This proposal is structured into two different parts:

*) Catching multiple exception types: A single catch clause can now catch
   more than one exception types, enabling a series of otherwise identical
   catch clauses to be written as a single catch clause.

*) Improved checking for rethrown exceptions:  Previously, rethrowing an
   exception was treated as throwing the type of the catch parameter.  Now,
   when a catch parameter is declared final, rethrowing the exception is known
   statically to throw only those checked exception types that were thrown in
   the try block, are a subtype of the catch parameter type, and not caught in
   preceding catch clauses.

EXAMPLE (multicatch):

before:

try {
    doWork(file);
} catch (IOException ex) {
    logger.log(ex);
} catch (SQLException ex) {
    logger.log(ex);
}

after:

try {
    doWork(file);
} catch (final IOException|SQLException ex) {
    logger.log(ex);
}

EXAMPLE (rethrow)

before

void m() throws IOException, SQLException {
try {
   doWork(file);
} catch (IOException) {
    logger.log(ex);
} catch (SQLException ex) {
    logger.log(ex);
    throw ex; //rethrows IOException,SQLException
}
}

after:

void m() throws SQLException {
try {
   doWork(file);
} catch (IOException) {
    logger.log(ex);
} catch (final SQLException ex) {
    logger.log(ex);
    throw ex; //rethrows SQLException
}
}