40. exception chaining example

• A custom exception class that uses exception chaining:

  
      public class MyException extends Exception
      {
          public MyException()
          {
          }
  
          public MyException( Throwable cause )
          {
              super( cause );  
          }
      }
  
  

• Code that throws a MyException with chaining:

  
      catch ( IOException ex )
      {
          throw new MyException( ex );
      }
  
  
  

• Code that catches MyException and displays the cause:

  
      catch ( MyException ex )
      {
          System.out.println(
              "MyException: Application Error" );
          System.out.println( ex.getCause().toString() );
      }