In this article, we’ll discuss the main difference between an inner class and a static nested class in Java. From the Java Tutorial: Nested classes are divided into two categories: static …
What is the main difference between an inner class and a static nested class in Java? Learn MoreTechnically the correct answer is to label the outer loop. In practice if you want to exit at any point inside an inner loop then you would be better off …
How to break out of nested loops in Java? Learn MoreWhat is Java? Java is the high-level programming language that was developed by James Gosling in the year 1982. It is based on the principles of object-oriented programming and can …
Top Java Programming Interview Questions Learn MoreYou can do this: This is one of the suggested ways of implementing a generic collection in Effective Java; Item 26. No type errors, no need to cast the array repeatedly. However this …
How to create a generic array in Java? Learn MoreFor example: The toArray() method without passing any argument returns Object[]. So you have to pass an array as an argument, which will be filled with the data from the list and returned. …
How to convert an ArrayListFrom the community documentation: hibernate.hbm2ddl.auto Automatically validates or exports schema DDL to the database when the SessionFactory is created. With create-drop, the database schema will be dropped when the SessionFactory is …
What are the possible values of the Hibernate hbm2ddl.auto configuration and what do they do? Learn MoreThe instance initialiser is just syntactic sugar in this case, right? I don’t see why you need an extra anonymous class just to initialize. And it won’t work if the …
How can I initialize a static Map in Java? Learn MoreSample query: How would you initialise a static Map in Java? Method one: static initialiserMethod two: instance initialiser (anonymous subclass) or some other method? What are the pros and cons of each? …
How to initialize a static Map in Java? Learn MoreProblem statement: I have installed an application, when I try to run it (it’s an executable jar) nothing happens. When I run it from the commandline with: java -jar “app.jar” …
Can’t execute jar- file: “no main manifest attribute” | Java [Answered] Learn MoreSample query: I’m trying to install the Android SDK on my Windows 7 x64 System. jdk-6u23-windows-x64.exe is installed, but the Android SDK setup refuses to proceed because it doesn’t find the JDK installation. Is this …
Android SDK installation doesn’t find JDK? [Solved] Learn MoreThe org.json library is easy to use. Just remember (while casting or using methods like getJSONObject and getJSONArray) that in JSON notation [ … ] represents an array, so library will parse it to JSONArray { … …
How to parse JSON in Java? Learn MoreIn Java, the current working directory can be found using the following code: Code : This will print the absolute path of the current directory from where your application was …
How to get the current working directory in Java? Learn MoreUse the put() method to add elements to a HashMap in Java. In this post, we’ll learn more than just how to add elements to a HashMap in Java. How …
How to add elements to a hashmap in Java? Learn MoreQuery: My String contains only numbers, and I want to return the number it represents. For example, given the string “1234” the result should be the number 1234. In this post, I’ll convert …
How to convert a String to int in Java? Learn MoreQuery explained: Eclipse issues warnings when a serialVersionUID is missing. The serializable class Foo does not declare a static final serialVersionUID field of type long What is serialVersionUID and why is it important? Please …
What is serialVersionUID in Java? Learn MoreDependency injection means giving an object its instance variables. Really. That’s it. The best definition I’ve found so far is one by James Shore: “Dependency Injection” is a 25-dollar term for …
What is dependency injection? Learn MoreQuery: I’ve always been one to simply use: I use the interface as the type name for portability, so that when I ask questions such as these I can rework my …
What is the difference between ArrayList and LinkedList in Java? Learn More