if ( enigma.getRollers().length < rollerId || rollerId <= 0 ) {
System.out.println( "Roller id not found" );
return;
}
Roller roller = enigma.getRollers()[rollerId - 1];
roller.rotateForward();
System.out.println( "Rotated Roller #" + rollerId + " - New Position: " + Letter.fromId( roller.getPosition() ) );
} else {
System.out.println( "Roller management" );
System.out.println( " roller info - Show information about current rollers" );
System.out.println( " roller reset - Reset all rollers to 0 (=A)" );