String result;
Map<String,String> myMap = new Map<String,String>();
myMap = (Map<String,String>) ApexPages.currentPage().getParameters();
for (String key : myMap.keySet()) {
  String val = myMap.get(key);
  result = result+key+'('+val+');n';
}

(...) j_id[X1]:j_id[X2]:j_id[X3]:j_id[X4]:j_idX5:keyExample(valExample); (...)

(...) keyExample(valExample); (...)