JD.UNMOD
This error is reported when an attempt to modify an unmodifiable collection is detected. Such attempts cause runtime exceptions.
Example 1
Copy
public static void main(String[] args) {
argsCol = createCollection(args);
for (final Iterator<String> iterator = argsCol.iterator(); iterator.hasNext();) {
final String arg = iterator.next();
if ("version".equals(arg)) {
printVersion();
iterator.remove();
}
}
run();
}
public static Collection<String> createCollection(final String[] array) {
return Arrays.asList(array);
}JD.UNMOD is reported for the snippet on line 18: attempt to modify the unmodifiable collection 'argsCol' via its iterator.
Example 2
Copy
public static void main(String[] args) {
argsCol = createCollection(args);
for (final Iterator<String> iterator = argsCol.iterator(); iterator.hasNext();) {
final String arg = iterator.next();
if ("version".equals(arg)) {
printVersion();
iterator.remove();
}
}
run();
}
public static Collection<String> createCollection(final String[] array) {
final List<String> list = new ArrayList<String>();
for (final String str : array) {
list.add(str);
}
return list;
}The problem from the previous snippet is fixed: the code is still modifying 'argsCol' via its iterator, however the 'argsCol' is not unmodifiable here; see the modified 'createCollection' method. JD.UNMOD is not reported here.
Extension
This checker can be extended through the Klocwork knowledge base. See Tuning Java analysis for more information.