{"id":39735,"date":"2024-05-02T09:42:41","date_gmt":"2024-05-02T09:42:41","guid":{"rendered":"https:\/\/accuweb.cloud\/resource\/?post_type=faq&#038;p=39735"},"modified":"2026-02-19T07:00:46","modified_gmt":"2026-02-19T07:00:46","slug":"java-strings-methods","status":"publish","type":"faq","link":"https:\/\/accuweb.cloud\/resource\/articles\/java-strings-methods","title":{"rendered":"Introduction: Java String"},"content":{"rendered":"<h2 class=\"ack-h2\">Introduction: Java String<\/h2>\n<p>In Java, a String is a class that represents a sequence of characters. It is part of the java.lang package and it is one of the most commonly used classes in <a class=\"ack-link-color\" href=\"https:\/\/accuweb.cloud\/application\/java-hosting\" target=\"_blank\" rel=\"noopener\">Java.<\/a> The String class is immutable, meaning that once a String object is created, its content cannot be changed.<\/p>\n<p>Java is unique in supporting operator overloading exclusively for the String class. We can concatenate two strings using the <strong>+<\/strong> operator, as demonstrated by the expression <strong>&#8220;a&#8221; + &#8220;b&#8221;<\/strong> resulting in <strong>&#8220;ab.&#8221;<\/strong><\/p>\n<p>For effective string manipulation, Java provides two valuable classes: <strong>StringBuffer<\/strong> and <strong>StringBuilder<\/strong>. These classes allow for dynamic modification of string content, making them mutable compared to the immutable nature of regular String objects.<\/p>\n<div class=\"article-space\"><\/div>\n\t\t<div data-elementor-type=\"section\" data-elementor-id=\"38668\" class=\"elementor elementor-38668\" data-elementor-settings=\"{&quot;ha_cmc_init_switcher&quot;:&quot;no&quot;}\" data-elementor-post-type=\"elementor_library\">\n\t\t\t        <section class=\"elementor-section elementor-top-section elementor-element elementor-element-882321f elementor-section-boxed elementor-section-height-default elementor-section-height-default ct-header-fixed-none ct-row-max-none\" data-id=\"882321f\" data-element_type=\"section\" data-settings=\"{&quot;_ha_eqh_enable&quot;:false}\">\n            \n                        <div class=\"elementor-container elementor-column-gap-default \">\n                    <div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-7cc79cc\" data-id=\"7cc79cc\" data-element_type=\"column\">\n        <div class=\"elementor-widget-wrap elementor-element-populated\">\n                    \n        \t\t<div class=\"elementor-element elementor-element-e31b40f elementor-widget elementor-widget-shortcode\" data-id=\"e31b40f\" data-element_type=\"widget\" data-widget_type=\"shortcode.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-shortcode\"><\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t            <\/div>\n        <\/div>\n                    <\/div>\n        <\/section>\n        \t\t<\/div>\n\t\t\n<div class=\"article-space\"><\/div>\n<h2 class=\"ack-h2\">Different Ways to Create String<\/h2>\n<p>Several approaches exist for creating a string object in <a class=\"ack-link-color\" href=\"https:\/\/accuweb.cloud\/application\/java-hosting\" target=\"_blank\" rel=\"noopener\">Java<\/a>, and some commonly used methods are outlined below.<\/p>\n<p>1. <strong>Using string literal:<\/strong>This method involves directly assigning a string value to a variable using double quotes.<\/p>\n<div class=\"article-space\"><\/div>\n<pre><code class=\"language-javascript\">\r\nString str1 = \"Hello, World!\";<\/code><\/pre>\n<div class=\"article-space\"><\/div>\n<p>2. <strong>Using new keyword:<\/strong> This method employs the new keyword to explicitly instantiate a new string object.<\/p>\n<div class=\"article-space\"><\/div>\n<pre><code class=\"language-javascript\">\r\nString str2 = new String(\"Hello, World!\");<\/code><\/pre>\n<div class=\"article-space\"><\/div>\n<h2 class=\"ack-h2\">Java String Methods<\/h2>\n<p>Java provides a rich set of methods in the String class to manipulate and work with strings. Here are some commonly used methods:<\/p>\n<div class=\"article-space\"><\/div>\n\t\t<div data-elementor-type=\"section\" data-elementor-id=\"38668\" class=\"elementor elementor-38668\" data-elementor-settings=\"{&quot;ha_cmc_init_switcher&quot;:&quot;no&quot;}\" data-elementor-post-type=\"elementor_library\">\n\t\t\t        <section class=\"elementor-section elementor-top-section elementor-element elementor-element-882321f elementor-section-boxed elementor-section-height-default elementor-section-height-default ct-header-fixed-none ct-row-max-none\" data-id=\"882321f\" data-element_type=\"section\" data-settings=\"{&quot;_ha_eqh_enable&quot;:false}\">\n            \n                        <div class=\"elementor-container elementor-column-gap-default \">\n                    <div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-7cc79cc\" data-id=\"7cc79cc\" data-element_type=\"column\">\n        <div class=\"elementor-widget-wrap elementor-element-populated\">\n                    \n        \t\t<div class=\"elementor-element elementor-element-e31b40f elementor-widget elementor-widget-shortcode\" data-id=\"e31b40f\" data-element_type=\"widget\" data-widget_type=\"shortcode.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-shortcode\"><\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t            <\/div>\n        <\/div>\n                    <\/div>\n        <\/section>\n        \t\t<\/div>\n\t\t\n<div class=\"article-space\"><\/div>\n<h3 class=\"ack-h3\">Method 1: length(): Returns the length (number of characters) of the string.<\/h3>\n<h4 class=\"ack-h4\">Example:<\/h4>\n<div class=\"article-space\"><\/div>\n<pre><code class=\"language-javascript\">\r\nclass Test {\r\n\u00a0 \u00a0 public static void main(String[] args) {\r\n\u00a0 \u00a0 \u00a0 \u00a0 String str = \"Hello, World!\";\r\n\u00a0 \u00a0 \u00a0 \u00a0 int length = str.length(); \/\/ Returns 13\r\n\u00a0 \u00a0 \u00a0 \u00a0 System.out.println(length);\r\n\u00a0 \u00a0 }\r\n}\r\n<\/code><\/pre>\n<div class=\"article-space\"><\/div>\n<h4 class=\"ack-h4\">OUTPUT:<\/h4>\n<p>13M<\/p>\n<div class=\"article-space\"><\/div>\n<h3 class=\"ack-h3\">Method 2: charAt(): Returns the character at the specified index.<\/h3>\n<h4 class=\"ack-h4\">Example:<\/h4>\n<div class=\"article-space\"><\/div>\n<pre><code class=\"language-javascript\">\r\nclass Test {\r\n\u00a0 \u00a0 public static void main(String[] args) {\r\n\u00a0 \u00a0 \u00a0 \u00a0 String str = \"Hello, World!\";\r\n\u00a0 \u00a0 \u00a0 \u00a0 char firstChar = str.charAt(0); \/\/ Returns 'H'\r\n\u00a0 \u00a0 \u00a0 \u00a0 System.out.println(firstChar);\r\n\u00a0 \u00a0 }\r\n}\r\n<\/code><\/pre>\n<div class=\"article-space\"><\/div>\n<h4 class=\"ack-h4\">OUTPUT:<\/h4>\n<p>H<\/p>\n<div class=\"article-space\"><\/div>\n<h3 class=\"ack-h3\">Method 3:\u00a0 substring(): Returns a substring within the specified range.<\/h3>\n<h4 class=\"ack-h4\">Example:<\/h4>\n<div class=\"article-space\"><\/div>\n<pre><code class=\"language-javascript\">\r\nclass Test {\r\n\u00a0 \u00a0 public static void main(String[] args) {\r\n\u00a0 \u00a0 \u00a0 \u00a0 String str = \"Hello, World!\";\r\n\u00a0 \u00a0 \u00a0 \u00a0 String sub1 = str.substring(7);\u00a0 \u00a0 \u00a0 \u00a0\/\/ Returns \"World!\"\r\n\u00a0 \u00a0 \u00a0 \u00a0 String sub2 = str.substring(0, 5);\u00a0 \u00a0 \/\/ Returns \"Hello\"\r\n\u00a0 \u00a0 \u00a0 \u00a0 System.out.println(sub1);\r\n\u00a0 \u00a0 \u00a0 \u00a0 System.out.println(sub2);\r\n\u00a0 \u00a0 }\r\n}\r\n<\/code><\/pre>\n<div class=\"article-space\"><\/div>\n<h4 class=\"ack-h4\">OUTPUT:<\/h4>\n<p>World!<br \/>\nHello<\/p>\n<div class=\"article-space\"><\/div>\n<h3 class=\"ack-h3\">Method 4: concat(): Concatenates the specified string to the end of the current string.<\/h3>\n<h4 class=\"ack-h4\">Example:<\/h4>\n<div class=\"article-space\"><\/div>\n<pre><code class=\"language-javascript\">\r\nclass Test {\r\n\u00a0 \u00a0 public static void main(String[] args) {\r\n\u00a0 \u00a0 \u00a0 \u00a0 String str = \"Hello, World!\";\r\n\u00a0 \u00a0 \u00a0 \u00a0 String result1 = str.concat(\", Java!\"); \/\/ Returns \"Hello, World! Java!\"\r\n\u00a0 \u00a0 \u00a0 \u00a0 String result2 = str + \" Java!\";\u00a0 \u00a0 \u00a0 \u00a0 \/\/ Returns \"Hello, World! Java!\"\r\n\u00a0 \u00a0 \u00a0 \u00a0 System.out.println(result1);\r\n\u00a0 \u00a0 \u00a0 \u00a0 System.out.println(result2);\r\n\u00a0 \u00a0 }\r\n}\r\n<\/code><\/pre>\n<div class=\"article-space\"><\/div>\n<h4 class=\"ack-h4\">OUTPUT<\/h4>\n<p>Hello, World!, Java!<br \/>\nHello, World! Java!<\/p>\n<div class=\"article-space\"><\/div>\n<h3 class=\"ack-h3\">Method 5: equals(): Compares the content of two strings for equality.<\/h3>\n<h4 class=\"ack-h4\">Example:<\/h4>\n<div class=\"article-space\"><\/div>\n<pre><code class=\"language-javascript\">\r\nclass Test {\r\n\u00a0 \u00a0 \u00a0 \u00a0 String str = \"Hello, World!\";\r\n\u00a0 \u00a0 \u00a0 \u00a0 boolean isEqual = str.equals(\"Hello, World!\"); \/\/ Returns true\r\n\u00a0 \u00a0 \u00a0 \u00a0 boolean isEqualIgnoreCase = str.equalsIgnoreCase(\"hello, world!\"); \/\/ Returns true\r\n\u00a0 \u00a0 \u00a0 \u00a0 System.out.println(isEqual);\r\n\u00a0 \u00a0 \u00a0 \u00a0 System.out.println(isEqualIgnoreCase);\r\n\u00a0 \u00a0 }\r\n}\r\n<\/code><\/pre>\n<div class=\"article-space\"><\/div>\n<h4 class=\"ack-h4\">OUTPUT:<\/h4>\n<p>true<br \/>\ntrue<\/p>\n<div class=\"article-space\"><\/div>\n<h3 class=\"ack-h3\">Method 6:\u00a0 indexOf(): Returns the index of the first occurrence of the specified substring.<\/h3>\n<h4 class=\"ack-h4\">Example:<\/h4>\n<div class=\"article-space\"><\/div>\n<pre><code class=\"language-javascript\">\r\nclass Test {\r\n\u00a0 \u00a0 public static void main(String[] args) {\r\n\u00a0 \u00a0 \u00a0 \u00a0 String str = \"Hello, World!\";\r\n\u00a0 \u00a0 \u00a0 \u00a0 int indexOfComma = str.indexOf(\",\"); \/\/ indexOfComma is 5\r\n\u00a0 \u00a0 \u00a0 \u00a0 System.out.println(indexOfComma);\r\n\u00a0 \u00a0 }\r\n}\r\n<\/code><\/pre>\n<div class=\"article-space\"><\/div>\n<h4 class=\"ack-h4\">OUTPUT:<\/h4>\n<p>5<\/p>\n<div class=\"article-space\"><\/div>\n<h3 class=\"ack-h3\">Method 7: startsWith(): Checks if the string starts with the specified prefix.<\/h3>\n<h4 class=\"ack-h4\">Example:<\/h4>\n<div class=\"article-space\"><\/div>\n<pre><code class=\"language-javascript\">\r\n\r\nclass Test {\r\n\u00a0 \u00a0 public static void main(String[] args) {\r\n\u00a0 \u00a0 \u00a0 \u00a0 String str = \"Hello, World!\";\r\n\u00a0 \u00a0 \u00a0 \u00a0 boolean startsWithHello = str.startsWith(\"Hello\"); \/\/ startsWithHello is true\r\n\u00a0 \u00a0 \u00a0 \u00a0 System.out.println(startsWithHello);\r\n\u00a0 \u00a0 }\r\n}\r\n<\/code><\/pre>\n<div class=\"article-space\"><\/div>\n<h4 class=\"ack-h4\">OUTPUT:<\/h4>\n<p>True<\/p>\n<div class=\"article-extra-space\"><\/div>\n\t\t<div data-elementor-type=\"section\" data-elementor-id=\"38668\" class=\"elementor elementor-38668\" data-elementor-settings=\"{&quot;ha_cmc_init_switcher&quot;:&quot;no&quot;}\" data-elementor-post-type=\"elementor_library\">\n\t\t\t        <section class=\"elementor-section elementor-top-section elementor-element elementor-element-882321f elementor-section-boxed elementor-section-height-default elementor-section-height-default ct-header-fixed-none ct-row-max-none\" data-id=\"882321f\" data-element_type=\"section\" data-settings=\"{&quot;_ha_eqh_enable&quot;:false}\">\n            \n                        <div class=\"elementor-container elementor-column-gap-default \">\n                    <div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-7cc79cc\" data-id=\"7cc79cc\" data-element_type=\"column\">\n        <div class=\"elementor-widget-wrap elementor-element-populated\">\n                    \n        \t\t<div class=\"elementor-element elementor-element-e31b40f elementor-widget elementor-widget-shortcode\" data-id=\"e31b40f\" data-element_type=\"widget\" data-widget_type=\"shortcode.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-shortcode\"><\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t            <\/div>\n        <\/div>\n                    <\/div>\n        <\/section>\n        \t\t<\/div>\n\t\t\n<div class=\"article-space\"><\/div>\n<h3 class=\"ack-h3\">Method 8: endsWith(): Checks if the string ends with the specified suffix.<\/h3>\n<h4 class=\"ack-h4\">Example:<\/h4>\n<div class=\"article-space\"><\/div>\n<pre><code class=\"language-javascript\">\r\nclass Test {\r\n\u00a0 \u00a0 public static void main(String[] args) {\r\n\u00a0 \u00a0 \u00a0 \u00a0 String str = \"Hello, World!\";\r\n\u00a0 \u00a0 \u00a0 \u00a0 boolean endsWithWorld = str.endsWith(\"World!\"); \/\/ endsWithWorld is true\r\n\u00a0 \u00a0 \u00a0 \u00a0 System.out.println(endsWithWorld);\r\n\u00a0 \u00a0 }\r\n}\r\n<\/code><\/pre>\n<div class=\"article-space\"><\/div>\n<h4 class=\"ack-h4\">OUTPUT:<\/h4>\n<p>True<\/p>\n<div class=\"article-space\"><\/div>\n<h2 class=\"ack-h2\">Conclusion<\/h2>\n<p>Overall, the String class is fundamental in <a class=\"ack-link-color\" href=\"https:\/\/accuweb.cloud\/application\/java-hosting\" target=\"_blank\" rel=\"noopener\">Java<\/a> for text manipulation, and its immutability ensures data integrity.<\/p>\n<div class=\"cta-btn-top-space\"><\/div>\n\t\t<div data-elementor-type=\"section\" data-elementor-id=\"38668\" class=\"elementor elementor-38668\" data-elementor-settings=\"{&quot;ha_cmc_init_switcher&quot;:&quot;no&quot;}\" data-elementor-post-type=\"elementor_library\">\n\t\t\t        <section class=\"elementor-section elementor-top-section elementor-element elementor-element-882321f elementor-section-boxed elementor-section-height-default elementor-section-height-default ct-header-fixed-none ct-row-max-none\" data-id=\"882321f\" data-element_type=\"section\" data-settings=\"{&quot;_ha_eqh_enable&quot;:false}\">\n            \n                        <div class=\"elementor-container elementor-column-gap-default \">\n                    <div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-7cc79cc\" data-id=\"7cc79cc\" data-element_type=\"column\">\n        <div class=\"elementor-widget-wrap elementor-element-populated\">\n                    \n        \t\t<div class=\"elementor-element elementor-element-e31b40f elementor-widget elementor-widget-shortcode\" data-id=\"e31b40f\" data-element_type=\"widget\" data-widget_type=\"shortcode.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-shortcode\"><\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t            <\/div>\n        <\/div>\n                    <\/div>\n        <\/section>\n        \t\t<\/div>\n\t\t\n<div class=\"cta-btn-bottom-space\"><\/div>\n","protected":false},"author":1,"featured_media":52879,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","class_list":["post-39735","faq","type-faq","status-publish","has-post-thumbnail","hentry","faq_topics-java-string","faq_topics-java-tutorials","faq_topics-kb","faq_topics-product-documentation","faq_topics-tutorial-series","faq_topics-tutorials"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v20.10 (Yoast SEO v24.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Java String Manipulation: A Comprehensive Guide<\/title>\n<meta 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