Adding edge weights to a 2-d array

Asked Dec 12 '19 at 16:18

Active Dec 12 '19 at 16:18

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Im trying to add edge weights to a 2-d array. im looped through the graph edges, then looped through the nodes and comparing the 2 to find the index of the head node and the tail node, then trying to add that to the array. But its telling me my variables arent initialized. Any ideas?

        int head;
        int tail;
        for (int i = 0; i < g.edgeList.size(); i++) {
            for (int j = 0; j < g.nodeList.size(); j++) {
                if (g.nodeList.get(j) == g.edgeList.get(i).head) {
                    head = g.nodeList.indexOf(j);
                }
                if (g.nodeList.get(j) == g.edgeList.get(i).tail) {
                    tail = g.nodeList.indexOf(j);
                }
                W[head][tail] = Integer.parseInt(g.edgeList.get(i).label);
            }
        }

asked Dec 12 '19 at 16:18

ryan williams

1

Change your int declarations to `int head = 0; int tail = 0;` – sleepToken Dec 12 '19 at 16:24
See https://stackoverflow.com/questions/11165485/java-why-am-i-required-to-initialize-a-primitive-local-variable – PM 77-1 Dec 12 '19 at 18:31

Adding edge weights to a 2-d array

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