Scanner hasNextByte() method in Java with Examples

Scanner ioException() method in Java with Examples

Last Updated : 16 Oct, 2018

The ioException() method of java.util.Scanner class returns the IOException last thrown by this Scanner's underlying Readable. This method returns null if no such exception exists. Syntax:

public IOException ioException()

Return Value: This function returns the last exception thrown by this scanner's readable. Below programs illustrate the above function: Program 1:

Java

// Java program to illustrate the
// ioException() method of Scanner class in Java
// without parameter

import java.util.*;

public class GFG1 {
    public static void main(String[] argv)
        throws Exception
    {

        String s = "gfg geeks!";

        // create a new scanner
// with the specified String Object
        Scanner scanner = new Scanner(s);

        // print the line
        System.out.println("" + scanner.nextLine());

        // check if there is an IO exception
        System.out.println("" + scanner.ioException());

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

Output:

gfg geeks!
null

Program 2:

Java

// Java program to illustrate the
// ioException() method of Scanner class in Java
// without parameter

import java.util.*;

public class GFG1 {
    public static void main(String[] argv)
        throws Exception
    {

        String s = "gopal dave!";

        // new scanner with the specified String Object
        Scanner scanner = new Scanner(s);

        // print the line
        System.out.println("" + scanner.nextLine());

        // checks if there is an IO exception
        System.out.println("" + scanner.ioException());

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

Output:

gopal dave!
null

Reference: https://docs.oracle.com/javase/7/docs/api/java/util/Scanner.html#ioException()

Scanner hasNextByte() method in Java with Examples

gopaldave

Improve

Article Tags :

Practice Tags :

Java

Similar Reads

Scanner hasNextInt() method in Java with Examples

The hasNextInt() method of java.util.Scanner class returns true if the next token in this scanner's input can be assumed as a Int value of the given radix. The scanner does not advance past any input. In case no radix is passed as a parameter, the function interprets the radix to be default radix an

Scanner findInLine() method in Java with Examples

findInLine(Pattern pattern)The findInLine(Pattern pattern) method of java.util.Scanner class tries to find the next occurrence of the specified pattern ignoring delimiters. If the pattern is found before the next line separator, the scanner advances past the input that matched and returns the string

Scanner hasNextLine() method in Java with Examples

The hasNextLine() method of java.util.Scanner class returns true if there is another line in the input of this scanner. This method may block while waiting for input. The scanner does not advance past any input. Syntax: public boolean hasNextLine() Parameters: The function does not accepts any param

Scanner hasNextLong() method in Java with Examples

The hasNextLong() method of java.util.Scanner class returns true if the next token in this scanner's input can be assumed as a Long value of the given radix. The scanner does not advance past any input. In case no radix is passed as a parameter, the function interprets the radix to be default radix

Scanner hasNextByte() method in Java with Examples

The hasNextByte() method of java.util.Scanner class returns true if the next token in this scanner's input can be assumed as a Byte value of the given radix. The scanner does not advance past any input. In case no radix is passed as a parameter, the function interprets the radix to be default radix

Scanner hasNextDouble() method in Java with Examples

The hasNextDouble() method of java.util.Scanner class returns true if the next token in this scanner's input can be interpreted as a Double using the nextDouble() method. The scanner does not advance past any input. Syntax: public Double hasNextDouble() Parameters: The function does not accepts any

Scanner hasNextFloat() method in Java with Examples

The hasNextFloat() method of java.util.Scanner class returns true if the next token in this scanner's input can be interpreted as a Float using the nextFloat() method. The scanner does not advance past any input. Syntax: public Float hasNextFloat() Parameters: The function does not accepts any param

Scanner hasNextShort() method in Java with Examples

The hasNextShort() method of java.util.Scanner class returns true if the next token in this scanner's input can be assumed as a short value of the given radix. The scanner does not advance past any input. In case no radix is passed as a parameter, the function interprets the radix to be default radi

Formatter ioException() method in Java with Examples

The ioException() method is a built-in method of the java.util.Formatter which returns the IOException last thrown by this formatter's Appendable. If the destination's append() method never throws IOException, then this method will always return null. Syntax: public IOException ioException() Paramet

Scanner hasNextBoolean() method in Java with Examples

The hasNextBoolean() method of java.util.Scanner class returns true if the next token in this scanner's input can be interpreted as a Boolean using the nextBoolean() method. The scanner does not advance past any input. Syntax: public boolean hasNextBoolean() Parameters: The function does not accepts