Key Area - Best Practices Archives

Blog Archives

10 Core Java Best Practices with an industry strength code sample

Best Practices is one of the key areas, and often you can impress your interviewers, peers, and code reviewers by applying the best practices to your code. If you are…

Members Only Content

…

5 Java unit testing interview Questions and Answers

Q1 Why use mock objects in unit testing? A1 Unit testing is widely accepted as a “best practice” for software development. When you write an object, you must also provide…

Members Only Content

…

9 Java Data structures best practices

#1: Choose the right type of Java data structure based on usage patterns

like fixed size or required to grow, duplicates allowed or not, ordering is required to be maintained or not, traversal is forward only or bi-directional, inserts at the end only or any arbitrary position, more inserts or more reads, concurrently accessed or not, modification is allowed or not, homogeneous or heterogeneous collection, etc.…

Can you list 10 JEE best practices from your experience?

Core Java best practices and JEE best practices can reveal a lot about your experience as a Java developer.

Q1. Can you list 10 JEE best practices from your experience?
A1.

#1: Using datasources with JNDI lookups

DataSources make the code more portable than using the DriverManagers. For the DriverManagers you need to tightly couple the details like host, port, username, password, and driver class to connect to a database with the code, and even externalizing those in a properties file doesn’t give you the flexibility that the JNDI lookup give by configuring the DataSources on the application server.…

How will you go about improving on the following Java code?

Q1. How will you go about improving on the following code snippet that calculates the new balance based on the current balance, total debits, and total credits? Note: All amounts…

Members Only Content

…

Top 5 Core Java Exceptions and best practices

#1: ConcurrentModificationException Getting a ConcurrentModificationException when trying to modify (i.e. adding or removing an item) a collection while iterating. The following code throws a ConcurrentModificationException.

List<T> list = getListOfItems();
for (Iterator<T> iter = list.iterator(); iter.hasNext(); ) {
  T obj = iter.next();
  if (obj.someCondition()) {
    list.remove(0); // ConcurrentModificationException
  }
}

List<T> list = getListOfItems();

for (Iterator<T> iter = list.

…

Blog Archives

10 Core Java Best Practices with an industry strength code sample

Members Only Content

5 Java unit testing interview Questions and Answers

Members Only Content

9 Java Data structures best practices

Can you list 10 JEE best practices from your experience?

#1: Using datasources with JNDI lookups

How will you go about improving on the following Java code?

Members Only Content

Top 5 Core Java Exceptions and best practices

800+ Java & Big Data Interview Q&As

200+ Java & Big Data Tutorials

Prepare to go places

Disclaimer