Gets the system security interface. @return if a security manager has already been established for the current application, then that secur

* Create interned java.lang.String */

* This method is used to run a method and return value (even void method return a void value) */

* Always use current class's class loader to resolve class */

* arrayClassName is the full array class, not its component type */

start thread

** * Find field with its name and descriptor in the class hierarchy * Java doesn't permit a static and instance method with same name + signature *

Gets the system property indicated by the specified key. <p> First, if there is a security manager, its <code>checkPropertyAccess</code> method is cal

This way to build a tree is compatible with the leetcode Tree Node Visualizer <p>Print int the Leetcode way </p> @param arr @return

** * Find field with its name and descriptor in the class hierarchy * Java doesn't permit a static and instance field with same name + signature */

Only find its own defined method

Finds the resource with the given name. A resource is some data (images, audio, text, etc) that can be accessed by class code in a way that is indepe

invoke <clinit> to execute initialization code

jvms 5.4.3.1

Returns the system class loader for delegation. This is the default delegation parent for new <tt>ClassLoader</tt> instances, and is typically the cl

read all attributes for class, field or method or attribute