1
我是一个prolog-noob,并且在java中有一个prolog-list的问题。Java中的Prolog列表与JPL
的Prolog:
event( 'Number1',
54.320021,
13.043840,
[sport,hotel,schwimmen,sauna]).
event( 'Number2',
54.320678,
13.046984,
[einkaufen]).
findAllCategories(Categories):-
findall(X, event(_,_,_,X), L),
appendCategories(C1,L),
Categories = C1.
appendCategories(C1,[R|[]]):-
C1 = R.
appendCategories(C,[R|L]):-
appendCategories(C1,L),
append(C1,R,X),
C = X.
append([],L,L).
append([H|T],L2,[H|L3]):-
append(T,L2,L3).
解在prologconsole: [einkaufen,体育,酒店,schwimmen,桑拿]
爪哇:
import java.util.ArrayList;
import java.util.Map;
import org.jpl7.*;
public ArrayList<String> getCategoriesByProlog(){
ArrayList<String> categories = new ArrayList<String>();
Variable X = new Variable("X");
Query q4 =
new Query(
"findAllCategories",
new Term[] {X}
);
Map<String, Term>[] solutions = q4.allSolutions();
for (int i=0 ; i<solutions.length ; i++) {
System.out.println("X = " + solutions[i].get("X"));
categories.add(solutions[i].get("X").toString());
}
return categories;
输出在Java中: X =' [|]'(运动,'[|]'(酒店,'[|]'(schwimmen,'[|]'(sauna,'[''')))))
我如何才能读取序言作为Java的ArrayList?