import weka.core.Instances;
 import weka.filters.Filter;
 import weka.filters.unsupervised.attribute.Remove;
 ...
 String[] options = new String[2];
 options[0] = "-R";                                    // "range"
 options[1] = "1";                                     // first attribute
 Remove remove = new Remove();                         // new instance of filter
 remove.setOptions(options);                           // set options
 remove.setInputFormat(data);                          // inform filter about dataset **AFTER** setting options
 Instances newData = Filter.useFilter(data, remove);   // apply filter