Java bigdecimal ulp example
Example below demonstrates working of bigdecimal
class ulp method. Method returns bigdecimal
values. Method returns the size of an ulp. which is the size of a unit at
the last place of the bigdecimal object value.
Method returns +1 for a positive bigdecimal
value. Actually this ulp size is the difference between the bigdecimal
value and just the next number after the bigdecimal value.
For example, if the bigdecimal value is 4 then
its next value is 5, and there difference that is one, is the value that the ulp
method generates.
The scale of the result will be same as that of the this.object
value.
Method represents the bigdecimal object value in
scientific notations if required. For example if method generates 5E-5, then it
means 5 * ten to the power minus 5.
Method generates NumberFormatException, if it finds
the bigdecimal value other than integers and double
types values.
Syntax for using the method: public
BigDecimal ulp()
Suppose we have bigdecimal objects x & y;
then y = x.ulp();
System.out.println(y);
Java_bigdecimal_ulp.java
import java.math.BigDecimal;
import java.math.BigInteger;
import java.math.MathContext;
public class Java_bigdecimal_ulp {
public static void main(String args[]) {
BigDecimal nc = new BigDecimal(0);
System.out.println(" BigDecimal value :" + nc
+ "\nmethod generating result :" + nc.ulp());
nc = new BigDecimal(2);
System.out.println("\n BigDecimal value :" + nc
+ "\nmethod generating result :" + nc.ulp());
nc = new BigDecimal(3.1);
System.out.println("\n BigDecimal value :" + nc
+ "\nmethod generating result :" + nc.ulp());
nc = new BigDecimal(4000);
System.out.println("\n BigDecimal value :" + nc
+ "\nmethod generating result :" + nc.ulp());
}
}
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