Scanner nextBigDecimal() method in Java with Examples
Last Updated :
12 Oct, 2018
The
nextBigDecimal() method of
java.util.Scanner class scans the next token of the input as a BigDecimal. If the next token matches the Decimal regular expression defined above then the token is converted into a BigDecimal value as if by removing all group separators, mapping non-ASCII digits into ASCII digits via the Character.digit, and passing the resulting string to the BigDecimal(String) constructor.
Syntax:
public BigDecimal nextBigDecimal()
Parameters: The function does not accepts any parameter.
Return Value: This function returns the
BigDecimal scanned from the input.
Exceptions: The function throws three exceptions as described below:
- InputMismatchException: if the next token is not a valid BigDecimal or is out of range
- NoSuchElementException: throws if input is exhausted
- IllegalStateException: throws if this scanner is closed
Below programs illustrate the above function:
Program 1:
Java
// Java program to illustrate the
// nextBigDecimal() method of Scanner class in Java
// without parameter
import java.util.*;
public class GFG1 {
public static void main(String[] argv)
throws Exception
{
String s = "Gfg 9 + 6 = 12.0";
// create a new scanner
// with the specified String Object
Scanner scanner = new Scanner(s);
while (scanner.hasNext()) {
// if the next is a BigDecimal,
// print found and the BigDecimal
if (scanner.hasNextBigDecimal()) {
System.out.println("Found BigDecimal value :"
+ scanner.nextBigDecimal());
}
// if no BigDecimal is found,
// print "Not Found:" and the token
else {
System.out.println("Not found BigDecimal() value :"
+ scanner.next());
}
}
scanner.close();
}
}
Output:
Not found BigDecimal() value :Gfg
Found BigDecimal value :9
Not found BigDecimal() value :+
Found BigDecimal value :6
Not found BigDecimal() value :=
Found BigDecimal value :12.0
Program 2: To demonstrate InputMismatchException
Java
// Java program to illustrate the
// nextBigDecimal() method of Scanner class in Java
// InputMismatchException
import java.util.*;
public class GFG1 {
public static void main(String[] argv)
throws Exception
{
try {
String s = "Gfg 9 + 6 = 12.0";
// create a new scanner
// with the specified String Object
Scanner scanner = new Scanner(s);
while (scanner.hasNext()) {
// if the next is a BigDecimal
// print found and the BigDecimal
// since the value 60 is out of range
// it throws an exception
System.out.println("Next BigDecimal value :"
+ scanner.nextBigDecimal());
}
scanner.close();
}
catch (Exception e) {
System.out.println("Exception thrown: " + e);
}
}
}
Output:
Exception thrown: java.util.InputMismatchException
Program 3: To demonstrate NoSuchElementException
Java
// Java program to illustrate the
// nextBigDecimal() method of Scanner class in Java
// NoSuchElementException
import java.util.*;
public class GFG1 {
public static void main(String[] argv)
throws Exception
{
try {
String s = "Gfg";
// create a new scanner
// with the specified String Object
Scanner scanner = new Scanner(s);
// Trying to get the next BigDecimal value
// more times than the scanner
// Hence it will throw exception
for (int i = 0; i < 5; i++) {
// if the next is a BigDecimal,
// print found and the BigDecimal
if (scanner.hasNextBigDecimal()) {
System.out.println("Found BigDecimal value :"
+ scanner.nextBigDecimal());
}
// if no BigDecimal is found,
// print "Not Found:" and the token
else {
System.out.println("Not found BigDecimal value :"
+ scanner.next());
}
}
scanner.close();
}
catch (Exception e) {
System.out.println("Exception thrown: " + e);
}
}
}
Output:
Not found BigDecimal value :Gfg
Exception thrown: java.util.NoSuchElementException
Program 4: To demonstrate IllegalStateException
Java
// Java program to illustrate the
// nextBigDecimal() method of Scanner class in Java
// IllegalStateException
import java.util.*;
public class GFG1 {
public static void main(String[] argv)
throws Exception
{
try {
String s = "Gfg 9 + 6 = 12.0";
// create a new scanner
// with the specified String Object
Scanner scanner = new Scanner(s);
// close the scanner
scanner.close();
System.out.println("Scanner Closed");
System.out.println("Trying to get "
+ "next BigDecimal value");
while (scanner.hasNext()) {
// if the next is a BigDecimal,
// print found and the BigDecimal
if (scanner.hasNextBigDecimal()) {
System.out.println("Found BigDecimal value :"
+ scanner.nextBigDecimal());
}
// if no BigDecimal is found,
// print "Not Found:" and the token
else {
System.out.println("Not found BigDecimal value :"
+ scanner.next());
}
}
}
catch (Exception e) {
System.out.println("Exception thrown: " + e);
}
}
}
Output:
Scanner Closed
Trying to get next BigDecimal value
Exception thrown: java.lang.IllegalStateException: Scanner closed
Reference: https://docs.oracle.com/javase/7/docs/api/java/util/Scanner.html#nextBigDecimal()