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The chapter starts with several problems about dealing with null references. It continues with problems regarding checking indexes, \u003cstrong\u003eequals()\u003c/strong\u003e and \u003cstrong\u003ehashCode()\u003c/strong\u003e, and immutability (e.g., writing immutable classes, passing/returning mutable objects from immutable classes). The last part of the chapter deals with cloning objects and JDK 12 switch expressions.\u003c/p\u003e\n\u003c/article\u003e","errorMessage":null,"headerInfo":{"toc":[{"level":1,"text":"Objects, immutability and switch expressions","anchor":"objects-immutability-and-switch-expressions","htmlText":"Objects, immutability and switch expressions"}],"siteNavLoginPath":"/login?return_to=https%3A%2F%2Fgithub.com%2Frag7nayak%2FJava-Coding-Problems%2Ftree%2Fmaster%2FChapter02"}},"totalCount":24,"showBranchInfobar":true},"fileTree":{"":{"items":[{"name":"Chapter01","path":"Chapter01","contentType":"directory"},{"name":"Chapter02","path":"Chapter02","contentType":"directory"},{"name":"Chapter03","path":"Chapter03","contentType":"directory"},{"name":"Chapter04","path":"Chapter04","contentType":"directory"},{"name":"Chapter05","path":"Chapter05","contentType":"directory"},{"name":"Chapter06","path":"Chapter06","contentType":"directory"},{"name":"Chapter07","path":"Chapter07","contentType":"directory"},{"name":"Chapter08","path":"Chapter08","contentType":"directory"},{"name":"Chapter09","path":"Chapter09","contentType":"directory"},{"name":"Chapter10","path":"Chapter10","contentType":"directory"},{"name":"Chapter11","path":"Chapter11","contentType":"directory"},{"name":"Chapter12","path":"Chapter12","contentType":"directory"},{"name":"Chapter13","path":"Chapter13","contentType":"directory"},{"name":".gitignore","path":".gitignore","contentType":"file"},{"name":"LICENSE","path":"LICENSE","contentType":"file"},{"name":"README.md","path":"README.md","contentType":"file"}],"totalCount":16}},"fileTreeProcessingTime":7.36969,"foldersToFetch":[],"treeExpanded":true,"symbolsExpanded":false,"csrf_tokens":{"/rag7nayak/Java-Coding-Problems/branches":{"post":"E0gLAuZYQQJ9RuyKOsci8QzZGBMu1xt6HUAFpjujtm5UugSTzdzXdsH3ickl80lgX5AC3hs3cymdr7cuLW4v5Q"},"/rag7nayak/Java-Coding-Problems/branches/fetch_and_merge/master":{"post":"sYEKopD4uhc9iE9gQ23GhljN3z0sIS6l_sf2yZ_tgl944dAYQhJA3GvYvZV8wj-fBy5U-yaAfUOALJvVxyomPA"},"/rag7nayak/Java-Coding-Problems/branches/fetch_and_merge/master?discard_changes=true":{"post":"5SvxBLNz7EecLJGms6qbeP9C21DBTdfz71RgLpABbMUsSyu-YZkWjMp8Y1OMBWJhoKFQlsvshBWRvw0yyMbIpg"}}},"title":"Java-Coding-Problems/Chapter02 at master · rag7nayak/Java-Coding-Problems","appPayload":{"helpUrl":"https://docs.github.com","findFileWorkerPath":"/assets-cdn/worker/find-file-worker-7d7eb7c71814.js","findInFileWorkerPath":"/assets-cdn/worker/find-in-file-worker-1ae9fa256942.js","githubDevUrl":null,"enabled_features":{"code_nav_ui_events":false,"react_blob_overlay":false,"accessible_code_button":true,"github_models_repo_integration":false}}}
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