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Tip Bank > Security > Java

Java

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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.
Testing for String Equality
by Octavia Anghel
Language: Java, Expertise: Beginner See an example of the best way to check for string equality.
Making a File Read-only Using Java
by M S Sridhar
Language: Java, Expertise: Intermediate - Explore how the setReadOnly() method works in Java.
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.
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.
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.
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.
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.
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.
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.
Using Tree(Map,Set) in Collections
by Sivaranjani Duraisamy
To add objects to a Tree(Map, Set), implement the Comparable.compareTo method.
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.
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.
Achieve Syntax Brevity with Anonymous Classes and Instance Initializers
by Abdul Salam
Shorten your code using these techniques.
Execute DOS Commands from a Java Program
by Hrudananda Pattanaik
Use this tip to run DOS commands from your Java Program on Windows.
Comparing Constant Strings with String Variables
by Ritesh Patel
Avoid NullPointerExceptions by comparing string constants with string variables—not the other way around.
Understanding Java's Integer Pool Can Avoid Problems
by Shreyas Pai
When apparently-equal integer values fail an equality test, remember the integer pool.
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.
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.
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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