which class loader cexecutes first

hi
When the JVM is started, three class loaders are used[3] [4]:
1. Bootstrap class loader ----=====JDK internal classes, java.* packages.
2. Extensions class loader===========Loads jar files from JDK extensions directory
3. System class loader========== on java.class.path


what is the order of execution?????

Have a look here: Basics Of Java Class Loaders

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