BigDecimal toBigIntegerExact() Method in Java

The java.math.BigDecimal.toBigIntegerExact() is an inbuilt method in java that converts this BigDecimal to a BigInteger, checking for lost information. An exception is thrown if this BigDecimal has a nonzero fractional part.

Syntax:

public BigInteger toBigIntegerExact()

Parameters: The method does not take any parameters.

Return value: This method returns the value of BigDecimal object converted to a BigInteger.

Examples:

Input: (BigDecimal) 1213
Output: (BigInteger) 1213

Input: (BigDecimal) 12785412
Output: (BigInteger) 12785412

Below programs illustrates the working of the above mentioned method:
Program 1:

// Program to demonstrate toBigIntegerExact() method of BigDecimal

import java.math.*;

public class gfg {

    public static void main(String[] args)
    {

        // Assigning BigDecimal b
        BigDecimal b = new BigDecimal("1213");

        // Assigning the BigIntegerExact value of BigInteger b to  BigInteger  i
        BigInteger i = b.toBigIntegerExact();

        // Printing i value
        System.out.println("BigInteger value of " + b + " is " + i);
    }
}

Output:

BigInteger value of 1213 is 1213

Program 2:

// Program to demonstrate toBigIntegerExact() method of BigDecimal

import java.math.*;

public class gfg {

    public static void main(String[] args)
    {

        // Assigning BigDecimal b
        BigDecimal b = new BigDecimal("12785412");

        // Assigning the BigIntegerExact value of BigInteger b to  BigInteger  i
        BigInteger i = b.toBigIntegerExact();

        // Printing i value
        System.out.println("BigInteger value of " + b + " is " + i);
    }
}

Output:

BigInteger value of 12785412 is 12785412