了解 JAVA classloader

" "+b );
    new Baz( a, b );
    try {
      Class booClass = Class.forName( "Boo" );
      Object boo = booClass.newInstance();
    } catch( Exception e ) {
      e.printStackTrace();
    }
  }
}

baz/Baz.java
以下是 baz/Baz.java 的源代码

// $Id$
package baz;
public class Baz
{
  public Baz( String a, String b ) {
    System.out.println( "baz! "+a+" "+b );
  }
}

Boo.java
以下是 Boo.java 的源代码

// $Id$
public class Boo
{
  public Boo() {
    System.out.println( "Boo!" );
  }
}