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Java Scanner nextBigDecimal() Method
Description
The java Scanner nextBigDecimal() method 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.
Declaration
Following is the declaration for java.util.Scanner.nextBigDecimal() method
public BigDecimal nextBigDecimal()
Parameters
NA
Return Value
This method returns the BigDecimal scanned from the input
Exception
InputMismatchException − if the next token does not match the Decimal regular expression, or is out of range
NoSuchElementException − if the input is exhausted
IllegalStateException − if this scanner is closed
Getting Next Token as BigDecimal of a Scanner on a String Example
The following example shows the usage of Java Scanner nextBigDecimal() method to scan the next token as BigDecimal. We've created a scanner object using a given string. Then we checked each token to be BigDecimal and printed otherwise Not Found is printed along with scanned token. In the end scanner is closed using close() method.
package com.tutorialspoint; import java.util.Scanner; public class ScannerDemo { public static void main(String[] args) { String s = "Hello World! 3 + 3.0 = 6"; // create a new scanner with the specified String Object Scanner scanner = new Scanner(s); while (scanner.hasNext()) { // check if the scanner's next token is a BigDecimal if(scanner.hasNextBigDecimal()){ // print what is scanned System.out.println("Found: " + scanner.nextBigDecimal()); } else { System.out.println("Not Found: " + scanner.next()); } } // close the scanner scanner.close(); } }
Output
Let us compile and run the above program, this will produce the following result −
Not Found: Hello Not Found: World! Found: 3 Not Found: + Found: 3.0 Not Found: = Found: 6
Getting Next Token as BigDecimal of a Scanner on User Input Example
The following example shows the usage of Java Scanner nextBigDecimal() method to scan the next token as BigDecimal. We've created a scanner object using System.in class. Then we checked each token to be BigDecimal and printed otherwise Not Found is printed along with scanned token. In the end scanner is closed using close() method.
package com.tutorialspoint; import java.util.Scanner; public class ScannerDemo { public static void main(String[] args) { // create a new scanner with System Input Scanner scanner = new Scanner(System.in); while (scanner.hasNext()) { // check if the scanner's next token is a BigDecimal if(scanner.hasNextBigDecimal()){ // print what is scanned System.out.println("Found: " + scanner.nextBigDecimal()); } else { System.out.println("Not Found: " + scanner.next()); } } // close the scanner scanner.close(); } }
Output
Let us compile and run the above program, this will produce the following result − (where we've entered 3.0.)
3.0 Found: 3.0
Getting Next Token as BigDecimal of a Scanner on a Properties File Example
The following example shows the usage of Java Scanner nextBigDecimal() method to scan the next token as BigDecimal. We've created a scanner object using a file properties.txt. Then we checked each token to be BigDecimal and printed otherwise Not Found is printed along with scanned token. In the end scanner is closed using close() method.
package com.tutorialspoint; import java.io.File; import java.io.FileNotFoundException; import java.util.Scanner; public class ScannerDemo { public static void main(String[] args) throws FileNotFoundException { // create a new scanner with a file as input Scanner scanner = new Scanner(new File("properties.txt")); while (scanner.hasNext()) { // check if the scanner's next token is a BigDecimal if(scanner.hasNextBigDecimal()){ // print what is scanned System.out.println("Found: " + scanner.nextBigDecimal()); } else { System.out.println("Not Found: " + scanner.next()); } } // close the scanner scanner.close(); } }
Assuming we have a file properties.txt available in your CLASSPATH, with the following content. This file will be used as an input for our example program −
Hello World! 3 + 3.0 = 6
Output
Let us compile and run the above program, this will produce the following result −
3 3.0 6
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