package it.univr.draw; public final class O extends Letter { @Override protected String getRow(int num) throws IllegalArgumentException { switch (num) { case 0: return " "; case 2: case 3: case 4: case 5: case 6: return " * * "; case 1: case 7: return " ***** "; default: throw new IllegalArgumentException("row " + num + " does not exist in O"); } } }