The java.math.BigDecimal.doubleValue() is an in-built function which converts the BigDecimal object to a double. This function converts the BigDecimal to Double.NEGATIVE_INFINITY or Double.POSITIVE_INFINITY as appropriate or according to the passed object, if its magnitude is too big to be represented as a double.
Note: The information about the decimal precision of the Double value of the given BigDecimal value can be lost even if the return value is finite.
Syntax:
public double doubleValue()
Parameters: The method does not accept any parameters.
Return Value: This method returns the double value of this BigDecimal Object.
Examples:
Input : 11234 Output : 11234.0 Input : 2679.30000 Output : 2679.3
Below programs illustrates the use of byteValueExact() Function:
Program 1:
// Java program to demonstrate doubleValue() methodimport java.io.*;import java.math.*;  public class GFG {      public static void main(String[] args)    {          // Creating a BigDecimal object        BigDecimal big;          // Creating a Double object        Double dob;          big = new BigDecimal("4743");          // Assigning the converted value of bg to d        dob = big.doubleValue();          // Printing the corresponding double value        System.out.println("Double value of " + big + " is " + dob);    }} |
Double value of 4743 is 4743.0
Program 2:
// Java program to demonstrate doubleValue() methodimport java.io.*;import java.math.*;  public class GFG {      public static void main(String[] args)    {          // Creating a BigDecimal object        BigDecimal big;          // Creating a Double object        Double dob;          big = new BigDecimal("6714592679.34008");          // Assigning the converted value of bg to d        dob = big.doubleValue();          // Printing the corresponding double value        System.out.println("Double value of " + big + " is " + dob);    }} |
Double value of 6714592679.34008 is 6.71459267934008E9
Reference:https://docs.oracle.com/javase/7/docs/api/java/math/BigDecimal.html#doubleValue()
