Category: Programming

Programming Tips for JDBC

Programming Tips for JDBC  a. Use DataSource whenever Possible If you have a choice, you always should use javax.sql.DataSource to get a JDBC connection. Data sources, which were introduced with JDBC 2.0, make the job...

JavaScript DOs and DONTs

JavaScript DOs and DONTs   1.     Use Shortcut Notations:   This code [Avoid] Is the same as [Use Instead]   var lunch = new Array(); lunch[0]=’Dosa’; lunch[1]=’Roti’; lunch[2]=’Rice’; lunch[3]=’what the heck is this?’; var...

Tips on setting up a Junit test case

Do not use the test-case constructor to set up a test case [Junit]   Context:   Setting up a test case in the constructor is not a good idea. Consider: public class SomeTest extends...

Tips for Swing UI Layout

Tips for Swing UI Layout   1. Avoid using JEditorPane and JTextPane: Most Swing components in Java 6 have a meaningful baseline. However, some seem to have no correct baseline (for no apparent good...

Best Practices for Multithreading in Java

Best Practices for Multithreading in Java   1. Synchronization: If you have shared mutable data, synchronize access to it. Synchronization makes sure that an object is seen only in a consistent state by any...

Character encoding in Java

Character encoding in Java   Java iterates through all the characters that the string represents and turns each one into a number of bytes and finally put the bytes together. The rule that maps...

Arrays Usage Tips

‘Return zero-length arrays, not nulls’   Some APIs intentionally return a null reference to indicate that instances are unavailable. This practice can lead to denial-of-service vulnerabilities when the client code fails to explicitly handle...

Programming tips for Performance Improvement

  a. Always try to avoid generating garbage, because this will reduce the need to run a garbage collection. Just think about three things:         1.Reuse existing objects       2.Avoid creating unnecessary objects...