Java Double - valueOf() Method

The java.lang.Double.valueOf() method returns a Double object holding the double value represented by the argument string s. If s is null, then a NullPointerException is thrown.

Leading and trailing whitespace characters in s are ignored. Whitespace is removed as if by the String.trim() method; that is, both ASCII space and control characters are removed. The rest of s should constitute a FloatValue as described by the lexical syntax rules.

Syntax

public static Double valueOf(String s)
                     throws NumberFormatException

Parameters

Return Value

Returns a Double object holding the value represented by the String argument.

Exception

Throws NumberFormatException, if the string does not contain a parsable number.

Example:

In the example below, the java.lang.Double.valueOf() method returns a Double object holding the value given by the specified String.

import java.lang.*;

public class MyClass {
  public static void main(String[] args) {
    
    //creating a string holding double value
    String x = "25.2";

    //creating Double object
    Double y = Double.valueOf(x);

    //printing the string
    System.out.println("The string is: " + x); 

    //printing the Double object 
    System.out.println("The Double object is: " + y);   
  }
}

The output of the above code will be:

The string is: 25.2
The Double object is: 25.2