{"id":227276,"date":"2025-06-06T04:08:03","date_gmt":"2025-06-06T04:08:03","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=227276"},"modified":"2025-06-06T04:08:06","modified_gmt":"2025-06-06T04:08:06","slug":"manipulating-2d-arrays-public-class-arraypractice-public-static-void-mainstring-args-int-array-3-5-7-500-250-125-784-267-23-25","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/06\/06\/manipulating-2d-arrays-public-class-arraypractice-public-static-void-mainstring-args-int-array-3-5-7-500-250-125-784-267-23-25\/","title":{"rendered":"Manipulating 2D Arrays public Class ArrayPractice { public static void main(String[] args) { int[][] array = {{3, 5, 7}, {500, 250, 125, 784, 267}, {23, 25};"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\"> Manipulating 2D Arrays public Class ArrayPractice { public static void main(String[] args) { int[][] array = {{3, 5, 7}, {500, 250, 125, 784, 267}, {23, 25}}; \/\/ Update the first array in the 2D array to the length of the 2D array: updateValue(array[0], array.length); \/\/ Update the second array in the 2D array to the sum of the first and last values in the array: updateValue(array[1], array[1][0] + array[1][array[1].length &#8211; 1]); \/\/ Update the third array in the 2D array to the sum of the first and last values in the array: updateValue(array[2], array[2][0] + array[2][array[2].length &#8211; 1]); printArray(array); } public static void updateValue(int[] array, int value) { for (int i = 0; i &lt; array.length; i++) { array[i] = value; } } public static void printArray(int[][] array) { for (int[] row : array) { for (int num : row) { System.out.print(num + &#8221; &#8220;); } System.out.println(); } } }<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-ast-global-color-1-color\">The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Correct Output:<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The Java program outputs the following after execution:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">CopyEdit<code>3 3 3 \n767 767 767 767 767 \n48 48 \n<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Explanation:<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">This Java program demonstrates how to <strong>manipulate elements in a 2D array<\/strong> by updating its inner arrays using a helper method and then printing the modified array.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u2705 Step-by-Step Breakdown:<\/h4>\n\n\n\n<pre class=\"wp-block-preformatted\">javaCopyEdit<code>int[][] array = {\n    {3, 5, 7},\n    {500, 250, 125, 784, 267},\n    {23, 25}\n};\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">This creates a 2D array (<code>array<\/code>) with three 1D arrays of different lengths (a <em>jagged array<\/em>).<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h4 class=\"wp-block-heading\">\ud83d\udd01 <code>updateValue(array[0], array.length);<\/code><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">This line updates all elements of the <strong>first inner array<\/strong> (<code>{3, 5, 7}<\/code>) to the value of <code>array.length<\/code>, which is <code>3<\/code> (since there are 3 inner arrays).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Result:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">javaCopyEdit<code>{3, 3, 3}\n<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h4 class=\"wp-block-heading\">\u2795 <code>updateValue(array[1], array[1][0] + array[1][array[1].length - 1]);<\/code><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">This updates all elements of the <strong>second inner array<\/strong> (<code>{500, 250, 125, 784, 267}<\/code>) to the sum of the <strong>first and last elements<\/strong>:<br><code>500 + 267 = 767<\/code><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Result:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">javaCopyEdit<code>{767, 767, 767, 767, 767}\n<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h4 class=\"wp-block-heading\">\u2795 <code>updateValue(array[2], array[2][0] + array[2][array[2].length - 1]);<\/code><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">This updates all elements of the <strong>third inner array<\/strong> (<code>{23, 25}<\/code>) to:<br><code>23 + 25 = 48<\/code><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Result:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">javaCopyEdit<code>{48, 48}\n<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h4 class=\"wp-block-heading\">\ud83d\udda8\ufe0f <code>printArray(array);<\/code><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Prints each row of the 2D array with updated values, each element separated by spaces and each row on a new line.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\ud83d\udd1a Conclusion:<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">This program reinforces understanding of:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>2D array indexing<\/li>\n\n\n\n<li>Updating array elements using helper methods<\/li>\n\n\n\n<li>Iterating over jagged arrays<\/li>\n\n\n\n<li>Accessing first and last elements with indexing<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Such exercises are foundational in learning how to <strong>navigate and manipulate multidimensional structures<\/strong> in Java.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"https:\/\/learnexams.com\/blog\/wp-content\/uploads\/2025\/06\/learnexams-banner9-68.jpeg\" alt=\"\" class=\"wp-image-227277\"\/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Manipulating 2D Arrays public Class ArrayPractice { public static void main(String[] args) { int[][] array = {{3, 5, 7}, {500, 250, 125, 784, 267}, {23, 25}}; \/\/ Update the first array in the 2D array to the length of the 2D array: updateValue(array[0], array.length); \/\/ Update the second array in the 2D array to the [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[25],"tags":[],"class_list":["post-227276","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/227276","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/comments?post=227276"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/227276\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=227276"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=227276"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=227276"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}