CODEWITHSUNDEEP
java
kurt ortan
kurt ortan

Reputation: 21

How do I compare two lists in Java and print the result based on each combination?

I want to compute ticket price between each stations based on the price matrix:

        a  b c 

  a     0  2 3
  b     4  0 1
  c     7  2 0

Example: from a to b print 2 or from c to a print 7 based on values in the above price matrix.

Here it is, I want to print the railway ticket fare based on the two station lists: "from:" list and "to:" list. I want to print fare after comparing. There is a fixed fare for each combination. For example station a to station b, the fare is 10. For any one station to other station there is a fixed fare.

Upvotes: 1

Views: 250

Answers (2)

Emil
Emil

Reputation: 13789

You could also use guava's Table.

Exmaple:

Table<Integer, String, String> table = HashBasedTable.create();
table.put(1, "a", "1a");
table.put(1, "b", "1b");
table.put(2, "a", "2a");
table.put(2, "b", "2b");

Upvotes: 0

Zoltan Balazs
Zoltan Balazs

Reputation: 837

I would create a class, which is responsible for storing the fares.

public class FareStorage {
    Map<TownCombination, Double> fares;

    //...

    public double getFare(String townA, String townB) {
        return fares.get(new TownCombination(townA, townB));
    }

    public void addFare(String townA, String townB, double fare) {
        fares.put(new TownCombination(townA, townB));
    }

    class TownCombination {
        String town1;
        String town2;

        //If a fare from A to B is equals the fare from B to A, 
        //then the A-B and the B-A combinations should be equal. 
        //Override hashCode and equals the way you want.  
    }
}

It is not complete, but I hope you get the idea. This is how you can use it:

        FareStorage storage = new FareStorage();
        storage.addFare("A", "B", 10.2);

        //....
        double fare = storage.get("A", "B");

Upvotes: 1

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