Differences among final, finally and finalize in Java is an important interview question. One reason being, these words sound similar and another is it gives an interviewer a chance to branch out to many other areas. From final you can go on to talk about inheritance or method overriding. From…
Robust code should be able to handle exceptional conditions too. In Java exception handling try and catch blocks are used to handle exceptions which helps in continuing with the flow of the program and also prevents the program from terminating automatically. In this post we’ll see details about try-catch block…
In this post we’ll see a new feature Multi-Catch exception added in Java 7. Using Multi-catch statement, single catch block can handle more than one type of exceptions. You don’t need to write multiple catch blocks to catch different exceptions where exception handling code is similar. Table of contents Prior…
This Java exception handling tutorial gives an overview of exception handling; what is the Java exception hierarchy, how to write exception handling code and the types of exceptions. When you write code you don’t just code the Happy path as it is only the half of the job. Robust code…
In the post dependency injection in Spring we have already gone through the concept of dependency injection, in this post we’ll see in details one of the type of dependency injection- Constructor dependency injection in Spring. For another type of dependency injection, Setter dependency injection check this post- Setter Dependency…
In the post dependency injection in Spring we have already gone through the concept of dependency injection, in this post we’ll see in details one of the type of dependency injection- Setter dependency injection in Spring. For another type of dependency injection, Constructor dependency injection check this post- Constructor Dependency…
This post shows what is dependency injection in Spring framework along with examples of injecting dependencies using XML configuration as well as using annotations. Table of contents What is dependency injection Dependency injection in Spring Spring dependency injection example with XML configuration Spring dependency injection example with annotations What is…
This post shows how to generate PDF from XML in Java using Apache FOP. Apache FOP Apache™ FOP (Formatting Objects Processor) is a print formatter driven by XSL formatting objects (XSL-FO) and an output independent formatter. It is a Java application that reads a formatting object (FO) tree and renders…
In this tutorial you’ll learn about the different summarizing collectors in Java Stream API that returns a summary statistics Collectors. Summarizing collectors in Collectors class There are three summarizing collector methods in Collectors class which are as following- summarizingInt(ToIntFunction<? super T> mapper)– Returns a Collector which applies an int-producing mapping…
If you are writing a Java program to generate random numbers two tried and tested ways are to either use Math.random() method or methods of Random class to get a random number but the limitation with these methods is that they generate a single random number and you would need…
