{"id":331,"date":"2025-06-30T07:26:20","date_gmt":"2025-06-30T07:26:20","guid":{"rendered":"https:\/\/thetestdata.com\/blog\/?p=331"},"modified":"2025-07-16T10:11:05","modified_gmt":"2025-07-16T10:11:05","slug":"difference-between-throw-and-throws","status":"publish","type":"post","link":"https:\/\/thetestdata.com\/blog\/difference-between-throw-and-throws\/","title":{"rendered":"Difference between throw and throws?"},"content":{"rendered":"\n<p>\u2604\ufe0f <code>throw<\/code> \u2013 <strong>Used to <em>actually throw<\/em> an exception<\/strong><\/p>\n\n\n\n<p>\u2705 <strong>What it does:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Used to <strong>manually trigger an exception<\/strong>.<\/li>\n\n\n\n<li>Can only throw one exception at a time.<\/li>\n\n\n\n<li>Typically used inside a method or block.<\/li>\n<\/ul>\n\n\n\n<p>\ud83d\udd27 <strong>Syntax:<\/strong><\/p>\n\n\n\n<p><strong>throw new ExceptionType(&#8220;Error message&#8221;);<\/strong><\/p>\n\n\n\n<p><strong>\ud83d\udd0d Example:<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>class Demo {\n    public static void validateAge(int age) {\n        if (age &lt; 18)\n            throw new IllegalArgumentException(\"Age must be 18 or above\");\n        System.out.println(\"Access granted\");\n    }\n\n    public static void main(String&#91;] args) {\n        validateAge(16);  \/\/ This will throw an exception\n    }\n}<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>\ud83d\udee1\ufe0f <code>throws<\/code> \u2013 Declares potential exception(s) a method might throw<\/p>\n\n\n\n<p><strong>\u2705 What it does:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Used in a method signature to <strong>declare<\/strong> that a method might throw one or more exceptions.<\/li>\n\n\n\n<li>Used for <strong>checked exceptions<\/strong>, which must be handled or declared.<\/li>\n<\/ul>\n\n\n\n<p><strong>\ud83d\udd27 Syntax:<\/strong><\/p>\n\n\n\n<p>returnType methodName() throws Exception1, Exception2 { }<\/p>\n\n\n\n<p><strong>\ud83d\udd0d Example:<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>import java.io.*;\n\nclass Demo {\n    public static void readFile(String path) throws IOException {\n        FileReader file = new FileReader(path);\n        \/\/ Reading logic...\n    }\n\n    public static void main(String&#91;] args) throws IOException {\n        readFile(\"nonexistent.txt\");  \/\/ Might throw IOException\n    }\n}<\/code><\/pre>\n\n\n\n<p>\ud83e\udde0<strong> Key Differences at a Glance<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Feature<\/th><th><code>throw<\/code><\/th><th><code>throws<\/code><\/th><\/tr><\/thead><tbody><tr><td><strong>Purpose<\/strong><\/td><td>Used to actually throw an exception<\/td><td>Declares possible exceptions<\/td><\/tr><tr><td><strong>Location<\/strong><\/td><td>Inside method or block<\/td><td>In method signature<\/td><\/tr><tr><td><strong>Keyword Followed By<\/strong><\/td><td>Instance of <code>Throwable<\/code> class<\/td><td>Exception class name(s)<\/td><\/tr><tr><td><strong>Throws How Many?<\/strong><\/td><td>One exception at a time<\/td><td>One or more exception types<\/td><\/tr><tr><td><strong>Checked or Unchecked?<\/strong><\/td><td>Works with both types<\/td><td>Mostly used for checked exceptions<\/td><\/tr><tr><td><strong>Causes Exception?<\/strong><\/td><td>Yes, actively throws<\/td><td>No, just declares<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Learn the difference between throw and throws in Java. Understand how each handles exceptions and affects method declaration and flow control<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"site-container-style":"default","site-container-layout":"default","site-sidebar-layout":"default","disable-article-header":"default","disable-site-header":"default","disable-site-footer":"default","disable-content-area-spacing":"default","footnotes":""},"categories":[17],"tags":[],"class_list":["post-331","post","type-post","status-publish","format-standard","hentry","category-java-interview-questions"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/thetestdata.com\/blog\/wp-json\/wp\/v2\/posts\/331","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/thetestdata.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/thetestdata.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/thetestdata.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/thetestdata.com\/blog\/wp-json\/wp\/v2\/comments?post=331"}],"version-history":[{"count":2,"href":"https:\/\/thetestdata.com\/blog\/wp-json\/wp\/v2\/posts\/331\/revisions"}],"predecessor-version":[{"id":424,"href":"https:\/\/thetestdata.com\/blog\/wp-json\/wp\/v2\/posts\/331\/revisions\/424"}],"wp:attachment":[{"href":"https:\/\/thetestdata.com\/blog\/wp-json\/wp\/v2\/media?parent=331"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/thetestdata.com\/blog\/wp-json\/wp\/v2\/categories?post=331"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/thetestdata.com\/blog\/wp-json\/wp\/v2\/tags?post=331"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}