- Java.util Package Classes
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- Java.util - Scanner
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Java Scanner hasNextByte() Method
Description
The Java Scanner hasNextByte() method returns true if the next token in this scanner's input can be interpreted as a byte value in the default radix using the nextByte() method. The scanner does not advance past any input.
Declaration
Following is the declaration for java.util.Scanner.hasNextByte() method
public boolean hasNextByte()
Parameters
NA
Return Value
This method returns true if and only if this scanner's next token is a valid byte value
Exception
IllegalStateException − if this scanner is closed
Checking Next Token as Byte Using Scanner On a String Example
The following example shows the usage of Java Scanner hasNextByte() method to check if next token is a Byte using a default radix. We've created a scanner object using a given string. Then we checked each token to be Byte 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 a Byte System.out.println("" + scanner.hasNextByte()); // print what is scanned System.out.println("" + scanner.next()); } // close the scanner scanner.close(); } }
Output
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
Checking Next Token as Byte of Radix 5 Using Scanner On a String Example
The following example shows the usage of Java Scanner hasNextByte() method to check if next token is a Byte using a radix of 5. We've created a scanner object using a given string. Then we checked each token to be Byte 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 a Byte System.out.println("" + scanner.hasNextByte(4)); // print what is scanned System.out.println("" + scanner.next()); } // close the scanner scanner.close(); } }
Output
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
Checking Next Token as Byte Using Scanner On User Input Example
The following example shows the usage of Java Scanner hasNextByte() method to check if next token is a Byte. We've created a scanner object using System.in class. Then we checked each token to be Byte 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 Byte if(scanner.hasNextByte()){ // print what is scanned System.out.println(scanner.next()); } else { 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.)
2 2
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