Scanner ioException() method in Java with Examples
Last Updated :
16 Oct, 2018
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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:
Java
Java
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 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:
Program 2:
gfg geeks! null
// 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:
Reference: https://docs.oracle.com/javase/7/docs/api/java/util/Scanner.html#ioException()
gopal dave! null
