instances of a specific class, the other is a full fledged object responsible of creating objects, including all of the required logic to do so FactoryBean 's interface documentation states: Interface to be implemented by objects
- What is the difference between JDK and JRE? - Stack Overflow
The JRE is the Java Runtime Environment It is a package of everything necessary to run a compiled Java program, including the Java Virtual Machine (JVM), the Java Class Library, the java command, and other infrastructure However, it cannot be used to create new programs The JDK is the Java Development Kit, the full-featured SDK for Java It has everything the JRE has, but also the compiler
- Whats the difference between map() and flatMap() methods in Java 8?
Both map and flatMap can be applied to a Stream<T> and they both return a Stream<R> The difference is that the map operation produces one output value for each input value, whereas the flatMap operation produces an arbitrary number (zero or more) values for each input value This is reflected in the arguments to each operation The map operation takes a Function, which is called for each
- how to fetch data from database in Hibernate - Stack Overflow
This is my class to fetch data from database package com javatpoint mypackage; import org hibernate Query; import org hibernate Session; import org hibernate
- Java : How to deal with multiple sessions in the servlet
Yes you can The servlet container will keep track of them for you, so you shouldn't have to do that bookkeeping yourself The Session object can be obtained from the HttpServletRequest in your servlet code Since your code only has to concern itself with a single request at a time, there's generally not much pain in dealing with multiple sessions
- How to generate a WAR file for a Java project without Maven or Eclipse
A WAR file is a ZIP file with filename suffix war and a specific internal structure as shown by the link szeak has given to you So compile your project, create an empty folder, copy all needed artefacts to that folder to their specific place according to the expected file structure and then use a packer tool or the jar tool to create the WAR file out of this Should be fairly easy
- What are the differences between NP, NP-Complete and NP-Hard?
What are the differences between NP, NP-Complete and NP-Hard? I am aware of many resources all over the web I'd like to read your explanations, and the reason is they might be different from what
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