gistfile1.java

import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.lang.reflect.Method;

import com.xorinc.foo.Foo;



public class Main {

	public static void main(String... args) throws Exception{
		
		Foo.mash();
		
		InputStream classIn = new FileInputStream(new File("foo/Foo.class"));
		ByteArrayOutputStream bais = new ByteArrayOutputStream();
		
		Method define = ClassLoader.class.getDeclaredMethod("defineClass", String.class, byte[].class, int.class, int.class);
		define.setAccessible(true);
		
		while(true){
			
			int datum = classIn.read();
			
			if(datum == -1)
				break;
			
			bais.write(datum);

		}
		
		classIn.close();
		
		byte[] data = bais.toByteArray();
			
		define.invoke(ClassLoader.getSystemClassLoader(), "com.xorinc.foo.Foo", data, 0, data.length);
		
		Foo.mash();
	}
	
}