How NOT to reload .class files from the disk in CustomClassLoader for every creation of an instance

Question

I have created a CustomClassLoader that inherits from the ClassLoader to override loadClass method.

Below is the new CustomClassLoaded

    public class DesignFactoryClassLoader extends ClassLoader{

        public DesignFactoryClassLoader(ClassLoader parent) {
            super(parent);
        }

        public String classCanonicalName= null;

        public Class loadClass(String canonicalName) throws ClassNotFoundException {
             if(!this.classCanonicalName.equals(canonicalName))
                    return super.loadClass(canonicalName);
            try {                   

                    URL classLoadUrl = new URL(this.reloadClassUrl);
                    URLConnection connection = classLoadUrl.openConnection();
                     InputStream input = connection.getInputStream();
                     ByteArrayOutputStream buffer = new ByteArrayOutputStream();
                     int data = input.read();
                    int data = input.read();

                    while(data != -1){
                        buffer.write(data);
                        data = input.read();
                    }
                    input.close();
                    byte[] classData = buffer.toByteArray();

                    return defineClass(canonicalName,
                            classData, 0, classData.length);
                } catch (Exception e) {
                    //TODO Auto-generated catch block
                    e.printStackTrace();
                }
            return null;
          }
}

To reload a particular class from the disk this is how I do it

ClassLoader parentClassLoader = DesignFactory.class.getClassLoader();
DesignFactoryClassLoader designFactoryClassLoader = new DesignFactoryClassLoader(parentClassLoader);
designFactoryClassLoader.classCanonicalName = classCanonicalName;
Class reloadedCls = designFactoryClassLoader.loadClass(classCanonicalName);

The problem that I now have is: When I needed to create an instance of MyClass after the MyClass.class has been modified I created it using the CustomClassLoader and the .class file has been loaded into the customClassLoader. The second time I need to create an instance I will reload the .class file again from the disk with my logic. How can I avoid this?