July 10, 2021 - But what if the strings were in a different format ( like 1,323.122 ), then all of the above methods will fail to parse the string and convert it into a double value. This is where the DecimalFormat class comes into the picture as shown below · import java.text.DecimalFormat; import java.text.ParseException; public class Codekru { public static void main(String[] args) { try { String str1 = "1,323.122"; String str2 = "-23,456"; String str3 = "3456789"; double d1 = DecimalFormat.getNumberInstance().parse(str1).doubleValue(); double d2 = DecimalFormat.getNumberInstance().parse(str2).doubleValue(); double d3 = DecimalFormat.getNumberInstance().parse(str3).doubleValue(); System.out.println("d1 value is: " + d1); System.out.println("d2 value is: " + d2); System.out.println("d3 value is: " + d3); } catch (ParseException e) { e.printStackTrace(); } } }

Become a certified Java programmer. Try Programiz PRO! ... class Main { public static void main(String[] args) { // create string variables String str1 = "23"; String str2 = "456.6"; // convert string to double // using parseDouble() double num1 = Double.parseDouble(str1); double num2 = Double.parseDouble(str2); // print double values System.out.println(num1); // 23.0 System.out.println(num2); // 456.6 } }

March 21, 2023 - Converting double to String is a common task in Java programming. In many cases, you may need to convert a double value to a String to display it in a user interface, write it to a file, or pass it as an argument to a method that expects a String. Java provides several methods for converting a double to String, including String.valueOf(), Double.toString(), and formatting options.

Just make sure that empty String literal i.e. "" should be the first argument or else + operator will do addition instead of String concatenation. The second method is mainly for the Double objects, but don't worry even if you have a double value you can leverage autoboxing to first convert it into a Double object and then just call the toString() method on it to get an equivalent String in Java.

March 4, 2025 - One of the simplest ways to convert a double to a String in Java is by utilizing the String.valueOf() method.

October 18, 2025 - Learn 4 simple ways to convert a String to Double in Java. Explore examples using Double.parseDouble(), valueOf(), Scanner methods, and more. Read now!

August 3, 2022 - We can parse String to double using parseDouble() method. String can start with “-” to denote negative number or “+” to denote positive number. Also any trailing 0s are removed from the double value. We can also have “d” as identifier that string is a double value.

July 6, 2024 - Another way to format the number is to use the DecimalFormat class from Java. DecimalFormat is a subclass of NumberFormat designed specifically for formatting decimal numbers. Unlike NumberFormat, a general-purpose formatting class supporting various formats like numbers and currencies, DecimalFormat provides finer control over formatting details such as decimal places, separators, symbols, and more. Let’s look at how we can use DecimalFormat to convert our double to string format:

Java Examples Java Videos Java Compiler Java Exercises Java Quiz Java Code Challenges Java Server Java Syllabus Java Study Plan Java Interview Q&A Java Certificate ... Type casting means converting one data type into another. For example, turning an int into a double. ... Widening Casting (automatic) - converting a smaller type to a larger type size byte -> short -> char -> int -> long -> float -> double

July 23, 2025 - In above program we are converting num(Double) to String using '+' Operator. There are different kinds of methods to convert double data to string data.

January 19, 2022 - You need to enable JavaScript to run this app

January 8, 2024 - In this tutorial, we looked at the different ways in which we can convert a double to a String while removing decimal places.

May 17, 2021 - java.lang.string cannot be converted to double · r/learnprogramming • · r/learnprogramming · A subreddit for all questions related to programming in any language. Weekly visitors · Weekly contributions · comments · Double.ToString() ...

April 1, 2025 - In this tutorial, we will learn to convert Java string to double data type using four different methods along with programming examples.

January 4, 2024 - There are various methods to convert string to double values and each method has specific purpose. Java offers a straightforward method, Double.parseDouble(), specifically designed to convert strings containing numeric representations into their double counterparts.

January 11, 2024 - This conversion, facilitated by autoboxing, seamlessly allows interchangeability between the double primitive type and Double objects without complications. String.valueOf() is an inbuilt method of String class in Java which converts different parameters to string.

February 19, 2025 - Double.parseDouble() is the fastest and most commonly used method for string-to-double conversion in Java.

August 3, 2022 - However java supports autoboxing, so they both can be used interchangeably in most of the cases. This is the easiest way to convert double to string in java.

September 8, 2013 - Manually converting a string to double.. ... Hi deBiidpOL and welcome to bytes.com! The String class has several useful functions, the best for this problem is probably charAt(int). This will return the character represented at a certain position in the string, so for example [code=java]"123.456".charA t(1)[/url] would be a '2' (as it starts counting with 0).

Lets see the complete example of the conversion using parseDouble(String) method. public class JavaExample{ public static void main(String args[]){ String str = "122.202"; /* Convert String to double using * parseDouble(String) method of Double * wrapper class */ double dnum = Double.parse...