Java.util.Scanner.hasNext() Method


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Description

The java.util.Scanner.hasNext() method Returns true if this scanner has another token in its input. This method may block while waiting for input to scan. The scanner does not advance past any input.

Declaration

Following is the declaration for java.util.Scanner.hasNext() method

public boolean hasNext()

Parameters

  • NA

Return Value

This method returns true if and only if this scanner has another token

Exception

  • IllegalStateException -- if this scanner is closed

Example

The following example shows the usage of java.util.Scanner.hasNext() method.

package com.tutorialspoint;

import java.util.*;
import java.util.regex.Pattern;

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);

   // check if the scanner has a token
   System.out.println("" + scanner.hasNext());

   // print the rest of the string
   System.out.println("" + scanner.nextLine());

   // check if the scanner has a token after printing the line
   System.out.println("" + scanner.hasNext());

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

Let us compile and run the above program, this will produce the following result:

true
Hello World! 3+3.0=6
false

java_util_scanner.htm

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