Dynamically Reloading a Modified Class : ClassLoader « Reflection « Java






Dynamically Reloading a Modified Class

        

import java.io.File;
import java.net.URL;
import java.net.URLClassLoader;

class MyClass{
  public String myMethod() {
    return "a message";
  }
}

public class Main {
  public static void main(String[] argv) throws Exception {

    URL[] urls = null;

    File dir = new File(System.getProperty("user.dir") + File.separator + "dir" + File.separator);
    URL url = dir.toURI().toURL();
    urls = new URL[] { url };

    ClassLoader cl = new URLClassLoader(urls);

    Class cls = cl.loadClass("MyClass");

    MyClass myObj = (MyClass) cls.newInstance();

  }
}

   
    
    
    
    
    
    
    
  








Related examples in the same category

1.Determining from Where a Class Was Loaded
2.Loading a Class That Is Not on the Classpath
3.Get the path from where a class is loaded
4.Using the forName() method
5.Unqualified names
6.Return the context classloader.
7.Jar Class Loader
8.Zip Class Loader
9.Load class from Thread's ContextClassLoader, classloader of derived class or the system ClassLoader
10.Various Class Loader utilities
11.Load Class
12.Load classes
13.Class Finder
14.Class For Name
15.Context ClassLoader
16.Analyze ClassLoader hierarchy for any given object or class loader
17.A class loader which loads classes using a searchlist of other classloaders
18.Equivalently to invoking Thread.currentThread().getContextClassLoader().loadClass(className); but it supports primitive types and array classes of object types or primitive types.
19.A class to simplify access to resources through the classloader
20.Get a compatible constructor for the given value type
21.Force the given class to be loaded fully.
22.does Class Exist
23.Java interpreter replacement
24.Utility to essentially do Class forName and allow configurable Classloaders.
25.Attempts to list all the classes in the specified package as determined by the context class loader...
26.Resolve class and load class