How can I do this, calculateDistance method: Receives a route (which is an array

Question

How can I do this,

calculateDistance method: Receives a route (which is an array), for each route segment (pair of cities), has to
display cities names and the distance between those two cities and the total-distance until that segment. If doesn%u2019t
exist a distance for any pair, the program will display the segment but the total-distance is not affected but must
continue calculating.

Like this

Output

-------------------------------------------------------------------

Distance for route :

From : kalamazoo To grandRapids : 51 Accum: 51
From : grandRapids To lansing : 66 Accum: 117
From : lansing To kalamazoo : -1 Accum: 117 <------no distance yet

This it the code I currently have but it only shows accumalitve distance and doest not say, no distance yet, for the incorrect ones

public void calculateDistance(String[] route){

    System.out.println("Distance for route :");
    int Accum = 0;
    for(int i=0; i<route.length-1; i++){
       
        if(distances[findIndexCity(route[i])][findIndexCity(route[i+1])]>0)
            Accum = Accum + distances[findIndexCity(route[i])][findIndexCity(route[i+1])];
   
        System.out.println("From : " + route[i] + " To " + route[i+1] + " : " + " Accum: " + Accum);
}
}

Mine looks like this

------------------------------

Distance for route :
From : kalamazoo To grandRapids : Accum: 51
From : grandRapids To lansing : Accum: 117
From : lansing To kalamazoo : Accum: 117

Explanation / Answer

public void calculateDistance(String[] route)
{
    System.out.println("Distance for route :");
    int Accum = 0;
    for(int i=0; i<route.length-1; i++)
    {
    if(distances[findIndexCity(route[i])][findIndexCity(route[i+1])]>0)
        {
            Accum = Accum + distances[findIndexCity(route[i])][findIndexCity(route[i+1])];
            System.out.println("From : " + route[i] + " To " + route[i+1] + " : " + d + " Accum: " + Accum);
        }
        else
        {    
            System.out.println("From : " + route[i] + " To " + route[i+1] + " : " + d + " Accum: " + Accum + " <------no distance yet");
        }
}
}

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