Javarevisited

The "Exception in thread "main" java.lang.NoClassDefFoundError: helloworldapp/HelloWorldApp" error comes when you are ...

java.io.NotSerializableException: org.apache.log4j.Logger error says that an instance of org.apache.lo4j.Logger is not Serializable. T...

One of my readers was installing Eclipse in his Windows 7 x86 machine and emailed me about this error " A java Runtime Environment (J...

Tomcat web serve r often suffers from java.lang.OutOfMemoryError: PermGen space whenever you deploy and un-deploy your web application a ...

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 ...

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

If you are coming from C background than there is a pleasant surprise for you, Java programming language provides implicit bound checks on ...

Sometimes we need to create custom Exceptions in Java, i.e. Exceptions which are not defined in JDK or any third-party library your applica...

You will always see some interview questions from Exception and Error handling in core Java Interviews. Exception handling is an important...

java.net.BindException: Address already in use: JVM_Bind is a common exception in Java with applications trying to connect on a particula...

Recently I was trying to run the Apache Tomcat server from the command prompt to test my Java web application on localhost, only to find th...

Error: Could not find or load main class HelloWorld comes when you are trying to run your Java program using java command with the main cl...

You are an enthusiastic Java programmer who just learned about developing Android apps in Java. To start with you have installed Android St...

We often hear advice that catching Throwable or Error is bad practice and Java developer should avoid catching these, but have you thought ...

The error ArrayIndexOutOfBoundsException : 1 means index 1 is invalid and it's out of bounding i.e. more than the length of the array...

If you are working in a Java web or enterprise application that connects to any other web server using HTTPS you might have seen the "...

While working with tibco rv for many years I found that Tibco errors are mysteriously difficult to diagnose for a newcomer and minor diffe...

In this blog post of the  FIX protocol tutorial series I would like to share my experience with connectivity issues around Fix Engines. t...

The error "java.sql.SQLException: No suitable driver found for jdbc:mysql://localhost:3306/test" occurs when you try to connect ...

"Failed to connect to queue manager" error comes in WebSphere MQ if any Client like a Java program is not able to connect to the...