{"id":17608,"date":"2025-04-09T06:47:27","date_gmt":"2025-04-09T03:47:27","guid":{"rendered":"https:\/\/fatihsoysal.com\/blog\/java-erisim-belirleyicileri-basitlestirilmis-anlatim\/"},"modified":"2025-04-09T06:47:27","modified_gmt":"2025-04-09T03:47:27","slug":"java-erisim-belirleyicileri-basitlestirilmis-anlatim","status":"publish","type":"post","link":"https:\/\/fatihsoysal.com\/blog\/java-erisim-belirleyicileri-basitlestirilmis-anlatim\/","title":{"rendered":"Java Eri\u015fim Belirleyicileri: Basitle\u015ftirilmi\u015f Anlat\u0131m"},"content":{"rendered":"<p><body><\/p>\n<p>Java Eri\u015fim Belirleyicileri: Basitle\u015ftirilmi\u015f Anlat\u0131m<\/p>\n<p>Merhaba!  Bu yaz\u0131da Java programlama dilinde s\u0131k\u00e7a kar\u015f\u0131la\u015ft\u0131\u011f\u0131n\u0131z ve bazen kafa kar\u0131\u015f\u0131kl\u0131\u011f\u0131na yol a\u00e7abilen eri\u015fim belirleyicilerini (access modifiers) detayl\u0131 ve anla\u015f\u0131l\u0131r bir \u015fekilde ele alaca\u011f\u0131z.  \u00d6ncelikle, eri\u015fim belirleyicilerinin ne i\u015fe yarad\u0131\u011f\u0131n\u0131 anlamak \u00f6nemlidir.  K\u0131saca \u00f6zetlemek gerekirse, bu belirleyiciler s\u0131n\u0131f \u00fcyelerine (alanlar ve metotlar) d\u0131\u015far\u0131dan eri\u015fimi kontrol etmenizi sa\u011flar.  Bu sayede kodunuzun g\u00fcvenli\u011fini ve d\u00fczenini art\u0131rabilirsiniz.  Peki, hangi eri\u015fim belirleyicileri var ve nas\u0131l \u00e7al\u0131\u015f\u0131rlar?<\/p>\n<h2>Eri\u015fim Belirleyicileri: public, private, protected ve varsay\u0131lan<\/h2>\n<p>Java&#8217;da d\u00f6rt farkl\u0131 eri\u015fim belirleyicisi kullan\u0131yoruz.  Bunlar; <code>public<\/code>, <code>private<\/code>, <code>protected<\/code> ve varsay\u0131lan (package-private) eri\u015fim belirleyicileridir.  \u015eimdi her birini ayr\u0131nt\u0131l\u0131 olarak inceleyelim.  Ancak \u00f6ncelikle temel bir kavram\u0131 a\u00e7\u0131kl\u0131\u011fa kavu\u015ftural\u0131m: eri\u015fim seviyesi.<\/p>\n<p>Eri\u015fim seviyesi, kodunuzun belirli bir par\u00e7as\u0131na eri\u015febilecek olan di\u011fer kod par\u00e7alar\u0131n\u0131 tan\u0131mlar.  Bu par\u00e7alar ayn\u0131 s\u0131n\u0131fta, ayn\u0131 pakette veya farkl\u0131 paketlerde olabilir.  \u0130\u015fte bu eri\u015fim seviyelerini kontrol eden mekanizmalar eri\u015fim belirleyicileridir.  Dolay\u0131s\u0131yla, do\u011fru eri\u015fim belirleyicisini se\u00e7mek, kodunuzun g\u00fcvenli\u011fi ve s\u00fcrd\u00fcr\u00fclebilirli\u011fi a\u00e7\u0131s\u0131ndan son derece \u00f6nemlidir.<\/p>\n<h3>public<\/h3>\n<p><code>public<\/code> eri\u015fim belirleyicisi, en geni\u015f eri\u015fim seviyesini sa\u011flar.  S\u0131n\u0131f \u00fcyenize, ayn\u0131 paket i\u00e7indeki veya farkl\u0131 paketlerdeki di\u011fer s\u0131n\u0131flardan da eri\u015filebilir.  \u00d6rne\u011fin, bir s\u0131n\u0131f\u0131n <code>public<\/code> bir metodu, di\u011fer t\u00fcm s\u0131n\u0131flardan \u00e7a\u011fr\u0131labilir.  Bu, genellikle genel ama\u00e7l\u0131 fonksiyonlar veya s\u0131n\u0131f\u0131n\u0131z\u0131n d\u0131\u015f d\u00fcnyaya sundu\u011fu aray\u00fczler i\u00e7in kullan\u0131l\u0131r.  Bu eri\u015fim seviyesi, dikkatli kullan\u0131lmas\u0131 gereken bir eri\u015fim belirleyicisidir, \u00e7\u00fcnk\u00fc a\u015f\u0131r\u0131 kullan\u0131m g\u00fcvenlik a\u00e7\u0131klar\u0131na yol a\u00e7abilir. Bir \u00f6rnek:<\/p>\n<pre><code>\npublic class MyClass {\n  public int publicVariable;\n  public void publicMethod() {\n    \/\/ ...\n  }\n}\n<\/code><\/pre>\n<h3>private<\/h3>\n<p><code>private<\/code> eri\u015fim belirleyicisi ise tam tersine en dar eri\u015fim seviyesini sa\u011flar.  Sadece tan\u0131mland\u0131\u011f\u0131 s\u0131n\u0131f i\u00e7indeki di\u011fer \u00fcyeler eri\u015febilir.  Bu, s\u0131n\u0131f\u0131n i\u00e7sel durumunu koruman\u0131z ve d\u0131\u015far\u0131dan m\u00fcdahaleyi engellemeniz i\u00e7in idealdir.  Kaps\u00fclleme prensibi, \u00f6zel verileri gizlemek i\u00e7in private eri\u015fim belirleyicisinin kullan\u0131m\u0131n\u0131 vurgular. \u00d6rnek:<\/p>\n<pre><code>\npublic class MyClass {\n  private int privateVariable;\n  private void privateMethod() {\n    \/\/ ...\n  }\n}\n<\/code><\/pre>\n<h3>protected<\/h3>\n<p><code>protected<\/code> eri\u015fim belirleyicisi ise <code>private<\/code> ve <code>public<\/code> aras\u0131nda bir orta yol sunar.  Ayn\u0131 paketteki di\u011fer s\u0131n\u0131flardan ve alt s\u0131n\u0131flardan eri\u015filebilir.  Farkl\u0131 bir paketteki di\u011fer s\u0131n\u0131flardan eri\u015filemez.  Bu, miras al\u0131nan s\u0131n\u0131flar\u0131n \u00fcyelerine eri\u015fim sa\u011flamak istedi\u011finiz, ancak ayn\u0131 zamanda eri\u015fimi s\u0131n\u0131rl\u0131 tutmak istedi\u011finiz durumlarda kullan\u0131\u015fl\u0131d\u0131r. \u0130\u015fte bir \u00f6rnek:<\/p>\n<pre><code>\npublic class MyClass {\n  protected int protectedVariable;\n  protected void protectedMethod() {\n    \/\/ ...\n  }\n}\n<\/code><\/pre>\n<h3>Varsay\u0131lan (Package-Private)<\/h3>\n<p>Hi\u00e7bir eri\u015fim belirleyicisi kullanmad\u0131\u011f\u0131n\u0131zda, varsay\u0131lan eri\u015fim seviyesi ge\u00e7erli olur.  Bu eri\u015fim seviyesi, ayn\u0131 paketteki di\u011fer s\u0131n\u0131flardan eri\u015filebilir ancak farkl\u0131 paketlerdeki s\u0131n\u0131flardan eri\u015filemez.  Bu, s\u0131kl\u0131kla i\u00e7sel s\u0131n\u0131f \u00fcyeleri i\u00e7in kullan\u0131l\u0131r.  Peki, neden bazen eri\u015fim belirleyicileri kullanmamay\u0131 tercih ederiz?<\/p>\n<p> Bazen, s\u0131n\u0131f\u0131n i\u00e7sel bile\u015fenlerinin di\u011fer s\u0131n\u0131flar taraf\u0131ndan do\u011frudan eri\u015fimini k\u0131s\u0131tlamak istemeyebilirsiniz, \u00f6zellikle de ayn\u0131 projede \u00e7al\u0131\u015fan s\u0131n\u0131flar aras\u0131nda. Bu durumda, varsay\u0131lan eri\u015fim belirleyici pratik bir \u00e7\u00f6z\u00fcm olabilir.  Ancak, kaps\u00fclleme ve g\u00fcvenlik prensiplerini her zaman g\u00f6z \u00f6n\u00fcnde bulundurmal\u0131s\u0131n\u0131z.<\/p>\n<h2>Sonu\u00e7<\/h2>\n<p>Eri\u015fim belirleyicileri, Java&#8217;da kodunuzun yap\u0131s\u0131n\u0131, g\u00fcvenli\u011fini ve d\u00fczenini sa\u011flamak i\u00e7in kritik \u00f6neme sahiptir.  Do\u011fru eri\u015fim belirleyicisini se\u00e7mek, kodunuzun daha anla\u015f\u0131l\u0131r, daha s\u00fcrd\u00fcr\u00fclebilir ve daha g\u00fcvenli olmas\u0131n\u0131 sa\u011flar.  Bu yaz\u0131da, d\u00f6rt farkl\u0131 eri\u015fim belirleyicisinin i\u015flevlerini a\u00e7\u0131klad\u0131k ve \u00f6rneklerle destekledik.  Umar\u0131m bu makale, Java eri\u015fim belirleyicileri hakk\u0131nda daha iyi bir anlay\u0131\u015f kazanman\u0131za yard\u0131mc\u0131 olmu\u015ftur.<\/p>\n<p>Daha fazla bilgi i\u00e7in <a href=\"https:\/\/fatihsoysal.com\">fatihsoysal.com<\/a>  sitesini ziyaret edebilirsiniz.<\/p>\n<p>Faydal\u0131 bulabilece\u011finiz di\u011fer kaynaklar:<\/p>\n<ul>\n<li><a href=\"https:\/\/docs.oracle.com\/javase\/tutorial\/java\/javaOO\/accesscontrol.html\">Oracle Java Dersleri &#8211; Eri\u015fim Kontrol\u00fc<\/a><\/li>\n<\/ul>\n<p>#Etiketler: Java, Eri\u015fim Belirleyicileri, Access Modifiers, public, private, protected, default, programlama, kod \u00f6rnekleri, kaps\u00fclleme<\/p>\n<p><\/body><br \/>\n<\/html><\/p>\n","protected":false},"excerpt":{"rendered":"Java Eri\u015fim Belirleyicileri: Basitle\u015ftirilmi\u015f Anlat\u0131m Merhaba! Bu yaz\u0131da Java programlama dilinde s\u0131k\u00e7a kar\u015f\u0131la\u015ft\u0131\u011f\u0131n\u0131z ve bazen kafa kar\u0131\u015f\u0131kl\u0131\u011f\u0131na yol&hellip;","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"csco_page_header_type":"","csco_page_load_nextpost":"","csco_page_subscribe_form":"","csco_page_contact_form":"","footnotes":""},"categories":[1],"tags":[],"class_list":{"0":"post-17608","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-genel","7":"cs-entry","8":"cs-video-wrap"},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v20.5 (Yoast SEO v25.3.1) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Java Eri\u015fim Belirleyicileri: Basitle\u015ftirilmi\u015f Anlat\u0131m<\/title>\n<meta name=\"description\" content=\"Merhaba! Bu yaz\u0131da Java programlama dilinde s\u0131k\u00e7a kar\u015f\u0131la\u015ft\u0131\u011f\u0131n\u0131z ve bazen kafa kar\u0131\u015f\u0131kl\u0131\u011f\u0131na yol a\u00e7abilen eri\u015fim belirleyicilerini (access modifiers) detayl\u0131 ve anla\u015f\u0131l\u0131r bir \u015fekilde ele alaca\u011f\u0131z. \u00d6ncelikle, eri\u015fim belirleyicilerinin ne i\u015fe yarad\u0131\u011f\u0131n\u0131 anlamak \u00f6nemlidir. K\u0131saca \u00f6zetlemek gerekirse, bu belirleyiciler s\u0131n\u0131f \u00fcyelerine (alanlar ve metotlar) d\u0131\u015far\u0131dan eri\u015fimi kontrol etmenizi sa\u011flar. Bu sayede kodunuzun g\u00fcvenli\u011fini ve d\u00fczenini art\u0131rabilirsiniz. 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Bu yaz\u0131da Java programlama dilinde s\u0131k\u00e7a kar\u015f\u0131la\u015ft\u0131\u011f\u0131n\u0131z ve bazen kafa kar\u0131\u015f\u0131kl\u0131\u011f\u0131na yol a\u00e7abilen eri\u015fim belirleyicilerini (access modifiers) detayl\u0131 ve anla\u015f\u0131l\u0131r bir \u015fekilde ele alaca\u011f\u0131z. \u00d6ncelikle, eri\u015fim belirleyicilerinin ne i\u015fe yarad\u0131\u011f\u0131n\u0131 anlamak \u00f6nemlidir. K\u0131saca \u00f6zetlemek gerekirse, bu belirleyiciler s\u0131n\u0131f \u00fcyelerine (alanlar ve metotlar) d\u0131\u015far\u0131dan eri\u015fimi kontrol etmenizi sa\u011flar. Bu sayede kodunuzun g\u00fcvenli\u011fini ve d\u00fczenini art\u0131rabilirsiniz. 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Bu yaz\u0131da Java programlama dilinde s\u0131k\u00e7a kar\u015f\u0131la\u015ft\u0131\u011f\u0131n\u0131z ve bazen kafa kar\u0131\u015f\u0131kl\u0131\u011f\u0131na yol a\u00e7abilen eri\u015fim belirleyicilerini (access modifiers) detayl\u0131 ve anla\u015f\u0131l\u0131r bir \u015fekilde ele alaca\u011f\u0131z. \u00d6ncelikle, eri\u015fim belirleyicilerinin ne i\u015fe yarad\u0131\u011f\u0131n\u0131 anlamak \u00f6nemlidir. K\u0131saca \u00f6zetlemek gerekirse, bu belirleyiciler s\u0131n\u0131f \u00fcyelerine (alanlar ve metotlar) d\u0131\u015far\u0131dan eri\u015fimi kontrol etmenizi sa\u011flar. Bu sayede kodunuzun g\u00fcvenli\u011fini ve d\u00fczenini art\u0131rabilirsiniz. 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