Java Convert BigDecimal to Double

In this post, I will be sharing how to convert BigDecimal to Double in Java with examples. We can achieve our goal using BigDecimal class doubleValue() method. Let's dive deep into the topic:

Read Also: Convert BigInteger to BigDecimal in Java

Java Convert BigDecimal to Double

1. Using BigDecimal class doubleValue() method

You can easily convert BigDecimal to Double in Java using BigDecimal class doubleValue() method as shown below in the example.

 import java.math.BigDecimal;

public class BigDecimalToDouble {
    public static void main(String args[]) {
      // Creating BigDecimal object using Constructor
      BigDecimal bd = new BigDecimal("3456.78912");
      // Converting BigDecimal to Double using doubleValue()
      Double doubleObj = bd.doubleValue();
      // Printing Double
      System.out.println("Converted BigDecimal to Double: " + doubleObj);
    }
}

Output:
Converted BigDecimal to Double: 3456.78912

Converting BigDecimal to Double with 2 Decimal places

After converting BigDecimal to Double, you can easily restrict the Double to 2 decimal places by using BigDecimal class setScale() method as shown below in the example.

Note: Just like String, BigDecimal objects are immutable. Calls of setScale(int newScale, RoundingMode roundingMode) method do not result in the original object being modified.

 import java.math.BigDecimal;
import java.math.RoundingMode;

public class BigDecimalToDouble2 {
    public static void main(String args[]) {
       // Instantiating BigDecimal using Constructor
       BigDecimal bd = new BigDecimal("456.789123");
       // Setting Decimal places to 2 using setScale() method
       bd = bd.setScale(2, RoundingMode.HALF_DOWN);
       // Converting BigDecimal to Double with 2 Decimal places 
       Double doubleObj = bd.doubleValue();
      // Displaying Double
      System.out.println("Converted BigDecimal to Double: " + doubleObj);
    }
}

Output:
Converted BigDecimal to Double: 456.79

That's all for today, please mention in the comments in case you know any other way of converting BigDecimal to Double in Java.

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Java Convert BigDecimal to Double