devxlogo

Standard Input Exception

Standard Input Exception

Question:
Why do I have to catch an exception when I use System.in.read()?

Answer:
System.in is an InputStream, and like any InputStream, an I/O errormay occur when you read from it. For example, the Java program mayhave been run as a background process with no standard input, causingan error during a read attempt.

InputStream.read() throws anIOException if an error occurs while reading from the stream. Thisexception is not derived from RuntimeException and must be caught or elseyour program will not compile.

devx-admin

Share the Post: