我正在尝试将普通的 PDDL 案例（作为物流示例）建模为不同的编程语言（java）。我这样做是为了了解使用 PDDL 的优点或缺点。
这是 PDDL 原始示例
https://github.com/pellierd/pddl4j/wiki/Logistics:-a-simple-running-example
我的结果是一个简单的顺序程序，如代码所示。我的目标是使计算自动化以获得真正的组合计算，而不是顺序计算。
public class logistics {
private static boolean airplaneInUse = false;
private static boolean truckInUse = false;
private static String airport;
private static String place;
private static String city;
private static String pack1;
private static String pack2;
static int state = 0;
public static void main(String args[]) {
if(state == 0) {
start();
System.out.println("The city in the initial state is " + city + "\n");
System.out.println("The airport in the initial state is " + airport + "\n");
}
if(city == "London") {
load_plane();
System.out.println("pk1 and pk2 are on the plane" +"\n");
pack1 = "On Board";
pack2 = "On Board";
}
if(pack1 == "On Board" && pack2 == "On Board") {
fly();
System.out.println("The city after the flight is " + city + "\n");
System.out.println("The airport after the flight is " + airport + "\n");
}
if (city == "Paris") {
unload_plane();
System.out.println("pk1 and pk2 are unloaded from the plane " + "\n");
pack1 = "Unloaded";
pack2 = "Unloaded";
}
if (pack1 == "Unloaded" && pack2 == "Unloaded") {
load_truck();
System.out.println(pack1 + "\n");
System.out.println(pack2 + "\n");
}
if(pack1 == "pk1 On the truck" || pack2 == "pk2 On the truck") {
drive_truck();
System.out.println("Driving to the first place " + "\n");
System.out.println("Driving to the second place " + "\n");
}
if (truckInUse == true) {
unload_truck1();
System.out.println("pk1 delivered in the " + place + "\n");
unload_truck2();
System.out.println("pk2 delivered in the " + place + "\n");
}
}
public static void start() {
city = "London";
airport = "lhr";
return;
}
public static void load_plane() {
city = "London";
pack1 = " pk1 On board";
pack2 = " pk2 On board";
return;
}
public static void fly() {
city = "Paris";
airport = "cdg";
airplaneInUse = true;
return;
}
public static void unload_plane() {
pack1 = "Arrived in Paris";
pack2 = "Arrived in Paris";
airplaneInUse = false;
return;
}
public static void load_truck() {
pack1 = "pk1 On the truck";
pack2 = "pk2 On the truck";
return;
}
public static void drive_truck() {
truckInUse = true;
return;
}
public static void unload_truck1() {
truckInUse = false;
pack1 = "Arrived in South";
place = "South";
return;
}
public static void unload_truck2() {
truckInUse = false;
pack1 = "Arrived in North";
place = "North";
return;
}
}
我怎样才能达到我的目标？如何获得组合计算来解决问题？