What is BigDecimal.intValueExact() method in Java?
BigDecimal is an immutable arbitrary-precision signed decimal number. It contains an arbitrary precision integer unscaled value and a 32-bit integer scale. For example, in the value 10.11, 1011 is the unscaled value, and 2 is the scale. The BigDecimal class provides operations for arithmetic, scale manipulation, rounding, comparison, hashing, and format conversion. Read more about BigDecimal class here.
The intValueExact method of the BigDecimal class converts the value of the BigDecimal to an int value.
An ArithmeticException is thrown:
- If the value contains non-zero fractional parts.
- If the value is larger than the maximum value an
inttype can hold.
Syntax
public int intValueExact()
This method doesn’t take any arguments.
This method returns the BigDecimal value as an int value.
Code
The code below demonstrates how to use the intValueExact method:
import java.math.BigDecimal;
class IntValueExact {
public static void main( String args[] ) {
BigDecimal val1 = new BigDecimal("10");
BigDecimal val2 = new BigDecimal("10.10");
BigDecimal val3 = new BigDecimal("2147483647");
System.out.println("IntValueExact of " + val1 + " : "+ val1.intValueExact());
try{
System.out.println("IntValueExact of " + val2 + " : "+ val2.intValueExact());
} catch(Exception e) {
System.out.println("\nException while converting the " + val2 + " - \n" + e);
}
try{
System.out.println("IntValueExact of " + val3 + " : "+ val3.intValueExact());
} catch(Exception e) {
System.out.println("\nException while converting the " + val3 + " - \n" + e);
}
}
}Explanation
In the code above,
-
We create three
BigDecimalobjectsval1,val2, andval3with values10,10.10, and2147483647, respectively. -
We call the
intValueExactmethod of theval1object. This will return theBigDecimalvalue asint. The value10can be stored inintand has no non-zero fractions, so there will be no exception. -
We call the
intValueExactmethod of theval2object. The value10.10contains a non-zero fractional part, so anArithmeticExceptionis thrown. -
We call the
intValueExactmethod of theval3object. The value2147483647is too large to be stored inint, so anArithmeticExceptionis thrown.
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