Home - News ( United States | United Kingdom | Italy | Germany ) - Football scores

Showing content from https://www.tutorialspoint.com/java/util/scanner_hasnextint.htm below:

Java Scanner hasNextInt() Method

The Java Scanner hasNextInt() method returns true if the next token in this scanner's input can be interpreted as an int value in the default radix using the nextInt() method. The scanner does not advance past any input.

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

public boolean hasNextInt()

NA

This method returns true if and only if this scanner's next token is a valid int value

IllegalStateException − if this scanner is closed

The java.util.Scanner.hasNextInt(int radix) method returns true if the next token in this scanner's input can be interpreted as an int value in the specified radix using the nextInt() method. The scanner does not advance past any input.

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

public boolean hasNextInt(int radix)

radix − the radix used to interpret the token as an int value

This method returns true if and only if this scanner's next token is a valid int value

IllegalStateException − if this scanner is closed

The following example shows the usage of Java Scanner hasNextInt() method to check if next token is a Int using a default radix. We've created a scanner object using a given string. Then we checked each token to be Int and printed. 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 an Int
         System.out.println("" + scanner.hasNextInt());

         // print what is scanned
         System.out.println("" + scanner.next());
      }

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

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

false
Hello
false
World!
true
3
false
+
false
3.0
false
=
true
6

The following example shows the usage of Java Scanner hasNextInt() method to check if next token is a Int using a radix of 4. We've created a scanner object using a given string. Then we checked each token to be Int and printed. 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 an Int
         System.out.println("" + scanner.hasNextInt(4));

         // print what is scanned
         System.out.println("" + scanner.next());
      }

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

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

false
Hello
false
World!
true
3
false
+
false
3.0
false
=
false
6

The following example shows the usage of Java Scanner hasNextInt() method to check if next token is a Int. We've created a scanner object using System.in class. Then we checked each token to be Int and printed. 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);
         
      // check if the scanner's next token is a Int
      if(scanner.hasNextInt()){
         // print what is scanned
         System.out.println(scanner.next());		 
      } else {
         scanner.next();
      }

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

Let us compile and run the above program, this will produce the following result − (where we've entered 3.0.)

3
3

java_util_scanner.htm

RetroSearch is an open source project built by @garambo | Open a GitHub Issue

Search and Browse the WWW like it's 1997 | Search results from DuckDuckGo

HTML: 3.2 | Encoding: UTF-8 | Version: 0.7.4