{"id":22893,"date":"2023-04-27T05:46:40","date_gmt":"2023-04-27T00:16:40","guid":{"rendered":"https:\/\/btechgeeks.com\/?p=22893"},"modified":"2023-04-28T09:57:07","modified_gmt":"2023-04-28T04:27:07","slug":"java-program-to-count-total-number-of-positive-elements-in-a-matrix","status":"publish","type":"post","link":"https:\/\/btechgeeks.com\/java-program-to-count-total-number-of-positive-elements-in-a-matrix\/","title":{"rendered":"Java Program to Count Total Number of Positive Elements in a Matrix"},"content":{"rendered":"<p>In the previous article, we have discussed <a href=\"https:\/\/btechgeeks.com\/java-program-to-count-the-numbers-of-0s-in-a-binary-matrix\/\">Java Program to Count the Numbers of 0\u2019s in a Binary Matrix<\/a><\/p>\n<p>In this article we are going to see how we can write a program to count the Total Number of Positive Elements in a matrix in JAVA language.<\/p>\n<h2>Java Program to Count Total Number of Positive Elements in a Matrix<\/h2>\n<p>A 3*3 Matrix is having 3 rows and 3 columns where this 3*3 represents the dimension of the matrix. Means there are 3*3 i.e. total 9 elements in a 3*3 Matrix.<\/p>\n<p>Let\u2019s understand it in more simpler way.<\/p>\n<pre>                   | A00   A01   A02 |\r\nMatrix A =  | A10   A11   A12 |\r\n                   | A20   A21   A22 | 3*3<\/pre>\n<ul>\n<li><code>Matrix A<\/code>\u00a0represents a 3*3 matrix.<\/li>\n<li>\u2018<code>A<\/code>\u2018 represents the matrix element<\/li>\n<li>\u2018<code>Aij<\/code>\u2018 represents the matrix element at it\u2019s matrix position\/index.<\/li>\n<li>\u2018<code>i<\/code>\u2018 represents the row index<\/li>\n<li>\u2018<code>j<\/code>\u2018 represents the column index<\/li>\n<li>Means\u00a0<code>A00=Aij<\/code>\u00a0 where\u00a0<code>i=0<\/code>\u00a0and\u00a0<code>j=0<\/code>,\u00a0\u00a0<code>A01=aij<\/code>\u00a0where\u00a0<code>i=0<\/code>\u00a0and\u00a0<code>j=1<\/code>\u00a0and like this.<\/li>\n<li>Here we have started\u00a0<code>row<\/code>\u00a0value from 0 and\u00a0<code>column<\/code>\u00a0value from 0.<\/li>\n<\/ul>\n<p><strong>Positive elements<\/strong> in a matrix are the elements which are greater than 0.<\/p>\n<p>Let\u2019s see different ways to count total number of positive elements in a Matrix.<\/p>\n<ul>\n<li><a href=\"#By_Static_Initialization_of_Array_Elements\">By Static Initialization of Array Elements<\/a><\/li>\n<li><a href=\"#By_Dynamic_Initialization_of_Array_Elements\">By Dynamic Initialization of Array Elements<\/a><\/li>\n<\/ul>\n<h3><a id=\"By_Static_Initialization_of_Array_Elements\"><\/a>Method-1: Java Program to Count Total Number of Negative Elements in a Matrix By Static Initialization of Array Elements<\/h3>\n<p><strong>Approach:<\/strong><\/p>\n<ul>\n<li>Declare and initialize an array of size 3&#215;3, with elements.<\/li>\n<li>Use two for loops to iterate the rows and columns.<\/li>\n<li>Inside the for loops count all the positive elements using a counter.<\/li>\n<li>Print the result.<\/li>\n<\/ul>\n<p><strong>Program:<\/strong><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"java\">public class matrix\r\n{\r\n    public static void main(String args[])\r\n    {\r\n        \/\/ Initializing the 3X3 matrix i.e. 2D array\r\n        int arr[][] = {{19,25,-32},{40,-54,-62},{-70,-20,60}};\r\n        int row, col ,count = 0;\r\n\r\n        System.out.print(\"The matrix elements are : \");\r\n        printMatrix(arr);\r\n\r\n        \/\/ Loops to count total number of positive elements in a matrix\r\n        for(row=0;row&lt;3;row++)\r\n            for(col=0;col&lt;3;col++)\r\n            {\r\n                if(arr[row][col]&gt;0)\r\n                    count++;\r\n            }   \r\n        \r\n        System.out.println(\"\\nNumber of positive elements in the matrix are : \"+count);\r\n    }\r\n\r\n    \/\/ Method to print the matrix\r\n    static void printMatrix(int arr[][])\r\n    {\r\n        int row, col;\r\n        \/\/ Loop to print the elements\r\n        for(row=0;row&lt;3;row++)\r\n        {\r\n            \/\/ Used for formatting\r\n            System.out.print(\"\\n\");\r\n            for(col=0;col&lt;3;col++)\r\n            {\r\n                System.out.print(arr[row][col]+\" \");\r\n            }\r\n        }\r\n        System.out.print(\"\\n\");\r\n    }\r\n}<\/pre>\n<pre>Output:\r\n\r\nThe matrix elements are : \r\n19 25 -32 \r\n40 -54 -62 \r\n-70 -20 60\r\n\r\nNumber of positive elements in the matrix are : 4<\/pre>\n<h3><a id=\"By_Dynamic_Initialization_of_Array_Elements\"><\/a>Method-2: Java Program to Count Total Number of Negative Elements in a Matrix By Dynamic Initialization of Array Elements<\/h3>\n<p><strong>Approach:<\/strong><\/p>\n<ul>\n<li>Declare one array of size 3&#215;3.<\/li>\n<li>Ask the user for input of array elements and store them in the array using two for loops.<\/li>\n<li>Use two for loops to iterate the rows and columns .<\/li>\n<li>Inside the for loops count all the negative elements using a counter.<\/li>\n<li>Print the result.<\/li>\n<\/ul>\n<p><strong>Program:<\/strong><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"java\">import java.util.Scanner;\r\npublic class matrix{\r\n    public static void main(String args[])\r\n    {\r\n        \/\/Scanner class to take input\r\n        Scanner scan = new Scanner(System.in);\r\n\r\n        \/\/ Initializing the 3X3 matrix i.e. 2D array\r\n        int arr[][] = new int[3][3];\r\n        int row, col ,count = 0;\r\n\r\n        \/\/ Taking matrix1 input\r\n        System.out.println(\"Enter matrix elements : \");\r\n        for(row=0;row&lt;3;row++)\r\n            for(col=0;col&lt;3;col++)\r\n                arr[row][col] = scan.nextInt();\r\n\r\n\r\n        System.out.print(\"The matrix elements are : \");\r\n        printMatrix(arr);\r\n\r\n        \/\/ Loops to count total number of positive elements in a matrix\r\n        for(row=0;row&lt;3;row++)\r\n            for(col=0;col&lt;3;col++)\r\n            {\r\n                if(arr[row][col]&gt;0)\r\n                    count++;\r\n            }   \r\n        \r\n        System.out.println(\"\\nNumber of positive elements in the matrix are : \"+count);\r\n    }\r\n\r\n    \/\/ Method to print the matrix\r\n    static void printMatrix(int arr[][])\r\n    {\r\n        int row, col;\r\n        \/\/ Loop to print the elements\r\n        for(row=0;row&lt;3;row++)\r\n        {\r\n            \/\/ Used for formatting\r\n            System.out.print(\"\\n\");\r\n            for(col=0;col&lt;3;col++)\r\n            {\r\n                System.out.print(arr[row][col]+\" \");\r\n            }\r\n        }\r\n        System.out.print(\"\\n\");\r\n    }\r\n}<\/pre>\n<pre>Output:\r\n\r\nEnter matrix elements : \r\nThe matrix elements are : \r\n0 6 -1 \r\n-2 3 8 \r\n7 0 5\r\n\r\nNumber of positive elements in the matrix are : 5<\/pre>\n<p>Explore complete java concepts from the <a href=\"https:\/\/btechgeeks.com\/java-programming-examples\/\">Java programming examples<\/a> and get ready to become a good programmer and crack the java software developer interview with ease.<\/p>\n<p><strong>Related Java Programs:<\/strong><\/p>\n<ul>\n<li><a href=\"https:\/\/btechgeeks.com\/java-program-to-count-total-number-of-negative-elements-in-a-matrix\/\">Java Program to Count Total Number of Negative Elements in a Matrix<\/a><\/li>\n<li><a href=\"https:\/\/btechgeeks.com\/java-program-to-clockwise-rotate-the-matrix-elements\/\">Java Program to Clockwise Rotate the Matrix Elements<\/a><\/li>\n<li><a href=\"https:\/\/btechgeeks.com\/java-program-to-rotate-the-matrix-90-degree\/\">Java Program to Rotate the Matrix 90 degree<\/a><\/li>\n<li><a href=\"https:\/\/btechgeeks.com\/java-program-to-rotate-the-matrix-180-degree\/\">Java Program to Rotate the Matrix 180 degree<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>In the previous article, we have discussed Java Program to Count the Numbers of 0\u2019s in a Binary Matrix In this article we are going to see how we can write a program to count the Total Number of Positive Elements in a matrix in JAVA language. Java Program to Count Total Number of Positive &#8230; <a title=\"Java Program to Count Total Number of Positive Elements in a Matrix\" class=\"read-more\" href=\"https:\/\/btechgeeks.com\/java-program-to-count-total-number-of-positive-elements-in-a-matrix\/\" aria-label=\"More on Java Program to Count Total Number of Positive Elements in a Matrix\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":22889,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"spay_email":""},"categories":[15],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v17.2 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Java Program to Count Total Number of Positive Elements in a Matrix - BTech Geeks<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/btechgeeks.com\/java-program-to-count-total-number-of-positive-elements-in-a-matrix\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Java Program to Count Total Number of Positive Elements in a Matrix - BTech Geeks\" \/>\n<meta property=\"og:description\" content=\"In the previous article, we have discussed Java Program to Count the Numbers of 0\u2019s in a Binary Matrix In this article we are going to see how we can write a program to count the Total Number of Positive Elements in a matrix in JAVA language. 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