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Read through this article to understand other ways of conversion with Java code examples. This will return the primitive double and not the Double object as the result of conversion.ĭo note that the input String should be numeric only, non-numeric characters except -, d and D will result in a NumberFormatException at runtime. You can convert a String to a double in Java using the Double.parseDouble method by providing the String as a method parameter. How do I convert a String to a double in Java?
#CONVERT STRING TO DOUBLE JAVA HOW TO#
Let’s look at some of the Frequently Asked Questions about How to Convert a String to a double / Double in Java. (Double.valueOf("-1234.56D")) Ī quick diagrammatic summary of the different ways to convert String to long in Java is represented below – Convert a String to a Double in Java FAQs about How to Convert a String to a Double in Java Let’s look at code examples for parseDouble usage. The class provides a static method parseDouble() which takes a single String as a method parameter and returns the primitive double equivalent of that String. There are multiple ways to perform such data type conversions in Java. Whether you are taking inputs from users on attendance of students per day in a class for calculating the average student attendance per month or whether you are taking grocery expenditure inputs from a user for calculating total spend including taxes or any other scientific calculations, you will find yourself having to frequently convert user input Strings to double or Double in Java for numerous calculations. It is an extremely common use case in Java programs to convert a String to a double or Double in Java.
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String and double / Double are data types in Java. Objective of this tutorial is to learn about how to convert a String to a Double in Java.