JAVA Tutorial- Do's and Don'ts of Java programming

Dr Java Workshop – By Satyarth Gaur We will cover the following areas: - Top 10 mistakes made by Java programmers – How to avoid them - Core Java- Best Practices – This covers good and bad practices both - How to prepare for Java Interviews and Sun Java Exams

Top Ten Errors Java Programmers Make SATYARTH GAUR [email_address]

Accessing non-static member variables from static methods (such as main) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Contd.. ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Mistyping the name of a method when overriding ,[object Object]

Comparison assignment ( = rather than == ) ,[object Object]

Comparing two objects ( == instead of .equals) ,[object Object],[object Object],[object Object],[object Object],[object Object]

Confusion over passing by value, and passing by reference ,[object Object]

Writing blank exception handlers ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Forgetting that Java is zero-indexed ,[object Object]

Example Contd.. ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Preventing concurrent access to shared variables by threads ,[object Object]

Contd.. ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Capitalization errors ,[object Object],[object Object],[object Object]

Null pointers ,[object Object],[object Object]

Java Best Practices Java Fundamentals & Object-Oriented Programming Dr Java Boot Camp – Satyarth Gaur

Duplicate Code! ,[object Object],[object Object]

Accessible Fields ,[object Object],[object Object],[object Object],[object Object]

Using Magic Numbers ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Temporary Fields ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Initializing Strings with “new” ,[object Object],[object Object],[object Object],[object Object]

Using floats and doubles for currency calculations ,[object Object],[object Object],[object Object]

Returning null ,[object Object],[object Object],[object Object],[object Object]

Subclassing for Functionality ,[object Object],[object Object],[object Object],[object Object],[object Object]

Empty Catch Block ,[object Object]

Using Exceptions Unexceptionally ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Excessive Use of Switches ,[object Object],[object Object]

instanceof ,[object Object],[object Object],[object Object],[object Object],[object Object]

Static Methods ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

System.exit ,[object Object],[object Object]

Validate Your Parameters ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Create Defensive Copies ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Modify Strings with StringBuilder ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Favor Immutability ,[object Object],[object Object],[object Object]

Prefer “final” for Variables ,[object Object],[object Object]

Declare Variable Just Before Use ,[object Object]

Initialize Variables Whenever Possible ,[object Object],[object Object]

Follow Code Conventions ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Refer to Objects by Interfaces ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Consider Using Enums instead of Constants ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Close Your I/O Streams ,[object Object],[object Object]

Design Close to Domain ,[object Object],[object Object],[object Object],[object Object]

If You Override equals() Override hashcode() ,[object Object],[object Object]

Write Self-Documenting Code ,[object Object],[object Object],[object Object]

Use Javadoc Liberally ,[object Object]

Bubble-Up Exceptions ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Best Sites for Java Examples,Code Samples,Tutorials and Interview Preparation ,[object Object],[object Object],[object Object],[object Object]

Contd.. ,[object Object],[object Object],[object Object],[object Object],[object Object]

JAVA Tutorial- Do's and Don'ts of Java programming

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