for loop : Cannot be resolved to a variable

Question

I was wondering why I had this error when I tried to do this :

Map<Integer, List<String>> map = (Map<Integer, List<String>>) parameters;

for(Integer i : map.keySet()) {
    tableFiles.setWidget(row, 0, addPanelFile(String.valueOf(i)));
    row++;
    for(map.get(i)) {

    }
}

Why can't i be resolved to a variable ?

Answer 1

The for-loop is malformed.

Change

for(((Map<Integer, List<String>>) parameters).get(i)) {

}

into

for(SomeType someVar : ((Map<Integer, List<String>>) parameters).get(i)) {

}

and you should get a better error-message.