Java Programming Archives

January 7, 2019

Wrapping Exception

Java exceptions are language features used to deal with program failure. In this article, we will see one of the best practices of exception handling followed in the industry called “Exception wrapping” or “Exception funnelling”. Introduction Exception wrapping is when you catch an exception, wrap it in another exception and throw that exception. In the following section, we see both the...

Java Programming

December 24, 2018

Best practices for creating constants in Java

In this blog post I will explain you what are different and recommend ways of creating constants in Java. As we all know declaring constants is something common in all application. Lets see standard way of creating constants. Introduction Interfaces are adopted widely as constant repositories and it is one of the anti-patterns followed in Java. Such interfaces are called...

Java Programming

December 16, 2018

Apache Maven – Create a simple maven project

What is Apache Maven? Apache Maven is a software project management and comprehension tool. Based on the concept of a project object model (POM), Maven can manage a project’s build, reporting and documentation from a central piece of information. Key Features of Maven Simple project setup that follows best practices. Consistent usage across all projects. A large and growing repository...

Java Programming/Selenium/Software Testing

December 6, 2018

Difference between == and .equals() method in Java

The main difference between equals() method and “==” operator is, it is used to compare objects to check equality but with some of the differences. Difference between equals() and “==” equals() is a method whereas “==” is an operator. “==” operator when used for objects it is used to check if both objects point to the same memory location, whereas...

Java Programming/Selenium

March 2, 2017

Best practices to avoid NullPointerException

Call equals() and equalsIgnoreCase() method on known String Always call equals() method on known String which is not null. Since equals() method is symmetric, calling a.equals(b) is same as calling b.equals(a), and that’s why many programmer don’t pay attention on object a and b. One side effect of this call can result in NullPointerException, if caller is null. Prefer valueOf()...

Java Programming

July 28, 2016

Static Import to Shorten System.out.println()

Sometimes we feel System.out.println is a long statement to print. static import may shorten it a bit but it is not recommended, because it results in poor readability. I am just using this situation to explain static import and avoid using it in the below scenario.

Java Programming

July 28, 2016

Change out of System.out.println

out’ object can be customized. out gets initialized by java runtime environment at startup and it can be changed by developer during execution. Instead of standard output, in default cases when you run a program through command line, the output is printed in the same command window. We can change that behavior using setOut method as below. In the following...

Java Programming

July 28, 2016

What is System.out.println

System.out.println is a Java statement that prints the argument passed, into the System.out which is generally stdout. System – is a final class in java.lang package. As per javadoc, “…Among the facilities provided by the System class are standard input, standard output, and error output streams; access to externally defined properties and environment variables; a means of loading files and...

Java Programming

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Category: Java Programming

Wrapping Exception

Best practices for creating constants in Java

Apache Maven – Create a simple maven project

Difference between == and .equals() method in Java

Best practices to avoid NullPointerException

Static Import to Shorten System.out.println()

Change out of System.out.println

What is System.out.println