Scanner ioException() method in Java with Examples
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 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 Beginner!" ; // 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 Beginner! null
Program 2:
// 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()