states.put("IL", "Illinois");
states.put("PA", "Pennsylvania");
states.put("GA", "Georgia");
states.put("AZ", "Arizona");
String stateName = (String) states.get( "il" );
System.out.println( "Value retrieved for 'il': " + stateName );
stateName = (String) states.get( "IL" );
System.out.println( "Value retrieved for 'IL': " + stateName );
stateName = (String) states.get( "iL" );
System.out.println( "Value retrieved for 'iL': " + stateName );