我正在用源和目标打印每个边,但是当我在 mxgraph java 中使用 getEdgeCount() 时它们会重复

问题描述

我正在使用以下函数向我显示图中的每条边及其源和目标。但是,我注意到一些边缘突然出现。

public void showEdges()
    {
        Object[] list = graph.getChildVertices(graph.getDefaultParent());
        for(int i=0; i< list.length; i++)
        {
            mxICell vertex = (mxICell) list[i];
            for (int j =0; j<vertex.getEdgeCount(); j++)
            {
                mxICell edge = vertex.getEdgeAt(j);
                String destination =(String) (edge.getTerminal(false)).getValue();
                System.out.println("vertex-" + i + " is connected to " +
                        destination + " with weight " + (String)edge.getValue());
            }
        }
         
    }

我画的是这个链接https://pin.it/7b0Qh7v

输出

vertex-0 is connected to 0 with weight 2
vertex-0 is connected to 2 with weight 15
vertex-1 is connected to 2 with weight 17
vertex-2 is connected to 2 with weight 17
vertex-2 is connected to 2 with weight 15

我的预期是:

vertex-0 is connected to 0 with weight 2
vertex-0 is connected to 2 with weight 15
vertex-1 is connected to 2 with weight 17

有没有办法解决这个问题?

解决方法

现在我知道我的代码有问题了。 方法 getEdgesAt(int index) 返回所有边缘,无论它们是传入的还是传出的,我想要让我的方法工作的只是传出边缘。 我用这个替换了方法:

    public void getEdges()
    {
        Object[] list = graph.getChildVertices(graph.getDefaultParent());
        for(int i=0; i< list.length; i++)
        {
            mxICell vertex = (mxICell) list[i];
            Object[] edges = graph.getEdges(vertex,graph.getDefaultParent(),false,true,true);
            for (int j =0; j<edges.length; j++)
            {
                String destination =(String) (((mxICell)edges[j]).getTerminal(false)).getValue();
                System.out.println("vertex-" + i + " is connected to " +
                        destination + " with weight " + (String)edge.getValue());
            }
            
        }
    }