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Java basics

nextLong()


The java.util.Scanner.nextLong() method scans the next token of the input as a long.An invocation of this method of the form nextLong() behaves in exactly the same way as the invocation nextLong(radix), where radix is the default radix of this scanner.

Syntax:
no such syntax exists


Example:

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 
         if (scanner.hasNextLong()) {
            System.out.println("Found :" + scanner.nextLong());
         }

      }

      // close the scanner
      scanner.close();
   }
}

Output:

Not Found :Hello
Not Found :World!
Found :3
Not Found :+
Not Found :3.0
Not Found :=
Not Found :6.0
Not Found :true
Found :13964599874


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