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5 Errors Which are Common in Java Programmers


Programming has emerged as a lucrative career option especially when online is becoming the mainstay for many businesses. When you learn Java programming, you add to your qualifications and become eligible for a good IT job.  Java is one of the most popular programming languages that is widely used for applications on all kinds of platforms including Mac, Windows, Android, and iOS.

What is Java and What are its Features?

Owned by Oracle Corp, the language has strong cross-platform support and standard libraries that can be used by programmers for reference. This object-oriented language is popular because of its Write Once, Run Anywhere capability and can be used for developing the highly popular Internet of Things or IoT.

Some major features of this language that students need to understand before joining a Java certification course are:

  • It is an easy-to-learn language that starts with the understanding of the basic concept of OOP Java.
  • It is a secure language that can be used to develop virus-free, tamper-free systems.
  • Its compiled code is executable on any processor which has the Java runtime system.
  • The language is architecture-neutral and has on implementation-dependent aspects of the specification thereby making it a portable language.
  • It emphasizes compile-time error checking and runtime checking.
  • It is multithreaded which means it can be used to write programs that can perform several tasks simultaneously.
  • It is designed for the distributed environment of the internet.
  • It is more dynamic than C or C ++ as it has been designed to adapt to an evolving environment. The Java programs include a lot of run-time information that can be used to verify and resolve accesses to objects at runtime.

Some Common Errors Made in Java Programming

Here we talk about some common errors that are made by programmers while doing Java programming.

  1. Accessing non-static members from the static methods: It is important to understand the difference between static and non-static while learning Java programming. And most learners take some time to understand the difference thereby making a mistake in accessing non-static members from the static methods.
  2. Missing break in switch case construct: New programmers often miss a break in the switch case construct. This does not cause compile errors but makes the code run wrongly.
  3. Confusion about 0 or 1 based index: The array index in Java is 0-based which means the first element in the array starts at the index 0 and the second at 1. However, some programmers treat the first element at index 1.
  4. Missing Closing Curly Braces: A common mistake made by many programmers is writing an opening curly brace but forgetting to put the closing one. The missing out could be due to improper indentation of the code or due to putting the open brace without closing it immediately.
  5. Ignoring Exceptions: Many beginners ignore or forget to write a code for handling exceptions. As long as there are no exceptions the code runs fine. But in case exceptions occur, the code can fall silently making it difficult to find the problem.

Many a times, Java programmers also forget to free resources after using them. Such common errors can be avoided through regular practice.