### Source code for OldMacDonald.java:

>     public class OldMacDonald
>     {
>     	public void hadAFarm(Cow moo, Cow moomoo)
>     		throws EIEIOException
>     	{
>     		if (!moo.here() && !moo.there() && !moomoo.everywhere())
>     		{
>     			throw new EIEIOException("Trouble on the farm!");
>     		}
>     	}

>     	public static void main(String args[])
>     	{
>     		// Need some cows that fail.
>     		Cow cow1 = new Cow(false, false, false);
>     		Cow cow2 = new Cow(false, false, false);
>     		OldMacDonald farmer = new OldMacDonald();
>     		try
>     		{
>     			farmer.hadAFarm(cow1, cow2);
>     		}
>     		catch (EIEIOException ex)
>     		{
>     			System.out.println(ex);
>     			ex.printStackTrace();
>     			System.out.println("Better get some pigs.");
>     		}
>     	}
>     }

>     // Need a class with those method names!
>     class Cow
>     {
>     	private boolean here;
>     	private boolean there;
>     	private boolean everywhere;
>     	public Cow(boolean here, boolean there, boolean everywhere)
>     	{
>     		this.here = here;
>     		this.there = there;
>     		this.everywhere = everywhere;
>     	}

>     	public boolean here()
>     	{
>     		return here;
>     	}

>     	public boolean there()
>     	{
>     		return there;
>     	}

>     	public boolean everywhere()
>     	{
>     		return everywhere;
>     	}
>     }

### Output from OldMacDonald.java:

    EIEIOException: Trouble on the farm!
    EIEIOException: Trouble on the farm!
    	at java.lang.Throwable.fillInStackTrace(Native Method)
    	at java.lang.Throwable.(Throwable.java:94)
    	at java.lang.Exception.(Exception.java:42)
    	at java.io.IOException.(IOException.java:47)
    	at EIEIOException.(EIEIOException.java:10)
    	at OldMacDonald.hadAFarm(OldMacDonald.java:8)
    	at OldMacDonald.main(OldMacDonald.java:20)
    Better get some pigs.

--- Output Ends ---

#### NOTE:

You are reading previously generated output. You are not currently running the OldMacDonald application at the momement. You need to compile and run the source code first.

#### To run this program:

`
- javac OldMacDonald.java
- java OldMacDonald
`

Authors: Kevin Chu and Eric Brower
Copyright 2000 Prentice Hall PTR