title: Javassist using a jar file
body: <p>How do I add a jar file to the search path for javassist and have it work correctly?  I am trying to modify a jar file without unjaring then rejaring.</p>
  
  <pre><code>import javassist.*;
  
  class Injector
  {
  
    public static void main(String[] argv) throws Exception
    {
      // Load the class representation
      ClassPool pool = ClassPool.getDefault();
      pool.insertClassPath( "myjarfile.jar" ); 
      CtClass cc = pool.get("org.mine.Myclass"); ////////// Not reading Myclass from myjarfile.jar
  
  
      // Find the method we want to patch and rename it 
      // (we will be creating a new method with the original name).
      CtMethod m_old = cc.getDeclaredMethod("methodToRename");
      // m_old.setName( "methodToRename" );
  
      cc.removeMethod( m_old );
  
  
    }
  }
  </code></pre>