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#Download jprofiler eclipse plugin how to

If there is no sandbox security mechanism, this class will pollute the String in the system. As we all know, this class originally belongs to jdk.

Role: to prevent malicious pollution of Java source codeįor example, we define a package as java.lang, the class is String.

The core of Java security model is java sandbox Otherwise, load root > ext > app through the sub loader

Start the loader to check whether the current class can be loaded.

app (Application Loader) – > extension class loader – > root loader Delegate the request up to the parent class loader until the class loader is started.The class loader receives a request to load the class.Parental appointment mechanismįirst load the system class, because we are afraid to write our own class will replace the system class! No matter how many times you new, there is only one Car template 4. New Car is generated through a class template, and getClass is the same object (aClass1.getClassLoader().getParent().getParent()) The reason of getting classloader's grandfather - starting classloader - > null 1. Get the father of class loader - extclassloader\ ext.jar Get class loader - app loader AppClassLoader Start class (root) loader JRE / Lib\ rt.jar.Virtual machine is a software, used to execute a series of virtual computer instructions!

#Download jprofiler eclipse plugin how to

How to capture memory snapshot and analyze Dump file?.What are the common tuning parameters for the JVM?.What is OOM and what is stack overflow?.java8 virtual machine and previous changes / updates?.Please take the following questions to learn!