Java Keyword: catch

catch is used to catch exceptions thrown in a preceeding try block:

try {
    // code that may throw exceptions
} catch (SomeException ex) {
    // handle exception
}

There can be multiple catch blocks after each try block:

try {
    // code that may throw exceptions
} catch (IOException ex) {
    // handle IOException
} catch (InterruptedException ex) {
    // handle InterruptedException
} catch (Exception ex) {
    // handle all other types of exceptions
}

A single catch block can also handle multiple types of exceptions. This is called multicatch and was introduced in Java 7.

try {
    // code that may throw exceptions
} catch (IOException | InterruptedException ex) {
    // handle IOExceptions and InterruptedExceptions
} catch (Exception ex) {
    // handle all other types of exceptions
}

See Java Exceptions: Throw, Try and Catch for details on semantics.