Path: csiph.com!x330-a1.tempe.blueboxinc.net!usenet.pasdenom.info!aioe.org!.POSTED!not-for-mail From: Roedy Green Newsgroups: comp.lang.java.programmer Subject: Re: Abstract Class versus an Interface, when no Members in Common Date: Fri, 04 Nov 2011 15:17:18 -0700 Organization: Canadian Mind Products Lines: 19 Message-ID: <40p8b7ppdalk0athfnkt7vhti5vr41h050@4ax.com> References: <22857359-211e-443e-9c5d-6cc2f5bd971b@m19g2000vbm.googlegroups.com> Reply-To: Roedy Green NNTP-Posting-Host: Z2l1DcCELS0rATq8NqV4Sw.user.speranza.aioe.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Complaints-To: abuse@aioe.org X-Notice: Filtered by postfilter v. 0.8.2 X-Newsreader: Forte Agent 6.00/32.1186 Xref: x330-a1.tempe.blueboxinc.net comp.lang.java.programmer:9534 One my essays that gets more than its share of hits discuses when to use an abstract class and when an interface and when both. see http://mindprod.com/jgloss/interfacevsabstract.html -- Roedy Green Canadian Mind Products http://mindprod.com Capitalism has spurred the competition that makes CPUs faster and faster each year, but the focus on money makes software manufacturers do some peculiar things like deliberately leaving bugs and deficiencies in the software so they can soak the customers for upgrades later. Whether software is easy to use, or never loses data, when the company has a near monopoly, is almost irrelevant to profits, and therefore ignored. The manufacturer focuses on cheap gimicks like dancing paper clips to dazzle naive first-time buyers. The needs of existing experienced users are almost irrelevant. I see software rental as the best remedy.