package com;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.IOException;

public class HelloClassLoader extends ClassLoader{

public static void main(String[] args) throws Exception {

Object o = new HelloClassLoader().findClass("com.Hello").newInstance();

}

@Override

protected Class<?> findClass(String name) throws ClassNotFoundException {

byte[] bytes = new byte[0];

try {

File file = new File("E:\\work_time\\HelloClassLoader\\src\\com\\Hello.xlass");

FileInputStream is = new FileInputStream(file);

int length = is.available();

bytes = new byte[length];

for (int i = 0;i<length;i++){

bytes[i]= (byte) (255 - bytes[i]);

}

is.read(bytes);

} catch (IOException e) {

e.printStackTrace();

}

return defineClass(name,bytes,0,bytes.length);

}

}