Before vm initialization, all lot of system settings can be set.

because here need to call java method, so the return value will automatically be placed in the stack

* Constructor(Class<T> declaringClass, Class<?>[] parameterTypes, Class<?>[] checkedExceptions, int modifiers,

* Field(Class<?> declaringClass, String name, Class<?> type, int modifiers, int slot, String signature, byt

Clear the specified bit<br> -1: 11111111 11111111 111111111 111111111 @param i @param position @return

check to make sure the certs for the new class (certs) are the same as the certs for the first class inserted in the package (pcerts)

Given the month, day, and year, return which day of the week it falls on according to the Gregorian calendar. For month, use 1 for January, 2 for Fe

This method draws a pyramid of numbers.

This method draws a pyramid pattern using asterisk character. You can replace the asterisk with any other character to draw a pyramid of that.

Returns a class loaded by the bootstrap class loader; or return null if not found.

Finds the class with the specified <a href="#name">binary name</a>. This method should be overridden by class loader implementations that follow the d

* @throw java.lang.ClassNotFoundException */

Returns the absolute path name of a native library. The VM invokes this method to locate the native libraries that belong to classes loaded with this

Returns the class with the given <a href="#name">binary name</a> if this loader has been recorded by the Java virtual machine as an initiating loader

Finds the resource with the given name. Class loader implementations should override this method to specify where to find resources. @param name

Finds the resource with the specified name on the URL search path. @param name the name of the resource @return a {@code URL} for the resource, or {@

Returns an enumeration of {@link URL <tt>URL</tt>} objects representing all the resources with the given name. Class loader implementations should ove

Returns the lock object for class loading operations. For backward compatibility, the default implementation of this method behaves as follows. If thi

Returns the parent class loader for delegation. Some implementations may use <tt>null</tt> to represent the bootstrap class loader. This method will r

Find a resource of the specified name from the search path used to load classes. This method locates the resource through the system class loader (se

Returns {@code true} if the given class loader type is registered as parallel capable.

* Load class using user-defined class loader */

Creates a new instance of URLClassLoader for the specified URLs and parent class loader. If a security manager is installed, the {@code loadClass} met

* Should be called only by Run() method */

initialize static variables to default values: no need to execute code

read any attribute