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<!DOCTYPE html> <html xmlns='http://www.w3.org/1999/xhtml' xmlns:b='http://www.google.com/2005/gml/b' xmlns:data='http://www.google.com/2005/gml/data' xmlns:expr='http://www.google.com/2005/gml/expr'> <head> <link href='https://www.blogger.com/static/v1/widgets/55013136-widget_css_bundle.css' rel='stylesheet' type='text/css'/> <meta content='text/html; charset=UTF-8' http-equiv='Content-Type'/> <meta content='blogger' name='generator'/> <link href='https://gafter.blogspot.com/favicon.ico' rel='icon' type='image/x-icon'/> <link href='http://gafter.blogspot.com/2007/02/' rel='canonical'/> <link rel="alternate" type="application/atom+xml" title="Neal Gafter's blog - Atom" href="https://gafter.blogspot.com/feeds/posts/default" /> <link rel="alternate" type="application/rss+xml" title="Neal Gafter's blog - RSS" href="https://gafter.blogspot.com/feeds/posts/default?alt=rss" /> <link rel="service.post" type="application/atom+xml" title="Neal Gafter's blog - Atom" href="https://www.blogger.com/feeds/7803021/posts/default" />  <meta content='http://gafter.blogspot.com/2007/02/' property='og:url'/> <meta content='Neal Gafter's blog' property='og:title'/> <meta content='Thoughts about Programming Languages, Science and Philosophy.' property='og:description'/> <title>Neal Gafter's blog: February 2007</title> <style id='page-skin-1' type='text/css'></style> <link href='https://www.blogger.com/dyn-css/authorization.css?targetBlogID=7803021&zx=4238dace-1d46-4395-b90f-635feeb84b51' media='none' onload='if(media!='all')media='all'' rel='stylesheet'/><noscript><link href='https://www.blogger.com/dyn-css/authorization.css?targetBlogID=7803021&zx=4238dace-1d46-4395-b90f-635feeb84b51' rel='stylesheet'/></noscript> <meta name='google-adsense-platform-account' content='ca-host-pub-1556223355139109'/> <meta name='google-adsense-platform-domain' content='blogspot.com'/> </head> <body> <div class='navbar section' id='navbar'><div class='widget Navbar' data-version='1' id='Navbar1'><script type="text/javascript"> function setAttributeOnload(object, attribute, val) { if(window.addEventListener) { window.addEventListener('load', function(){ object[attribute] = val; }, false); } else { window.attachEvent('onload', function(){ object[attribute] = val; }); } } </script> <div id="navbar-iframe-container"></div> <script type="text/javascript" src="https://apis.google.com/js/platform.js"></script> <script type="text/javascript"> gapi.load("gapi.iframes:gapi.iframes.style.bubble", function() { if (gapi.iframes && gapi.iframes.getContext) { gapi.iframes.getContext().openChild({ url: 'https://www.blogger.com/navbar/7803021?origin\x3dhttps://gafter.blogspot.com', where: document.getElementById("navbar-iframe-container"), id: "navbar-iframe" }); } }); </script><script type="text/javascript"> (function() { var script = document.createElement('script'); script.type = 'text/javascript'; script.src = '//pagead2.googlesyndication.com/pagead/js/google_top_exp.js'; var head = document.getElementsByTagName('head')[0]; if (head) { head.appendChild(script); }})(); </script> </div></div> <div id='outer-wrapper'><div id='wrap2'>  <span id='skiplinks' style='display:none;'> <a href='#main'>skip to main </a> | <a href='#sidebar'>skip to sidebar</a> </span> <div id='header-wrapper'> <div class='header section' id='header'><div class='widget Header' data-version='1' id='Header1'> <div id='header-inner'> <div class='titlewrapper'> <h1 class='title'> <a href='https://gafter.blogspot.com/'> Neal Gafter's blog </a> </h1> </div> <div class='descriptionwrapper'> <p class='description'><span>Thoughts about Programming Languages, Science and Philosophy.</span></p> </div> </div> </div></div> </div> <div id='content-wrapper'> <div id='main-wrapper'> <div class='main section' id='main'><div class='widget Blog' data-version='1' id='Blog1'> <div class='blog-posts hfeed'> <div class="date-outer"> <h2 class='date-header'><span>Monday, February 05, 2007</span></h2> <div class="date-posts"> <div class='post-outer'> <div class='post'> <a name='1935140630697961689'></a> <h3 class='post-title'> <a href='https://gafter.blogspot.com/2007/02/closures-spec-update-v05.html'>Closures Spec Update (v0.5)</a> </h3> <div class='post-header-line-1'></div> <div class='post-body'> <p><span style="font-style:italic;">This post discusses a draft proposal for adding support for closures to the Java programming language for the Dolphin (JDK 7) release. It was carefully designed to interoperate with the current idiom of one-method interfaces. The latest version of the proposal and a prototype can be found at <a href="http://www.javac.info/">http://www.javac.info/</a>.</span> <p>We've just updated the <a href="http://www.javac.info/">Closures for Java specification</a>, bringing it to v0.5. There are two significant changes:</p> <ol> <li>We've dropped the <em>nominal</em> version of the specification. We are no longer maintaining parallel versions of the specification (with and without function types) because the most significant concerns regarding function types were resolved in earlier revisions of the spec.</li> <li>We added support for user-defined looping APIs. I wrote about this in <a href="http://gafter.blogspot.com/2006/10/iterative-control-abstraction-user.html">October 2006</a>, but did not integrate that into the spec until now. </li> </ol> <p>There is now a <a href="http://video.google.com/videoplay?docid=4051253555018153503">two-hour version of my Closures for Java talk</a> on video. It is the same as the <a href="http://www.bejug.org/confluenceBeJUG/display/PARLEYS/Closures+for+Java">one-hour version</a> but with questions and answers both during and after the talk. </p></p> <div style='clear: both;'></div> </div> <div class='post-footer'> <p class='post-footer-line post-footer-line-1'><span class='post-comment-link'> <a class='comment-link' href='https://www.blogger.com/comment/fullpage/post/7803021/1935140630697961689' onclick=''>25 comments</a> </span> <span class='post-icons'> </span> <span class='post-backlinks post-comment-link'> </span> </p> <p class='post-footer-line post-footer-line-2'></p> <p class='post-footer-line post-footer-line-3'></p> </div> </div> </div> </div></div> </div> <div class='blog-pager' id='blog-pager'> <span id='blog-pager-newer-link'> <a class='blog-pager-newer-link' href='https://gafter.blogspot.com/search?updated-max=2007-03-16T16:39:00-07:00&max-results=2&reverse-paginate=true' id='Blog1_blog-pager-newer-link' title='Newer 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data-version='1' id='Profile1'> <h2>About Me</h2> <div class='widget-content'> <dl class='profile-datablock'> <dt class='profile-data'> <a class='profile-name-link g-profile' href='https://www.blogger.com/profile/08579466817032124881' rel='author' style='background-image: url(//www.blogger.com/img/logo-16.png);'> Neal Gafter </a> </dt> <dd class='profile-textblock'>Neal Gafter is a Computer Programming Language Designer and Implementer, Amateur Scientist and Philosopher. He works on the Rel compiler at Relational.AI. He previously worked for Microsoft on C#, for Google on Calendar, and for Sun Microsystems on Java. Neal was granted an OpenJDK Community Innovators' Challenge award for his design and implementation of lambda expressions for Java. He is coauthor of <em>Java Puzzlers: Traps, Pitfalls, and Corner Cases</em> (Addison Wesley, 2005). He was a member of the C++ Standards Committee and led the development of C and C++ compilers at Sun Microsystems, Microtec Research, and Texas Instruments. He holds a Ph.D. in computer science from the University of Rochester.</dd> </dl> <a class='profile-link' href='https://www.blogger.com/profile/08579466817032124881' rel='author'>View my complete profile</a> <div class='clear'></div> </div> </div></div> </div>  <div class='clear'> </div> </div>  <div id='footer-wrapper'> <div class='footer no-items section' id='footer'></div> </div> </div></div>  <script src="//www.google-analytics.com/urchin.js" type="text/javascript"> </script> <script type='text/javascript'> _uacct = "UA-605497-1"; urchinTracker(); </script> <script type="text/javascript" src="https://www.blogger.com/static/v1/widgets/2074308869-widgets.js"></script> <script type='text/javascript'> window['__wavt'] = 'AOuZoY79jjeQaR18F77BfioJEU79YmTp0Q:1743134913084';_WidgetManager._Init('//www.blogger.com/rearrange?blogID\x3d7803021','//gafter.blogspot.com/2007/02/','7803021'); _WidgetManager._SetDataContext([{'name': 'blog', 'data': {'blogId': '7803021', 'title': 'Neal Gafter\x27s blog', 'url': 'https://gafter.blogspot.com/2007/02/', 'canonicalUrl': 'http://gafter.blogspot.com/2007/02/', 'homepageUrl': 'https://gafter.blogspot.com/', 'searchUrl': 'https://gafter.blogspot.com/search', 'canonicalHomepageUrl': 'http://gafter.blogspot.com/', 'blogspotFaviconUrl': 'https://gafter.blogspot.com/favicon.ico', 'bloggerUrl': 'https://www.blogger.com', 'hasCustomDomain': false, 'httpsEnabled': true, 'enabledCommentProfileImages': true, 'gPlusViewType': 'FILTERED_POSTMOD', 'adultContent': false, 'analyticsAccountNumber': '', 'encoding': 'UTF-8', 'locale': 'en', 'localeUnderscoreDelimited': 'en', 'languageDirection': 'ltr', 'isPrivate': false, 'isMobile': false, 'isMobileRequest': false, 'mobileClass': '', 'isPrivateBlog': false, 'isDynamicViewsAvailable': false, 'feedLinks': '\x3clink rel\x3d\x22alternate\x22 type\x3d\x22application/atom+xml\x22 title\x3d\x22Neal Gafter\x26#39;s blog - 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