Question

Give a two-dimensional array T with base type String and some string str (which can be treated like an array of type String) I want to check if T contains certain parts str as its entries. I tried this:

int indeksck = str.indexOf("C");

while(k<T.length){
    if(T[k][2] == str.substring(indeksck+1)){
        if(T[k][1] == str.substring(6, indeksck)){
            int ile_o = Integer.parseInt(T[k][0]);
            T[k][0]= Integer.toString(ile_o+1);
            T[k][3] = T[k][3]+"X"+str.substring(1,6);
            k = T.length+1;
        } else {
            k++;
        }

    } else {
        k++;

        if(k==T.length){
            k = 0;
            while(k<T.length){
                if(T[k][0]==null){
                    T[k][0] = Integer.toString(1);
                    T[k][1] = str.substring(6,indeksck);
                    T[k][2] = str.substring(indeksck+1);
                    T[k][3] = str.substring(1,6);
                    k = T.length+1;
                } else {
                    k++;
                }
            }
        }
    }
}

The problem is that the first part of my code is being ignored (even when condition should be satisfied). I would appreciate and suggestions on solving this problem.

Answer 1

You cannot use == to do string compare. Try:

if(T[k][2].equals(str.substring(indeksck+1))) {