Java Utility Library

Java Scanner - IOException() Method

The java.util.Scanner.IOException() method returns the IOException last thrown by the Scanner's underlying Readable. The method returns null if no such exception exists.

Syntax

public IOException ioException()

Parameters

No parameter is required.

Return Value

Returns the last exception thrown by this scanner's readable.

Exception

NA.

Example:

In the example below, the java.util.Scanner.IOException() method is used to check if there is any IOException thrown by the Scanner's underlying Readable.

import java.util.*;

public class MyClass {
  public static void main(String[] args) {

    //String to scan
    String MyString = "Hello World 10 + 20 = 30.0";

    //creating a Scanner
    Scanner MyScan = new Scanner(MyString);

    //print the nextLine token
    System.out.println(MyScan.nextLine());

    //check if there is any IOException
    System.out.println(MyScan.ioException());

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

The output of the above code will be:

Hello World 10 + 20 = 30.0
null

❮ Java.util - Scanner