将字符串放在netbeans中的drawline上

Question

我正在制作图形GUI应用程序，其中我有算法，我可以运行模拟来显示最短路径。现在，图表与无向未加权边缘一起工作正常。现在我想要加权边缘。我想要的是能够将重量放在线上。

无论何时放置边，我都有一个将边放入列表的函数。边具有id，source，destination和weight。我有一个返回重量的功能。我想使用getWeight返回重量，然后将其放在边缘。 这是绘制线的代码

private void pnlGraphMouseDragged(java.awt.event.MouseEvent evt) {
    if (_selectedNode >= 0) {
        if (SwingUtilities.isLeftMouseButton(evt)) {
            Image buff = createImage(pnlGraph.getWidth() - 1, pnlGraph.getHeight() - 1);
            Graphics buffG = buff.getGraphics();
            buffG.drawImage(bufferImage, 0, 0, this);
            Point source = locations.get(_selectedNode);
            //buffG.drawLine(source.x, source.y,
                    //evt.getX(), evt.getY());
            drawArrow(buffG, source.x, source.y, evt.getX(), evt.getY());
            pnlGraph.getGraphics().drawImage(buff, 1, 1, this);

        } else if (SwingUtilities.isMiddleMouseButton(evt)) {
            locations.get(_selectedNode).x = evt.getX();
            locations.get(_selectedNode).y = evt.getY();
            graph();
            changesMade = true;
        }
    }
}

放置边缘后，我创建一个边缘对象并将其放在列表中

private void pnlGraphMouseReleased(java.awt.event.MouseEvent evt) {
    if (_selectedNode >= 0) {
        int destination = nodeSelected(evt.getX(), evt.getY());
        if (destination >= 0 && destination != _selectedNode) {
            addEdge(Edgeid, _selectedNode, destination, (int)(Math.random() * 100));
            _selectedNode = -1;
            changesMade = true;
            Edgeid++;
        }
    }
    graph();
}

private void addEdge(int edgeId, int sourceid, int destid, final int weight) {
    Edge newEdge = new Edge(edgeId, vertices.get(sourceid), vertices.get(destid), 0, weight);
    edges.add(newEdge);
    printlnConsole(newEdge.getId()+" "+newEdge.getSource().getName()+" "+newEdge.getDest().getName()+" "+newEdge.getWeight());
    vertices.get(sourceid).vList().add(vertices.get(destid));
    vertices.get(destid).vList().add(vertices.get(sourceid));
}