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Do not Allow Critical Data to be Serialized
by M S Sridhar
Language: Java, Expertise: Intermediate - Learn how to use the transient keyword for the variable that you do not want to be serialized.
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Testing for String Equality
by Octavia Anghel
Language: Java, Expertise: Beginner See an example of the best way to check for string equality.
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Making a File Read-only Using Java
by M S Sridhar
Language: Java, Expertise: Intermediate - Explore how the setReadOnly() method works in Java.
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JSF Backing Bean Tips: Parameter Extractions and Redirects
by Leonard Anghel
These two quick JSF bean backing tips show how to extract request parameters and redirect page loads.
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Java Code to Filter File Names in a Directory
by deniz mermerci
Using this Java code snippet, you can filter file names for array of extensions, split the file names, and test the resulting array.
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Managed Classes and Object Injection in Java EE 5
by Anghel Leonard
Get a quick reference for what types of managed class can inject what object in Java EE 5.
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Managing Concurrent Requests with EJB Containers
by Anghel Leonard
A limitation of EJB containers is that they can't serialize complex objects. Find out how the PrePassivate and PostActivate methods overcome this shortcoming.
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Using EJB Interceptors for Java EE Audits
by Leonard Anghel
With EJB interceptors, you can access the name, parameters, and EJB context of business methods.
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Java Tip: Optimization Technique for Lists
by Deepak Tyagi
An ArrayList that is not initialized with the proper size can slow your Java application's performance.
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Static Class Values Are Valid Even Without a Main Method
by Mannu Saini
This example shows how a static block can work even without a main method.
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Using Tree(Map,Set) in Collections
by Sivaranjani Duraisamy
To add objects to a Tree(Map, Set), implement the Comparable.compareTo method.
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A Guide to Determine When You Need a Java Interface
by Rajasekaran Kandhasamy
You definitely need an interface if your needs match either of the two scenarios discussed in this tip.
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Using String.split(String) vs. Using a StringTokenizer
by Hrudananda Pattanaik
It's not always safe to use String.split(String). Consider using the String Tokenizer API instead.
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Achieve Syntax Brevity with Anonymous Classes and Instance Initializers
by Abdul Salam
Shorten your code using these techniques.
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Execute DOS Commands from a Java Program
by Hrudananda Pattanaik
Use this tip to run DOS commands from your Java Program on Windows.
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Comparing Constant Strings with String Variables
by Ritesh Patel
Avoid NullPointerExceptions by comparing string constants with string variables—not the other way around.
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Understanding Java's Integer Pool Can Avoid Problems
by Shreyas Pai
When apparently-equal integer values fail an equality test, remember the integer pool.
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Returning Zero-Length Arrays in Java
by Nagaraj Ramesh
Define a static final zero-length array and return that rather than null from methods that return array types.
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Simple Script to Run Java Applications on Linux and Windows
by Bea Petrovicova
This simple script lets you run a Java application on both Linux and Windows.
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How to Detect JFrame Resizing
by Sterling Jordan
To know when a user is resizing a JFrame, catch the resize action using this tip's code.
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