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Java.util.Scanner.nextLong() Method
Description
The java.util.Scanner.nextLong(int radix) method scans the next token of the input as a long. This method will throw InputMismatchException if the next token cannot be translated into a valid long value as described below. If the translation is successful, the scanner advances past the input that matched.
Declaration
Following is the declaration for java.util.Scanner.nextLong() method
public long nextLong(int radix)
Parameters
radix − the radix used to interpret the token as an int value
Return Value
This method returns the long scanned from the input
Exception
InputMismatchException − if the next token does not match the Integer regular expression, or is out of range
NoSuchElementException − if input is exhausted
IllegalStateException − if this scanner is closed
Example
The following example shows the usage of java.util.Scanner.nextLong() method.
package com.tutorialspoint; import java.util.*; public class ScannerDemo { public static void main(String[] args) { String s = "Hello World! 3 + 3.0 = 6.0 true "; Long l = 13964599874l; s = s + l; // create a new scanner with the specified String Object Scanner scanner = new Scanner(s); // find the next long token and print it // loop for the whole scanner while (scanner.hasNext()) { // if no long is found, print "Not Found:" and the token System.out.println("Not Found :" + scanner.next()); // if the next is a long, print found and the long with radix 20 if (scanner.hasNextLong()) { System.out.println("Found :" + scanner.nextLong(20)); } } // close the scanner scanner.close(); } }
Let us compile and run the above program, this will produce the following result −
Not Found :Hello Not Found :World! Found :3 Not Found :+ Not Found :3.0 Not Found := Not Found :6.0 Not Found :true Found :12014353515344