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 ...
19 comments:

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:

How to Fix java.lang.OutOfMemoryError: GC overhead limit exceeded ? Example Solution

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The java.lang.OutOfMemoryError: GC overhead limit exceeded is another type of OutOfMemoryError in Java which comes when JVM spent too much...
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What is Assertion in Java - Java Assertion Tutorial Example

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Java Assertion or assert keyword in Java is a little unknown and not many programmers are familiar with this and it's been rarely us...
3 comments:

What is the use of java.lang.Class in Java? Example

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java.lang.Class is one of the most important classes in java but mostly overlooked by Java developers. It is very useful in the sense that ...
10 comments:

Java Mistake 1 - Using float and double for monetary or financial calculation Example

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Java is considered a very safe programming language compared to C and C++ as it doesn't have free() and malloc() to directly do memor...
19 comments:

Top 10 EJB Interview Question and Answer asked in Java J2EE Interviews

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10 EJB Interview Questions and Answer from my collection of interview questions. I have been sharing interview questions on various topic...
6 comments:

How to get and set default Character encoding or Charset in Java? Example

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D efault Character encoding in Java or charset is the character encoding used by JVM to convert bytes into String s or characters when y...
9 comments:
Monday, July 7, 2025

Difference between Class, Instance and Local variables in Java? Example

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There are a lot of differences between instance variable, class variable, and local variable in Java, and knowing them will help you to wr...
8 comments:

What is the Use of Interface in Java and Object Oriented Programming? [Answer]

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Many times, I have seen questions like why should we use an interface in Java? I f we can not define any concrete methods inside the interf...
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5 Benefits of using interface in Java and Object Oriented Programming

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Interface in Java is a simple concept but many programmers fail to realize their actual use, including me. When I started learni...

Difference between Abstraction and Encapsulation in Java? OOP Question Answer

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Both Abstraction and Encapsulation are two of the four basic OOP concepts which allow you to model real-world things into objects so that...
20 comments:

Difference between Association, Composition and Aggregation in Java, UML and Object Oriented Programming

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In Object-oriented programming, one object is related to another to use functionality and service provided by that object. This relationshi...
29 comments:

Why Default or No Argument Constructor is Important in Java Class? Answer

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Almost all Java developers know that compiler adds a default constructor or better known as a no-argument constructor in every Java class, ...
6 comments: