我有下面的代码，通过键盘输入，给我开始和到达。。开始是根据“da”命题来决定的，而到达是根据介词“a”来决定的，所以我现在要做的是：我想得到开始和到达，即使我改变了命题的顺序。。你知道我该怎么做。。这是我得到的结果：

I want to go from ostuni to trapani
    Partenza :ostuni 
    Arrivo :trapani
    but if I wrote like this:
    I want to go to ostuni by trapani
    I would like to print the same start and finish correctly ..that is
    Patenza :trapani
    Arrivo :ostuni
    Is this processing possible?
thanks a lot for the attention! Good day

包eubot.controller；

import eubot.intent.Intent;
public class EubotEngine {
    public Intent getIntent(String stringInput) {
     String str1 = "";
     String str2 = "";
     Intent dictionary = null;
     for (String str3 : Intent.keyWord) {
     if (stringInput.contains(str3)) {
     //System.out.println("La stringa contiene : " + str3);
     int indice1 = stringInput.indexOf(str3) + str3.length();
     String splittable =
     stringInput.substring(indice1,stringInput.length()).trim();
     String splittable2[] = splittable.split(" ");
     int index = 0;
     for (String str : splittable2) {
     str = splittable2[index +1];
     str1 = str;
     System.out.println("Partenza :" + str1);
     break;
     }
     String splittable3[] = splittable.split(" ");
     for(String str : splittable3) {
     str = splittable3[index + 3];
     str2 = str;
     System.out.println("Arrivo :" + str2);
     break;
     }
     index++;
     dictionary = new Intent();
     dictionary.setTesto(stringInput);
     }
     }
     return dictionary;
     }
}
package eustema.eubot.intent;
public class Intent {
    public String testo;
    public String getTesto() {
        return testo;
    }
    public void setTesto(String testo) {
        this.testo = testo;
    }
    public static String[] keyWord = { "devo andare", "voglio andare", "vorrei andare", "devo recarmi"};
    public static String[] parameter = { "bari", "roma", "milano","pisa","firenze","napoli","como","torino" };
}
package eustema.eubot.main;
import java.util.Scanner;
import eustema.eubot.controller.*;
import eustema.eubot.intent.*;
public class Test {
    public static void main(String[] args) {
        System.out.println("<<-|-|-|-|-|-|-|-|-|<<<BENVENUTO IN EuBoT>>>|-|-|-|-|-|-|-|-|->>");
        EubotEngine controller = new EubotEngine();
        Scanner input = new Scanner(System.in);
        String string;
        while (true) {
            string = input.nextLine();
            Intent intent = controller.getIntent(string);
        }
    }
}