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# BigDecimal toBigIntegerExact() Method in Java

• Last Updated : 04 Dec, 2018

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
```

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