{"componentChunkName":"component---packages-blog-core-src-templates-post-js","path":"/string-fundamentals-in-java/","result":{"data":{"post":{"__typename":"MdxArticleProxy","id":"1a934f3e-39d5-531b-80c9-332223086367","title":"String fundamentals in Java","slug":"/string-fundamentals-in-java/","link":null,"excerpt":"What is a String? Observe the below picture for a good 10 seconds. Figure 1.1 What do you see? Lot…","timeToRead":1,"featured":null,"thumbnailText":null,"date":"May 09, 2020","category":{"__typename":"CategoriesJson","id":"9b34403c-9fbf-5755-b813-562840b22307","name":"Programming","slug":"/category/programming/","color":null,"icon":"/static/e4c25de42623633b3496afca3ce01e06/programming.svg"},"author":{"__typename":"AuthorsJson","id":"cb7eeca4-38c9-5674-90b7-7e96c482987b","name":"Arvind Pandey","slug":"/author/arvind-pandey/","title":"Software Engineer","description":"Specialized in Software Design, Development, and Engineering Leadership.","skills":["Javascript","React","Node.js"],"social":[{"name":"Github","url":"https://github.com/arvind3157"},{"name":"Twitter","url":"https://twitter.com/arvpande"},{"name":"Linkedin","url":"https://www.linkedin.com/in/arvpande/"}],"thumbnail":{"__typename":"ImageSharp","regular":{"width":150,"height":150,"src":"/static/1cf0ccf6c2ce94576dce6b324f5995d6/a9ab2/arvind-pandey.jpg","srcSet":"/static/1cf0ccf6c2ce94576dce6b324f5995d6/a9ab2/arvind-pandey.jpg 1x,\n/static/1cf0ccf6c2ce94576dce6b324f5995d6/3fb33/arvind-pandey.jpg 1.5x,\n/static/1cf0ccf6c2ce94576dce6b324f5995d6/d7080/arvind-pandey.jpg 2x","srcWebp":"/static/1cf0ccf6c2ce94576dce6b324f5995d6/a3d54/arvind-pandey.webp","srcSetWebp":"/static/1cf0ccf6c2ce94576dce6b324f5995d6/a3d54/arvind-pandey.webp 1x,\n/static/1cf0ccf6c2ce94576dce6b324f5995d6/cc134/arvind-pandey.webp 1.5x,\n/static/1cf0ccf6c2ce94576dce6b324f5995d6/3cb0e/arvind-pandey.webp 2x"}}},"body":"function _extends() { _extends = Object.assign || function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; }; return _extends.apply(this, arguments); }\n\nfunction _objectWithoutProperties(source, excluded) { if (source == null) return {}; var target = _objectWithoutPropertiesLoose(source, excluded); var key, i; if (Object.getOwnPropertySymbols) { var sourceSymbolKeys = Object.getOwnPropertySymbols(source); for (i = 0; i < sourceSymbolKeys.length; i++) { key = sourceSymbolKeys[i]; if (excluded.indexOf(key) >= 0) continue; if (!Object.prototype.propertyIsEnumerable.call(source, key)) continue; target[key] = source[key]; } } return target; }\n\nfunction _objectWithoutPropertiesLoose(source, excluded) { if (source == null) return {}; var target = {}; var sourceKeys = Object.keys(source); var key, i; for (i = 0; i < sourceKeys.length; i++) { key = sourceKeys[i]; if (excluded.indexOf(key) >= 0) continue; target[key] = source[key]; } return target; }\n\n/* @jsxRuntime classic */\n\n/* @jsx mdx */\nvar _frontmatter = {\n  \"title\": \"String fundamentals in Java\",\n  \"category\": \"Programming\",\n  \"author\": \"Arvind Pandey\",\n  \"date\": \"2020-05-09T00:00:00.000Z\",\n  \"tags\": [\"#ds\", \"#programming\", \"#java\"],\n  \"thumbnail\": \"cover.jpg\"\n};\nvar layoutProps = {\n  _frontmatter: _frontmatter\n};\nvar MDXLayout = \"wrapper\";\nreturn function MDXContent(_ref) {\n  var components = _ref.components,\n      props = _objectWithoutProperties(_ref, [\"components\"]);\n\n  return mdx(MDXLayout, _extends({}, layoutProps, props, {\n    components: components,\n    mdxType: \"MDXLayout\"\n  }), mdx(\"h4\", {\n    \"id\": \"what-is-a-string\"\n  }, \"What is a String?\"), mdx(\"p\", null, \"Observe the below picture for a good 10 seconds.\"), mdx(\"p\", null, mdx(\"figure\", _extends({\n    parentName: \"p\"\n  }, {\n    \"className\": \"gatsby-resp-image-figure\",\n    \"style\": {}\n  }), \"\\n    \", mdx(\"span\", _extends({\n    parentName: \"figure\"\n  }, {\n    \"className\": \"gatsby-resp-image-wrapper\",\n    \"style\": {\n      \"position\": \"relative\",\n      \"display\": \"block\",\n      \"marginLeft\": \"auto\",\n      \"marginRight\": \"auto\",\n      \"maxWidth\": \"298px\"\n    }\n  }), \"\\n      \", mdx(\"span\", _extends({\n    parentName: \"span\"\n  }, {\n    \"className\": \"gatsby-resp-image-background-image\",\n    \"style\": {\n      \"paddingBottom\": \"90.52631578947368%\",\n      \"position\": \"relative\",\n      \"bottom\": \"0\",\n      \"left\": \"0\",\n      \"backgroundImage\": \"url('data:image/png;base64,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')\",\n      \"backgroundSize\": \"cover\",\n      \"display\": \"block\"\n    }\n  })), \"\\n  \", mdx(\"img\", _extends({\n    parentName: \"span\"\n  }, {\n    \"className\": \"gatsby-resp-image-image\",\n    \"alt\": \"\\\"Char cloud\\\"\",\n    \"title\": \"\\\"Char cloud\\\"\",\n    \"src\": \"/static/e884e9318a9b5820e075837bafe2974e/1a525/chars.png\",\n    \"srcSet\": [\"/static/e884e9318a9b5820e075837bafe2974e/02569/chars.png 285w\", \"/static/e884e9318a9b5820e075837bafe2974e/1a525/chars.png 298w\"],\n    \"sizes\": \"(max-width: 298px) 100vw, 298px\",\n    \"style\": {\n      \"width\": \"100%\",\n      \"height\": \"100%\",\n      \"margin\": \"0\",\n      \"verticalAlign\": \"middle\",\n      \"position\": \"absolute\",\n      \"top\": \"0\",\n      \"left\": \"0\"\n    },\n    \"loading\": \"lazy\"\n  })), \"\\n    \"), \"\\n    \", mdx(\"figcaption\", _extends({\n    parentName: \"figure\"\n  }, {\n    \"className\": \"gatsby-resp-image-figcaption\"\n  }), \"\\\"Char cloud\\\"\"), \"\\n  \"), mdx(\"em\", {\n    parentName: \"p\"\n  }, \"Figure 1.1\")), mdx(\"p\", null, \"What do you see?\"), mdx(\"ol\", null, mdx(\"li\", {\n    parentName: \"ol\"\n  }, \"Lot of characters?\"), mdx(\"li\", {\n    parentName: \"ol\"\n  }, \"Do you see any meaning in them? hmmm for some character yes.\")), mdx(\"p\", null, \"Next game. Now, let\\u2019s arrange those characters in such a way that it becomes \", mdx(\"strong\", {\n    parentName: \"p\"\n  }, \"arvind\"), \". What? Yes, you get my name.\"), mdx(\"p\", null, \"Let\\u2019s arrange in such a way that it becomes \", mdx(\"strong\", {\n    parentName: \"p\"\n  }, \"darvin\"), \", may be someone else\\u2019s name.\"), mdx(\"p\", null, \"Anyway, thanks for playing.\"), mdx(\"p\", null, \"WTF is your point Arvind?\"), mdx(\"p\", null, \"My point is, when you arrange characters in certain way they become more meaninful. When you put together those characters they are also called \", mdx(\"strong\", {\n    parentName: \"p\"\n  }, \"String\"), \" in some world. They does not need to be meaningful though.\\nBut let\\u2019s not fail to define formal definition of String.\"), mdx(\"p\", null, \"Array of characters is called \", mdx(\"strong\", {\n    parentName: \"p\"\n  }, \"String\"), \".\"), mdx(\"h4\", {\n    \"id\": \"how-to-create-string-in-java\"\n  }, \"How to create String in Java\"), mdx(\"p\", null, \"This is how one can create String in Java.\"), mdx(\"pre\", null, mdx(\"code\", _extends({\n    parentName: \"pre\"\n  }, {\n    \"className\": \"language-java\"\n  }), \"String name = \\\"arvind\\\";\\n\")), mdx(\"p\", null, \"There is another way to create String using \", mdx(\"strong\", {\n    parentName: \"p\"\n  }, \"new\"), \" keyword.\"), mdx(\"pre\", null, mdx(\"code\", _extends({\n    parentName: \"pre\"\n  }, {\n    \"className\": \"language-java\"\n  }), \"String name = new String(\\\"arvind\\\");\\n\")), mdx(\"h4\", {\n    \"id\": \"important-methods-and-fields-in-string\"\n  }, \"Important methods and fields in String\"), mdx(\"p\", null, \"When working with String, it\\u2019s good to know some inbuilt methods and fields that would come handy when wrting code.\"), mdx(\"ol\", null, mdx(\"li\", {\n    parentName: \"ol\"\n  }, mdx(\"strong\", {\n    parentName: \"li\"\n  }, \"length()\"), \" returns length of the string\")), mdx(\"pre\", null, mdx(\"code\", _extends({\n    parentName: \"pre\"\n  }, {\n    \"className\": \"language-java\"\n  }), \"String name = \\\"arvind\\\";\\nSystem.out.println(name.length()); // Prints => 6\\n\")), mdx(\"ol\", {\n    \"start\": 2\n  }, mdx(\"li\", {\n    parentName: \"ol\"\n  }, mdx(\"strong\", {\n    parentName: \"li\"\n  }, \"charAt(int i)\"), \" return character at the index i\")), mdx(\"pre\", null, mdx(\"code\", _extends({\n    parentName: \"pre\"\n  }, {\n    \"className\": \"language-java\"\n  }), \"String name = \\\"arvind\\\";\\nSystem.out.println(name.charAt(0)); // Prints => a\\n\")), mdx(\"ol\", {\n    \"start\": 3\n  }, mdx(\"li\", {\n    parentName: \"ol\"\n  }, mdx(\"strong\", {\n    parentName: \"li\"\n  }, \"concat(String s)\"), \" concat the string s\")), mdx(\"pre\", null, mdx(\"code\", _extends({\n    parentName: \"pre\"\n  }, {\n    \"className\": \"language-java\"\n  }), \"String name = \\\"arvind\\\";\\nString fullName = name.concat(\\\" pandey\\\");\\nSystem.out.println(fullName);  // Prints => arvind pandey\\n\")), mdx(\"ol\", {\n    \"start\": 4\n  }, mdx(\"li\", {\n    parentName: \"ol\"\n  }, mdx(\"strong\", {\n    parentName: \"li\"\n  }, \"toCharArray()\"), \" convert string to character array\")), mdx(\"pre\", null, mdx(\"code\", _extends({\n    parentName: \"pre\"\n  }, {\n    \"className\": \"language-java\"\n  }), \"String name = \\\"arvind\\\";\\nchar[] nameArr = name.toCharArray();  // Converts to char array\\n\")), mdx(\"ol\", {\n    \"start\": 5\n  }, mdx(\"li\", {\n    parentName: \"ol\"\n  }, mdx(\"strong\", {\n    parentName: \"li\"\n  }, \"codePointAt(int i)\"), \" the code point value of the character at the index i\")), mdx(\"pre\", null, mdx(\"code\", _extends({\n    parentName: \"pre\"\n  }, {\n    \"className\": \"language-java\"\n  }), \"String name = \\\"arvind\\\";\\nSystem.out.println(name.codePointAt(0));  // Prints => 97\\n\")), mdx(\"ol\", {\n    \"start\": 6\n  }, mdx(\"li\", {\n    parentName: \"ol\"\n  }, mdx(\"strong\", {\n    parentName: \"li\"\n  }, \"contains(String s)\"), \" true if this string contains s, false otherwise\")), mdx(\"pre\", null, mdx(\"code\", _extends({\n    parentName: \"pre\"\n  }, {\n    \"className\": \"language-java\"\n  }), \"String name = \\\"arvind\\\";\\nSystem.out.println(name.contains(\\\"a\\\")); // Prints => true\\nSystem.out.println(name.contains(\\\"b\\\")); // Prints => false\\n\")), mdx(\"ol\", {\n    \"start\": 7\n  }, mdx(\"li\", {\n    parentName: \"ol\"\n  }, mdx(\"strong\", {\n    parentName: \"li\"\n  }, \"toUpperCase()\"), \" the String, converted to uppercase\")), mdx(\"pre\", null, mdx(\"code\", _extends({\n    parentName: \"pre\"\n  }, {\n    \"className\": \"language-java\"\n  }), \"String name = \\\"arvind\\\";\\nSystem.out.println(name.toUpperCase());  // Prints => ARVIND\\n\")), mdx(\"ol\", {\n    \"start\": 8\n  }, mdx(\"li\", {\n    parentName: \"ol\"\n  }, mdx(\"strong\", {\n    parentName: \"li\"\n  }, \"toLowerCase()\"), \" the String, converted to lowercase\")), mdx(\"pre\", null, mdx(\"code\", _extends({\n    parentName: \"pre\"\n  }, {\n    \"className\": \"language-java\"\n  }), \"String name = \\\"Arvind Pandey\\\";\\nSystem.out.println(name.toLowerCase()); // Prints => arvind pandey\\n\")), mdx(\"p\", null, \"There is huge list of other important methods inside String class. 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