Saturday, July 12, 2025

Enhanced For Loop Example and Puzzle in Java

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From Java 5 onwards, we have a for-each loop for iterating over collection and array in Java. For each loop allows you to traverse over col...
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JUnit4 Annotations : Test Examples and Tutorial

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JUnit4 Annotations are a single big change from JUnit 3 to JUnit 4 which is introduced in Java 5. With annotations creating and running ...
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JUnit Testing Tips - Constructor is Called Before Executing Test Methods? Example

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Even though almost all Java programmers either use JUnit or TestNG for their unit testing need along with some mock object generation libra...
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How to Fix Exception in thread "main" java.lang.NoClassDefFoundError: Running Java from Command line

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The "Exception in thread "main" java.lang.NoClassDefFoundError: helloworldapp/HelloWorldApp" error comes when you are ...
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How to fix java.io.NotSerializableException: org.apache.log4j.Logger Error in Java? Example

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java.io.NotSerializableException: org.apache.log4j.Logger error says that an instance of org.apache.lo4j.Logger is not Serializable. T...
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Binary Search vs Contains Performance in Java List - Example

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There are two ways to search an element in a List class, by using contains() method or by using Collections.binarySearch() method. There ...
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How to Fix Eclipse No Java Virtual Machine was found Windows JRE JDK 64 32 bit Error? Example

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One of my readers was installing Eclipse in his Windows 7 x86 machine and emailed me about this error " A java Runtime Environment (J...
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Private in Java: Why should you always keep fields and methods private? Example

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Making members private in Java is one of best coding practice . Private members (both fields and methods) are only accessible inside th...
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Friday, July 11, 2025

Introduction of How Android Works for Java Programmers

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Android development is a popular  buzz in the Java programming world. It's Android, which keeps Java at the forefront of the last cou...
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10 Essential UTF-8 and UTF-16 Character Encoding Concepts Every Programmer Should Learn

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Hello guys, if you want to learn about character encoding , particularly UTF-18 and UTF-16 , and looking for a good resource then you have c...

Top 5 Blogs Java EE developers should follow

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One reason for Java's great success as a programming language is that it has dominated the Enterprise space. Earlier J2EE used to be th...
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5 Entertaining Posts from StackOverFlow - Must Read

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StackOverFlow is great place to look for help, learn and participate, but it's also a great place to taste some real entertainment, con...
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Wednesday, July 9, 2025

5 Things Programmers Can Buy in Amazon Prime Day 2025 [Best Deals]

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Hello guys, many of my friends and colleagues used to wait until November to buy books, gadgets, and other computer items to get the huge di...

Tomcat – java.lang.OutOfMemoryError: PermGen space Cause and Solution

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Tomcat web serve r often suffers from java.lang.OutOfMemoryError: PermGen space whenever you deploy and un-deploy your web application a ...
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How to fix java.lang.classcastexception cannot be cast to in Java - cause and solution

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As name suggests ClassCastException in Java comes when we try to type cast an object and object is not of the type we are trying to cast ...
10 comments: