{"id":10309,"date":"2022-09-19T16:30:36","date_gmt":"2022-09-19T11:00:36","guid":{"rendered":"https:\/\/btechgeeks.com\/?p=10309"},"modified":"2022-09-19T16:31:49","modified_gmt":"2022-09-19T11:01:49","slug":"java-program-to-swap-two-numbers","status":"publish","type":"post","link":"https:\/\/btechgeeks.com\/java-program-to-swap-two-numbers\/","title":{"rendered":"Java swap two integers &#8211; Java Program to Swap Two Numbers"},"content":{"rendered":"<p><strong>Java swap two integers: <\/strong>Interested in programming and want to excel in it by choosing the short ways. Then, practicing with the available <a href=\"https:\/\/btechgeeks.com\/java-programming-examples\/\">Java Program list<\/a> is mandatory.<\/p>\n<h2>Program to Swap Two Numbers<\/h2>\n<p>In this article we will see multiple ways to swap two numbers in Java.<\/p>\n<p>When we swap two numbers, it means that values of two numbers are swapped. Generally two variables can be swapped by taking a third variable. There are also many more possible approaches like,<\/p>\n<ul>\n<li><a href=\"#Swap_two_numbers_by_using_a_third_variable\">Swap two numbers by using a third variable<\/a><\/li>\n<li><a href=\"#Swap_two_numbers_by_taking_inputs_from_user\">Swap two numbers by taking inputs from user<\/a><\/li>\n<li><a href=\"#Swap_two_numbers_without_using_a_third_variable\">Swap two numbers without using a third variable<\/a><\/li>\n<li><a href=\"#Swap_two_numbers_using_Bitwise_XOR\">Swap two numbers using Bitwise XOR<\/a><\/li>\n<\/ul>\n<p>Now, let&#8217;s see the approaches one by one<\/p>\n<h3><a id=\"Swap_two_numbers_by_using_a_third_variable\"><\/a>Method-I :- Swap two values of numbers by using a third variable<\/h3>\n<p>With given two numbers we can swap the values by taking a third variable. Initially we assign the value of first variable in a third variable. Then we store the value of 2nd variable in the place of first variable. Then the third variable (which contains the value of 1st variable) is in assigned in 2nd variable.<\/p>\n<p>Now the values are swapped i.e. 1st variable contain value of 2nd variable and 2nd variable contains the value of first variable.<\/p>\n<p><strong>Approach<\/strong><\/p>\n<ul>\n<li>Declare and assign two variable say a and b.<\/li>\n<li>Let&#8217;s take a temporary (third) variable as temp.<\/li>\n<li>Print the numbers before swapping.<\/li>\n<li>Initially assign a&#8217;s value in temp.<\/li>\n<li>Then assign b&#8217;s value in a. Now, b will have value of a.<\/li>\n<li>Then assign temp&#8217;s value (initially contained a&#8217;s value) to b.<\/li>\n<li>Now values are swapped.<\/li>\n<li>Print the two numbers.<\/li>\n<\/ul>\n<p><strong>Program:<\/strong><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"java\">public class SwapTwoNumbers \r\n{\r\n\r\n    public static void main(String[] args) \r\n{\r\n\r\n        int a = 58, b = 72;\r\n        \/\/print the values of numbers before swapping\r\n        System.out.println(\"--Before swapping--\");\r\n        System.out.println(\"First number = \" + a);\r\n        System.out.println(\"Second number = \" + b);\r\n\r\n        \/\/ Assign value of a in temporary(third) variable\r\n        int temp = a;\r\n\r\n        \/\/ Value of b will be stored in a \r\n        a = b;\r\n\r\n        \/\/ Value of temp(temporary variable) initially contains a's value\r\n        \/\/ a's value assigned to b\r\n        b = temp;\r\n        \/\/ print the values of number after swapping\r\n        System.out.println(\"\\n\\n--After swapping--\");\r\n        System.out.println(\"First number = \" + a);\r\n        System.out.println(\"Second number = \" + b);\r\n    }\r\n}\r\n\r\n<\/pre>\n<pre>Output:\r\n\r\n--Before swapping--\r\nFirst number = 58\r\nSecond number = 72\r\n\r\n--After swapping--\r\nFirst number = 72\r\nSecond number = 58<\/pre>\n<h3><a id=\"Swap_two_numbers_by_taking_inputs_from_user\"><\/a>Method-II :- Swap two numbers by taking inputs from user<\/h3>\n<p>In Java, <code>java.util<\/code> package provide a class i.e. J<code>ava Scanner class<\/code> through which we can ask user to enter the inputs.<\/p>\n<p>Then we can store the input of two variables and swap the values between them. Let&#8217;s try to implement this using below approach.<\/p>\n<p>This method is similar to method-I but here we are asking user to give inputs.<\/p>\n<p><strong>Approach<\/strong><\/p>\n<ul>\n<li>Input two numbers from the user say a and b.<\/li>\n<li>Let&#8217;s take a temporary (third) variable as temp.<\/li>\n<li>Print the numbers before swapping.<\/li>\n<li>Initially assign a&#8217;s value in temp.<\/li>\n<li>Then assign b&#8217;s value in a. Now, b will have value of a.<\/li>\n<li>Then assign temp&#8217;s value (initially contained a&#8217;s value) to b.<\/li>\n<li>Now values are swapped.<\/li>\n<li>Print the two numbers<\/li>\n<\/ul>\n<p><strong>Program:<\/strong><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"java\">import java.util.Scanner;\r\nclass SwapTwoNumbers\r\n{\r\n   public static void main(String args[])\r\n   {\r\n    int a,b,temp;\r\n    \/\/ Asking user to give inputs\r\n    System.out.println(\"Enter any two numbers : \");\r\n    \/\/ create Scanner class objects to take the inputs\r\n    Scanner sc = new Scanner(System.in);\r\n      \r\n    a = sc.nextInt();\r\n    b = sc.nextInt();\r\n    \/\/ print the values before swapping \r\n    System.out.println(\"--Before swapping--\");\r\n    System.out.println(\"First number = \" + a);\r\n    System.out.println(\"Second number = \" + b);\r\n\r\n    \/\/ Assign value of a in temporary(third) variable\r\n    temp = a;\r\n    \/\/ Value of b will be stored in a \r\n    a = b;\r\n    \/\/ Value of temp (temporary variable) initially contains a's value\r\n    \/\/ a's value assigned to b\r\n    b = temp;\r\n    \r\n    \/\/ print the values after swapping\r\n    System.out.println(\"--After swapping--\");\r\n    System.out.println(\"First number = \" + a);\r\n    System.out.println(\"Second number = \" + b);\r\n   }\r\n}\r\n<\/pre>\n<pre>Output:\r\n\r\nEnter any two numbers :\r\n5\r\n8\r\n\r\n--Before swapping--\r\nFirst number = 5\r\nSecond number = 8\r\n\r\n--After swapping--\r\nFirst number = 8\r\nSecond number = 5<\/pre>\n<h3><a id=\"Swap_two_numbers_without_using_a_third_variable\"><\/a>Method-III:- Swap two numbers without using a third variable<\/h3>\n<p>We can swap two numbers using arithmetic operators only. Let&#8217;s implement this using following approach.<\/p>\n<p><strong>Approach:<\/strong><\/p>\n<ul>\n<li>Declare and initialize two variables say &#8216;a&#8217; and &#8216;b&#8217;.<\/li>\n<li>Print the original values.<\/li>\n<li>Initially store the sum of two numbers in a<\/li>\n<li>Now for variable b assign the difference between a and b. Now indirectly b is assigned with original values of a.<\/li>\n<li>Similarly to b assign the difference between a and b. Now indirectly a is assigned with original value of b.<\/li>\n<\/ul>\n<p><strong>Program:<\/strong><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"java\">class SwapTwoNumbers \r\n{\r\n    public static void main(String args[])\r\n    {\r\n        \/\/ declare the numbers to be swapped\r\n        int a = 29;\r\n        int b = 65;\r\n        \/\/print the values of numbers before swapping\r\n        System.out.println(\"--Before swapping--\");\r\n        System.out.println(\"First number = \" + a);\r\n        System.out.println(\"Second number = \" + b);\r\n    \r\n        \/\/ Addition of both the values are stored in a\r\n        a= a + b;\r\n        \/\/ b value is assigned with the difference between a and b\r\n        \/\/ i.e. now b contains a\r\n        b = a - b;\r\n        \/\/ difference of a and b i.e. total value-a is stored in a \r\n        a = a - b;\r\n        \r\n        \/\/ print the values of number after swapping\r\n        System.out.println(\"\\n\\n--After swapping--\");\r\n        System.out.println(\"First number = \" + a);\r\n        System.out.println(\"Second number = \" + b);\r\n    }\r\n}\r\n<\/pre>\n<pre>Output:\r\n\r\n--Before swapping--\r\nFirst number = 29\r\nSecond number = 65\r\n\r\n--After swapping--\r\nFirst number = 65\r\nSecond number = 29<\/pre>\n<h3><a id=\"Swap_two_numbers_using_Bitwise_XOR\"><\/a>Method IV:- Swap values of two numbers using Bitwise XOR<\/h3>\n<p>We can also use Bitwise<code> XOR operato<\/code>r to swap two variables. To implement this, we will use the below approach.<\/p>\n<p><strong>Approach<\/strong><\/p>\n<ul>\n<li>Declare and initialize two variables say &#8216;a&#8217; and &#8216;b&#8217;.<\/li>\n<li>Print the original values.<\/li>\n<li>If we compute <code>bitwise XOR<\/code> of two numbers then it will give all bits as 1 wherever bits of the two number differs, otherwise it will give bits as 0.<\/li>\n<li>Initially we will store a^b in a.<\/li>\n<li>Then we will store a^b in b, i.e. now b will contain the original value of a.<\/li>\n<li>Now we will again perform a^b and store this value in a, i.e. now a will contain original value of b.<\/li>\n<li>Now two numbers are swapped.<\/li>\n<li>Print the swapped numbers.<\/li>\n<\/ul>\n<p><strong>Program:<\/strong><\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"java\">class SwapTwoNumbers \r\n{\r\n    public static void main(String args[])\r\n    {\r\n        int a = 6;\r\n        int b = 13;\r\n        \r\n        \/\/print the values of numbers before swapping\r\n        System.out.println(\"--Before swapping--\");\r\n        System.out.println(\"First number = \" + a);\r\n        System.out.println(\"Second number = \" + b);\r\n\r\n \r\n        \/\/ For XOR operations. x=0110, y=1101\r\n        a = a ^ b; \/\/ a now becomes 11 (1011)\r\n        b = a ^ b; \/\/ b becomes 6 (0110)\r\n        a = a ^ b; \/\/ a becomes 13 (1101)\r\n \r\n        \/\/ print the values of number after swapping\r\n        System.out.println(\"\\n\\n--After swapping--\");\r\n        System.out.println(\"First number = \" + a);\r\n        System.out.println(\"Second number = \" + b);\r\n\r\n    }\r\n}\r\n<\/pre>\n<pre>Output:\r\n\r\n--Before swapping--\r\nFirst number = 6\r\nSecond number = 13\r\n\r\n--After swapping--\r\nFirst number = 13\r\nSecond number = 6<\/pre>\n<p>Are you seeking professional help for coding in the Java programming language? The tutorial of <a href=\"https:\/\/btechgeeks.com\/java-programming-examples\/\">Java Programming Examples<\/a> for beginners and experts will strongly improve your coding skills then you can program for any logic in Java.<\/p>\n<p><strong>Related Java Basic Programs:<\/strong><\/p>\n<ul>\n<li><a href=\"https:\/\/btechgeeks.com\/java-program-to-print-the-integer-entered-by-user\/\">Java Program to Print an Integer (Entered by the User)<\/a><\/li>\n<li><a href=\"https:\/\/btechgeeks.com\/java-program-to-add-two-integers\/\">Java Program to Add Two Integers<\/a><\/li>\n<li><a href=\"https:\/\/btechgeeks.com\/java-program-to-multiply-two-floating-point-numbers\/\">Java Program to Multiply two Floating Point Numbers<\/a><\/li>\n<li><a href=\"https:\/\/btechgeeks.com\/java-program-to-find-ascii-value-of-a-character\/\">Java Program to Find ASCII Value of a character<\/a><\/li>\n<li><a href=\"https:\/\/btechgeeks.com\/java-program-to-compute-quotient-and-remainder\/\">Java Program to Compute Quotient and Remainder<\/a><\/li>\n<li><a href=\"https:\/\/btechgeeks.com\/java-program-to-swap-two-numbers\/\">Java Program to Swap Two Numbers<\/a><\/li>\n<li><a href=\"https:\/\/btechgeeks.com\/java-program-to-check-whether-a-number-is-even-or-odd\/\">Java Program to Check Whether a Number is Even or Odd<\/a><\/li>\n<li><a href=\"https:\/\/btechgeeks.com\/java-program-to-find-the-largest-among-three-numbers\/\">Java Program to Find the Largest Among Three Numbers<\/a><\/li>\n<li><a href=\"https:\/\/btechgeeks.com\/java-program-to-find-the-frequency-of-character-in-a-string\/\">Java Program to Find the Frequency of Character in a String<\/a><\/li>\n<li><a href=\"https:\/\/btechgeeks.com\/java-program-to-remove-white-spaces-from-string\/\">Java Program to Remove All Whitespaces from a String<\/a><\/li>\n<li><a href=\"https:\/\/btechgeeks.com\/java-program-to-round-the-number-to-n-decimal-places\/\">Java Program to Round a Number to n Decimal Places<\/a><\/li>\n<li><a href=\"https:\/\/btechgeeks.com\/java-program-to-check-the-string-is-null-or-empty\/\">Java Program to Check if a String is Empty or Null<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Java swap two integers: Interested in programming and want to excel in it by choosing the short ways. 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When we swap two numbers, it means that &#8230; <a title=\"Java swap two integers &#8211; Java Program to Swap Two Numbers\" class=\"read-more\" href=\"https:\/\/btechgeeks.com\/java-program-to-swap-two-numbers\/\" aria-label=\"More on Java swap two integers &#8211; Java Program to Swap Two Numbers\">Read more<\/a><\/p>\n","protected":false},"author":9,"featured_media":10311,"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 swap two integers - Java Program to Swap Two Numbers - 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-swap-two-numbers\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Java swap two integers - Java Program to Swap Two Numbers - BTech Geeks\" \/>\n<meta property=\"og:description\" content=\"Java swap two integers: Interested in programming and want to excel in it by choosing the short ways. 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Java Program to Swap Two Numbers\"}]},{\"@type\":\"Article\",\"@id\":\"https:\/\/btechgeeks.com\/java-program-to-swap-two-numbers\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/btechgeeks.com\/java-program-to-swap-two-numbers\/#webpage\"},\"author\":{\"@id\":\"https:\/\/btechgeeks.com\/#\/schema\/person\/0f6d731bda7051ce3586f71299f391cd\"},\"headline\":\"Java swap two integers &#8211; Java Program to Swap Two Numbers\",\"datePublished\":\"2022-09-19T11:00:36+00:00\",\"dateModified\":\"2022-09-19T11:01:49+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/btechgeeks.com\/java-program-to-swap-two-numbers\/#webpage\"},\"wordCount\":778,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/btechgeeks.com\/#organization\"},\"image\":{\"@id\":\"https:\/\/btechgeeks.com\/java-program-to-swap-two-numbers\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/btechgeeks.com\/wp-content\/uploads\/2021\/06\/Java-Program-to-Swap-Two-Numbers.png\",\"articleSection\":[\"JAVA\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/btechgeeks.com\/java-program-to-swap-two-numbers\/#respond\"]}]},{\"@type\":\"Person\",\"@id\":\"https:\/\/btechgeeks.com\/#\/schema\/person\/0f6d731bda7051ce3586f71299f391cd\",\"name\":\"Satyabrata Jena\",\"image\":{\"@type\":\"ImageObject\",\"@id\":\"https:\/\/btechgeeks.com\/#personlogo\",\"inLanguage\":\"en-US\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/c1bf8033ec357d085f41815bee1625cc?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/c1bf8033ec357d085f41815bee1625cc?s=96&d=mm&r=g\",\"caption\":\"Satyabrata Jena\"},\"description\":\"Software Developer | Technical Content Writer\/Editor | Tech Blogger\",\"url\":\"https:\/\/btechgeeks.com\/author\/satyabrata\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Java swap two integers - Java Program to Swap Two Numbers - BTech Geeks","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/btechgeeks.com\/java-program-to-swap-two-numbers\/","og_locale":"en_US","og_type":"article","og_title":"Java swap two integers - Java Program to Swap Two Numbers - BTech Geeks","og_description":"Java swap two integers: Interested in programming and want to excel in it by choosing the short ways. 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