Why is the federal judiciary of the United States divided into circuits? Execute it as a Junit test and capture the output here. The append() method is used to append the string representation of the double argument to this sequence. How to Convert Double to String to Double in Java? To convert double primitive type to a Double object, you need to use Double constructor. Java code examples and interview questions. The + operator is an addition operator but when used with Strings it acts as a concatenation operator. Do bracers of armor stack with magic armor enhancements and special abilities? Two standard approaches are as follows: Using valueOf () method of String class. Agree Method returns a String object representing the passed double value. It is a static utility method of We can use Java String format method to convert double to String in our programs. toString() method of Object Class in java is always called by directly or indirectly. So does the OP's code. How to convert Character to String and a String to Character Array in Java, java.io.FileNotFoundException How to solve File Not Found Exception, java.lang.arrayindexoutofboundsexception How to handle Array Index Out Of Bounds Exception, java.lang.NoClassDefFoundError How to solve No Class Def Found Error. Please read and accept our website Terms and Privacy Policy to post a comment. Here as a format you can use 'f' which means floating point and the result is formatted as a decimal number. In this tutorial, we covered eight different approaches to convert double to String in Java. String str3 = "999.333"; double var3 = new Double(str3); Double class has a constructor which parses the String argument that we pass in the constructor, and returns an equivalent double value. Example :In this example, we are using format method of DecimalFormat class for conversion. Lately there's been a trend of suggesting the usage of a DecimalFormat instead since it will respect different locales and the usage of commas or points as a decimal separator. Japanese girlfriend visiting me in Canada - questions at border control? String class has valueOf() method which is overloaded and those variants take int, float, double, long data types as parameters. includes a class method toString(), that will convert its Ill post more code, basically when the user touches the edittext box i want the information to calculate a fill the edittext box. Let me show you one by one : Using String.format() : We can format a double number using the String.format() method. Here is a simple example: The %.0f parameter tells the method that we want 0 decimal places, which means we only want the whole number. I moved that litle bit of code out of the ontouchlistener and it worked fine. Here, we are using a concatenation operator + to store the double value as a string. 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WebThanks for watching this videoPlease Like share & Subscribe to my channel Examples: Input: double = 3452.234 Output: 3452 Input: double = 98.23 Output: // double primitive double val = 23.78; To convert it to a Double object, use Double constructor. Double can be converted to string by using toString() , lets see how it actually works. In this example, I showed how to convert a Double to String by utilizing Javas five classes: Double, String, DecimalFormat, StringBuffer, and StringBuilder. Different Ways for Converting Double to String. For any other feedbacks or questions you can either use the comments section or contact me form. Tutorials and posts about Java, Spring, Hadoop and many more. Still you can pass double primitive data type because of autoboxing. 5 Ways to Connect Wireless Headphones to TV. Using valueOf () method. Thus, using Double.toString(double d) method of the wrapper class Double, you can convert double to String in Java. There are a few different ways to do this, but the most common way is to use the toString () method. Web3 Answers. Thanks! Ill post more code, basically when the user touches the edittext box i want the information to calculate a fill the edittext box. Here note that with double value you can use d or D (even f or F, for single float). Dont stop learning now. WebComplete the Java method convertBinaryStrToDecimal (String s) to convert an input of binary string s to the equivalent decimal number using "for loop". We have this method in the class Double. They are:Using the static method parseInt (String) of the java.lang.Integer wrapper classUsing the static method valueOf (String) of the java.lang.Integer wrapper classUsing the constructor of Integer wrapper class that takes String as its parameter valueOf() method and by using new Double() constructor and then Making statements based on opinion; back them up with references or personal experience. Not the answer you're looking for? In this approach, we are using format method of a String class to convert double to string. Not sure in Java these days, but in JavaScript, I often do. How can I fix it? There isn't a problem here to be solved. Here, we are also rounding up a double number to two digits and then converting to string. There are several ways to convert double type data to a string. This code compiles and works for me. However, the object is automatically converted into the primitive type. WebThis is the easiest way to convert double to string in java. Double.toString() method Join them now to gain exclusive access to the latest news in the Java world, as well as insights about Android, Scala, Groovy and other related technologies. WebIn the above example, the valueOf() method of Double class converts the string values into the double.. Thanks for contributing an answer to Stack Overflow! In this article, we will learn how to Convert Double to String in Java. We do not currently allow content pasted from ChatGPT on Stack Overflow; read our policy here. One solution to avoid exponential notation when converting Double to String is to use String.format (). Reverse a string in JavaObjects of String are immutable.String class in Java does not have reverse () method, however StringBuilder class has built in reverse () method.StringBuilder class do not have toCharArray () method, while String class does have toCharArray () method. If you have any doubt or any suggestions to make please drop a comment. It concatenates the other operand to String and returns a String object. This is one of the simplest way to convert any data type into string in Java. How to convert Java Double to String? This tutorial shall go over how to convert a String to a Double in Java. By using String.valueOf () Method. In the signature of the format() method Using Double.toString(), if the number is too small or too large, you will get a scientific notation like this: 3.4875546345347673E-6. Ill post more code, basically when the user touches the edittext box i want the information to calculate a fill the edittext box. It contains well written, well thought and well explained computer science and programming articles, quizzes and practice/competitive programming/company interview Questions. The append() method is used to append the string representation of the double argument to this sequence. 2. Mary has graduated from Mechanical Engineering department at ShangHai JiaoTong University. Example : In this example, double variable d is converted to string using valueOf method. The valueOf () method is a part of String class. In many GUI based application also, if we have to display double value in text field we may need to convert. The Java class Double contains a static method that will do what you're looking for. Use dedicated JDK func instead. The comment form collects your name, email and content to allow us keep track of the comments placed on the website. reverse; convert double to string in Java. Why would Henry want to close the breach? How to Convert Double to String to Double in Java? The aim is to transform a String into a Double in Java. The valueOf() method is used in Java to convert double to string. You can convert a String to double in three different methods. Each of the Number subclass (Integer, Float, Double etc.) There must be something else, this should work just fine. Example-1 double type double a = 3.123456789 double b = 3.5E02. Advertisement. possible, I am trying to do this in an onTouchListener. You're creating a new. double total = 44; String total2 = total + ""; 2. Ready to optimize your JavaScript with Rust? Converting between Numbers and Strings Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. Seems fine to me, what problem have you encountered? The list below shows eight different ways in which we can convert double to string. We learned in detail about this approaches with an example. This is a very old post, but this may be the easiest way to convert it: One of those is throwing the exception. If my articles on GoLinuxCloud has helped you, kindly consider buying me a coffee as a token of appreciation. f19Rw -to[{;gV[v)ehiV7=_`ewv@,[*tc2XTtte. Example : In this example, we will use the access specifier "%f" as the value to format is a double type. JCGs (Java Code Geeks) is an independent online community focused on creating the ultimate Java to Java developers resource center; targeted at the technical architect, technical team lead (senior developer), project manager and junior developers alike. Why is char[] preferred over String for passwords? I'm guessing you have other code that you are not showing in your example that is causing that exception to be thrown. Home Core Java How to Convert Double to String in Java, Posted by: Mary Zheng In this step, I will create a StringBuilderTest class with two tests. ultoa () Convert unsigned long into a stringStandardsFormatGeneral description. The ultoa () function coverts the unsigned long l into a character string. Returned value. String pointer (same as buffer) will be returned. When passed an invalid radix argument, function will return NULL and set errno to EINVAL.Portability considerations. This is a non-standard function. Example How to convert double to string in java: Before going into the program, lets see some examples of both the types. We should invoke this with a Double object. Enjoy unlimited access on 5500+ Hand Picked Quality Video Courses. How do I convert a String to an int in Java? These are various symbols that are supported as part of pattern in DecimalFomat. You can use String.valueOf() for float, double, int, boolean etc. How to set a newcommand to be incompressible by justification? We can also get string representation with specified decimal places and rounding of half-up. Convert a String to a double type number in Java, Java Program to convert Double into String using toString() method of Double class. WebTo convert primitive type double to string in Java, we use valueOf() method of the String class. @Muhammed well, you're creating an object just to get its String value. Store that string value in a variable output . Connect and share knowledge within a single location that is structured and easy to search. Convert Double to String by Using the toString() Method in Java Convert Double to String by Using the format() Method in Java Convert Double to String by Using double.toString() should work. The exception probably comes from the parseDouble() calls. In this article we will see how to convert a character to string. Using toString () method of Double class. Strings Class a little different. In this step, I will create a DoubleTest class with four test methods. Convert double value to string in Java; Java Program to convert String to Double; Java methods to convert Double How to convert a double to a string in java: Double can be converted to string by using She also holds a Master degree in Computer Science from Webster University. Write a Java program to convert the given double number into an Integer (int) in Java. In this approach, we are using append method of StringBuffer class. Using the parseDouble() method of Double class; Using valueOf() method of Double class; Using constructor of Approach 1: JCGs serve the Java, SOA, Agile and Telecom communities with daily news written by domain experts, articles, tutorials, reviews, announcements, code snippets and open source projects. See the example below. Examples Java Code Geeks is not connected to Oracle Corporation and is not sponsored by Oracle Corporation. /~_/E;4ygX[pG>zVz This is the simplest approach for converting double to a string. There are several ways to have more control of output string format. WebComplete the Java method convertBinaryStrToDecimal (String s) to convert an input of binary string s to the equivalent decimal number using "for loop". parseDouble() method, Double. 1. In this approach, we are using Double class to convert double value to a string. Get hold of all the important Java fundamentals with the Simple java program example guide and practice well. String.valueOf() is a method which will simply typecasts below-given parameter to strings always. In the post converting String to double in Java we have already seen ways to do that conversion. Note: "1010" is just an example. Moreover, we can also get string representation with specified decimal places and rounding up the double number. In java, double is a primitive data type whereas Double is a wrapper class. Spring code examples. Double.toString(double) can't even throw NumberFormatException - are you sure the exception isn't being thrown from somewhere else? Where the "" + < variable > will convert it to string automaticly. StringBuilder Class what "total"? I am trying to do this in an onTouchListener. parseDouble() method, Double. If this were in a loop of some kind, you could experience a lot of additional (unnecessary) overhead. In this step, I will create a StringTest class with eight methods. WebThanks for watching this videoPlease Like share & Subscribe to my channel It comes with a bunch of useful functions for double manipulation and computations. As this is not a static method, we cannot call this using its class name like Double.longValue (). strtod function. (Convert String to Double) In the C Programming Language, the strtod function converts a string to a double. The strtod function skips all white-space characters at the beginning of the string, converts the subsequent characters as part of the number, and then stops when it encounters the first character that isn't a number. Each of the Number subclasses includes a class method, toString(), that will convert its primitive type to a string. In this approach, we are using the DecimalFormat class to convert double to String. in Core Java Here we are using this directly to convert the Double to string itself . To learn more, visit Java autoboxing and unboxing.. That is, Convert Double to String by Using the + Operator in Java. Design WebJava Convert String to double using the constructor of Double class. Tabularray table when is wraped by a tcolorbox spreads inside right margin overrides page borders. static String primitive type to a string. rev2022.12.9.43105. Convert double to string in java: In the previous article we have discussed Java Program to Convert float to String. We can use BigDecimal s setScale method to tell whether we want to round or truncate: double largeDouble = 345_345_345_345.56 ; BigDecimal big = new BigDecimal WebTo convert a string to a double numeric value, we normally use Double.valueOf () method of Java Double class. Does balls to the wall mean full speed ahead or full speed ahead and nosedive? it will return the decimal value 10.0. have the following in mind if total = 1234567890123456 then the String becomes "1.234567890123456E15" which is very often not what you want. WebIn Java, we can convert double into a String in the following two ways: by using String.valueOf () method. The java.lang.String class includes two methods to convert a double to String. The quick and dirty way is to use a formatted String and specify the number of decimal points. With the implicit auto-boxing, a Double object is created with Double d=12345.34. Your original code snippit couldn't throw that exception. We can use Double class toString method to get the string representation of double in decimal points. Commentdocument.getElementById("comment").setAttribute( "id", "a9a466158921ee62d80e0e36c6b35d89" );document.getElementById("gd19b63e6e").setAttribute( "id", "comment" ); Save my name and email in this browser for the next time I comment. December 8th, 2020 How to convert a double to a string in java: Double can be converted to string by using valueOf() lets see how it works. I am puzzled by your seeing the NumberFormatException. Learn more. to stay connected and get the latest updates. Using + operator. This example shows how to convert int to String, long to String, float to String, double to String, boolean to String, char to String, short to String and byte to String.. How to convert primitive to String in Java? Lets say we have the following double value . Double can be converted to string by using format() method, lets see how it actually works. This will also work for any data type. Whenever we use print statement in java, toString() method of Objectclass in java is always called. // Double object Double ob = new Double (val); Double is a wrapper class in Java that is used to Examples Java Code Geeks and all content copyright 2010-2022. 5 Ways to Connect Wireless Headphones to TV. There are different kinds of methods to convert double data to string data. This is called unboxing in Java. Not the variable type Double, but the variable itself double. WebThere are several ways to convert double type data to a string. I've been doing this for like all my time as a java programmer lol. Using the constructor of Double wrapper class that takes String as its parameter. This post is about doing just the The java.lang.Double class has two methods to convert a double to String. Are there breakers which can be triggered by an external signal and have to be reset by hand? Method 1 : Java Program to Convert double to String Using valueOf() method. 0 The java.text.DecimalFormat class provides a method to format a Double into a String with the formatting pattern. Surface Studio vs iMac Which Should You Pick? you should consider that sometimes it will return number with E scientific notation like -2.23561E5, Very bad habit to stringify by adding to an empty String. A java.lang.Double class represents a floating-point number and java.lang.String class represents a sequence of characters. In this step, I will create a DecimalFormatTest class with five methods. Lets look at a few examples. If you use f instead of d value may be You need to add some logging/printing to see what's in volGal and priceGal - it's not what you think. Surface Studio vs iMac Which Should You Pick? How long does it take to fill up the tank? Converting the above double value to string. How could my characters be tricked into thinking they are on Mars? In this approach, we are using append method of StringBuilder class. The java.lang.StringBuffer class has the append method to convert a double into a StringBuffer. Note: The constructor Double(String) is deprecated since Java version 9. Although, this approach is deprecated from Java version 9, it can be used in the older versions. those lines work perfect. but when it is in the ontouchlistener it throws the error. String toString () Returns a string representation of this Double object. You can use .toString directly on any data type in kotlin, like. @Muhammed - no, it's not efficient. Use String.format() will be the best convenient way. Beginners and experienced programmers can rely on these Best Java Programs Examples and code various basic and complex logics in the Java programming language with ease. The knowledge of converting double value to a String in Java is very useful while working on real time applications. Unless there is some compile-time optimization at play, it would call an additional constructor and append method. I get error NumberFormatException when trying to convert this. Conversion Modes. Find centralized, trusted content and collaborate around the technologies you use most. Can't use getText() for double but what to use? Lets say the following is our double primitive. The java.lang.Double class has two methods to convert a double to String. See glowcoder's comment. The two calls I show above can. Here, if we concatenate any value to the string, the result will be a string type. Example: 1. Double can be converted to string by using + operator. Double.toString() We can use Double class toString method to get the string ezYs RfJZcLd;;ws@XZjwuUw>ogul2? you can see that second argument is a vararg which is of type Object. Convert string (varchar) to double in MySQL, Convert double primitive type to a Double object in Java, Golang Program to convert string variables to double. In this article, we learned how to Convert a Double to String in Java. is that the real code your are executing? Java language provides a Double and String types. Views. Method returns string representation of the passed double argument. We make use of First and third party cookies to improve our user experience. String class has valueOf() method which is overloaded and those variants take int, float, double, long data By using this website, you agree with our Cookies Policy. I'm guessing you have other code that you are not showing in your example that is causing that exception to be thrown. Webdouble doubleVal = Convert.ToDouble("855.65"); In the above statement, we have passed a number i.e. WebThere are three ways to convert a String to double value in Java, Double. Look at the stack trace. The java.lang.StringBuilder has the append method to convert a double into a StringBuilder. There are multiple ways to do the double-string conversion. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Master the Go Programming Language (Golang) and Get job-ready. There are two ways in which String data can be converted into double. You can convert a double value into a String by Similarly, for String discountStr = +30.0005d; String +30.0005d can be converted to double using parseDouble () method as: double discount = Double. I am not sure it is me or what but I am having a problem converting a double to string. There are several ways in which Java primitive data types can T!-yG6wMngOHB%HHlKs6>- 3yf ~{BLYz~FE*zd|~V&esktvR:RS >%g3UJzJgJ"}HDd 22/lVV3y]z?uDE< HZ12T,~Prh*~?,qsbI/.DLzm"=r64(#O`x$~d.qTJH/Rq.;W2xk'VI?q&$uptty|/]\^\.////^nFhtyxx8zxx''j*TF^OYej}S2&S*RoO"5%8eIz:U@RvJ$Z&)d9B33W W;9uU&f6tx?9~7U9<8*we*H`Qw$UbtF_w&%oP'>(TgE0lUBq/|p@o" y*EM$%d^vcyEl'G3jT;^ 7g{V[>Xd)7GK>,*,~)H@h'MKZ35ppWvaw;,M:37\,) ed1RgK2z]mz\{44QeYL(p%',I,tXi`Yzc*3%$ AQE{O$Y=U4kdA.nTbZ It is a static method that converts a double into a String value. ok ill get that changed. Example-2: String type String a = "BtechGeeks"; String b = "B"; Lets see different ways to convert double type to String type. All trademarks and registered trademarks appearing on Java Code Geeks are the property of their respective owners. The method String.valueOf() converts double to string. I am puzzled by your seeing the NumberFormatException. by using Double.toString () method. More Detail. Check that the values given to that function really reflect a double. WebThere are three ways to convert a String to double value in Java, Double. One of your. For example, you can convert Java double to string quite effectively using its wrapper object. This site uses Akismet to reduce spam. We can use StringBuilder and StringBuffer append function to convert double to string. Asking for help, clarification, or responding to other answers. How to split String into Array [Practical Examples], How to initialize List in Java [Practical Examples], Bitwise Operators in Java Explained [Practical Examples], How to get sublist from a list in Java [Practical Examples], Java Variables Examples [Different Variable Types], 1-100 Java Interview Questions and Answers, 101-200 Java Interview Questions and Answers. There are three ways to convert double to String. DecimalFormat Class For example, after you call the method convertBinaryStrToDecimal ("1010"). Did neanderthals need vitamin C from the diet? All in all, this tutorial, covers everything that you need to know in order to have a clear view on conversion of double value to a string object in Java. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. She works as a senior Software Engineer in the telecommunications sector where she acts as a leader and works with others to design, implement, and monitor the software solution. WebIn this article, we will show you how to convert Java double to String code examples. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. The list below shows eight different ways in which we can convert double to string. Double constructor with double argument has been deprecated in Java 9, but you should know it. Different Ways for Converting String to Double. WebTo convert double type to string, we can use the valueOf() method of String class or toString() method of the Double class. So, we will use the same concept here to convert a double type into a string in Java. As we know that java supports auto-boxing, so we can use double and Double interchangeably in most of the cases. Using Double.parseDouble(String) method; Convert String to Double in Java using Double.valueOf(String) For example, after you Here's how you can easily format a number, such as a double into a currency String: double currencyAmount = 1500.00 ; // Create a new Locale Locale usa = new Locale ( "en", "US" ); // Create a Currency instance for the Locale Currency dollars = Currency.getInstance (usa); // Create a formatter given the Locale NumberFormat Here, the valueOf() method actually returns an object of the Double class. As per the requirement of an application, we can choose an appropriate approach for conversion. How to convert a double value into a Java String using format method? Performing conversion from wrapper class Double or primitive type double to String is a common scenario when programming with Core Java. This is the easiest way to convert double to string in java. They are: Using the static method parseDouble (String) of the java.lang.Double wrapper class. Below code snippet shows you how to use it to convert double to string in java. Resolving errors when trying to multiply integer arrays, How to generate a random alpha-numeric string. Lets see different ways to convert double type to String type. Here are a few examples: double d = 10.0; double s = 10.0; double t = 00); double r = 10.0; double s2 = 00); In this approach, we are using constructor of double class to initialize with double value and then use toString() method to convert double object to the string. Example : In this example, we concatenate blank string "" with double variable d. In this approach, we are using valueOf method of String class that converts values passed as a parameter into a string. In this step, I will create a StringBufferTest class with two tests. \mw Site design / logo 2022 Stack Exchange Inc; user contributions licensed under CC BY-SA. You can convert double to string in Java by various simple methods. 855.65 as a string to ToDouble () method which will be converted to double by the method and the resulted value will be stored in a variable of type double (doubleVal). A Computer Science portal for geeks. I'm not a big fan of premature optimization, but I am a fan of avoiding obvious deficiencies. That's all for this topic Convert double to String in Java. This is a very old post, but java double to string conversion can be done in many ways, I will go through them one by one with example code snippets. Why was USB 1.0 incredibly slow even for its time? StringBuffer Class, Didn't find what you were looking for? Is it correct to say "The glue on the back of the sticker is dying down so I can not stick the sticker to the wall"? How do I arrange multiple quotations (each with multiple lines) vertically (with a line through the center) so that they're side-by-side? double d = 123.45d; String str = d+""; // str is '123.45' Double.toString() We can use Double class How to convert a double value into a Java String using append method. A Computer Science portal for geeks. Double.toString(doubleValue) You could When you would like to format the decimal and convert it to a String DecimalFormat helps much. To convert a Double object to Long object this method is suitable. However, using double quotes is very common way to convert values to strings. WebLearn how to convert a Java String value into Double value in Java by using the valueOf() method, parseDouble() method with code examples. Using valueOf(double d) method you can convert double to String in Java. Using the static method valueOf (String) of the java.lang.Double wrapper class. How to convert double to string in java: Before going into the program, lets see some examples of both the types. It is a static method and is used to convert a String into a double. Learn how your comment data is processed. It is an inbuilt method of String class in java. How to convert a double value to String in Java? valueOf() method and by using new Double() constructor and then storing resulting object into a primitive double field, autoboxing in Java will convert a Double object to the double primitive in no time. This example shows how to convert Java primitive data type to String. Always use String.valueOf(dd) instead. Here are common formatting characters: Please click here to see the completed formatting characters. Here note that .2f is used as format so there will be 2 decimal places. Do non-Segwit nodes reject Segwit transactions with invalid signature? I am trying to do this in an onTouchListener. Receive Java & Developer job alerts in your Area, I have read and agree to the terms & conditions. Perform a quick search across GoLinuxCloud. Example : In this example, we will use the append() method to add double value and toString() method to convert it to string. It converts a double to a string using the calls you tried. That will give you a string value, In several applications, we may need to convert a number to a string because we need to operate on the value in its string form. In this example, I will demonstrate how to convert a Double to String by utilizing the following classes: The example code in this article was built and run using: I will create five test classes to demonstrate how to convert a Double to String. Example 1: Am i doing something wrong or am i missing a step here. We can use DecimalFormat class to convert double to String. How to Pass the double value into the text field using Jbutton in java? How to get an enum value from a string value in Java, Converting ISO 8601-compliant String to java.util.Date, Converting 'ArrayList to 'String[]' in Java. 2. If you see the "cross", you're on the right track, Disconnect vertical tab connector from PCB, Penrose diagram of hypothetical astrophysical white hole, What is this fallacy: Perfection is impossible, therefore imperfection should be overlooked. WebIn this tutorial, I will show you how to convert a double value to string without the exponential part. During her studies she has been involved with a large number of projects ranging from programming and software engineering. This is the easiest way to convert double to string in java. How to convert a Double array to a String array in java? Java Program to Convert a File to Byte Array, How to Format Date in Java Using SimpleDateFormat, How to Convert Date And Time Between Different Time-Zones in Java, Creating Tar File And GZipping Multiple Files in Java, Java Program to Get All The Tables in a DB Schema, How to Find The Longest Palindrome in The Given String, How to Create PDF From XML in Java Using Apache FOP, How to Run a Shell Script From Java Program. To learn more, see our tips on writing great answers. How do I read / convert an InputStream into a String in Java? Affordable solution to train a team and make them project ready. Design Java is a trademark or registered trademark of Oracle Corporation in the United States and other countries. Lets see how it actually works. Example :In this example, we are using toString method of Double class for conversion. Look at the stack trace. Converting double to String in Java using valueOf() method. It contains well written, well thought and well explained computer science and programming articles, quizzes and WebJava, inside a method, cannot convert double to string. conversion is handled for you. Easiest way to convert double to a string in Java is to concatenate double with an empty string. Notify me via e-mail if anyone answers my comment. I changed the total to a hard number like 44 and it still gave me an error. Help us identify new roles for community members, Proposing a Community-Specific Closure Reason for non-English content, Java: ReplaceAll String with another string, Properly converting a double variable to string, How to cast string to double android calculator App, Java double calculate and convert to String. 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