FOR DEVELOPERS

Guide to the Basics of ClassLoader

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Soumyakanti Ray
Soumyakanti Ray is a writer, blogger, and SEO analyst with over nine years of experience. His work features in top publications like The Verge, India Today, and NDTV. He is a big-time foodie. He loves to play cricket, football, and video games in his free time.

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Frequently Asked Questions

Why do we use ClassLoader in Java?

A ClassLoader is an object that loads Java classes dynamically during runtime in order to stop JVM from being aware that ClassLoader is a component of the Java Runtime Environment. It helps to make JVM life simpler. JVM loads classes into memory whenever needed by the application and doesn't load them all at one time. ClassLoader comes into it and loads the classes in memory.

Is it possible to load a class by two ClassLoader?

A class is identified by its fully qualified name (package.classname). When the class is loaded into JVM it will have an entry for it as (package, classname, classloader). Therefore, the same class may be loaded twice by two different instances of ClassLoader.

What is a class loading error?

Errors of type java.lang.NoSuchMethodError indicates class loading errors. This error is usually caused by the classes in the JAR file in the emitter clashing with classes that are used by the application server.

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