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Conversion from String to Double in Java

Java conversion from String to Double: Here, we are going to learn how to convert a given string value to a double in Java?
Submitted by IncludeHelp, on July 16, 2019

Problem statement

Given a string value and we have to convert it into a double.

Java conversion from String to Double

To convert a String to Double, we can use the following methods of Double class (see the syntax given below...)

Syntax

Double Double.valueOf(String).doubleValue();
OR
Double Double.parseDouble(String);

Java program to convert a String to Double

//Java code to convert String to Double
public class Main {
    public static void main(String args[]) {
        String str = "12345.87878d";

        //variable to store result
        double result = 0;

        //converting string to double
        //method 1
        result = Double.valueOf(str).doubleValue();
        System.out.println("result (value of str as double) = " + result);

        //method 2
        result = Double.parseDouble(str);
        System.out.println("result (value of str as double) = " + result);
    }
}

Output

result (value of str as double) = 12345.87878
result (value of str as double) = 12345.87878

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