"IllegalArgumentException but did not!");
} catch (IllegalArgumentException e) {}
// Test named arguments.
MessageFormat mf = new MessageFormat("Number of files in folder {folder}: {numfiles}");
if (!mf.usesNamedArguments()) {
errln("message format 1 should have used named arguments");
}
mf = new MessageFormat("Wavelength: {\u028EValue\uFF14}");
if (!mf.usesNamedArguments()) {
errln("message format 2 should have used named arguments");