DevX Tips Bank: Java

Do not Allow Critical Data to be Serialized

Language: Java, Expertise: Intermediate - Learn how to use the …

Testing for String Equality

Language: Java, Expertise: Beginner See an example of the best way to …

Making a File Read-only Using Java

Language: Java, Expertise: Intermediate - Explore how the …

JSF Backing Bean Tips: Parameter Extractions and Redirects

These two quick JSF bean backing tips show how to extract request parameters and redirect …

Java Code to Filter File Names in a Directory

Using this Java code snippet, you can filter file names for array of extensions, split the …

Managed Classes and Object Injection in Java EE 5

Get a quick reference for what types of managed class can inject what object in Java EE 5.

Managing Concurrent Requests with EJB Containers

A limitation of EJB containers is that they can't serialize complex objects. Find out how …

Using EJB Interceptors for Java EE Audits

With EJB interceptors, you can access the name, parameters, and EJB context of business …

Java Tip: Optimization Technique for Lists

An ArrayList that is not initialized with the proper size can slow your Java application's …

Static Class Values Are Valid Even Without a Main Method

This example shows how a static block can work even without a main method.

Using Tree(Map,Set) in Collections

To add objects to a Tree(Map, Set), implement the Comparable.compareTo method.

A Guide to Determine When You Need a Java Interface

You definitely need an interface if your needs match either of the two scenarios discussed …

Using String.split(String) vs. Using a StringTokenizer

It's not always safe to use String.split(String). Consider using the String …

Achieve Syntax Brevity with Anonymous Classes and Instance Initializers

Shorten your code using these techniques.

Execute DOS Commands from a Java Program

Use this tip to run DOS commands from your Java Program on Windows.