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Question

我编辑此代码，因为我不能永久删除它。我编辑了这段代码，因为我不能永久删除它。我编辑了这段代码，因为我不能永久删除它。我编辑的代码，因为我不能永久删除 。我编辑的代码，因为我不能删除它永久

请不要重新编辑

Answer 1

你应该从创建文件的加载分离成图的图。

事情是这样的：

public interface GraphLoader { 
    /** 
    * Fill a graph with no property from a single file. 
    * 
    * @param graph the graph to fill 
    * @param path path to graph file 
    * @return a graph with no property 
    */ 
    public static void loadSingleFile(Graph graph, Path path) { 
     try (BufferedReader bufferedReader = new BufferedReader(new FileReader(path.toFile()))) { 
      String line; 
      while ((line = bufferedReader.readLine()) != null) { 
       String[] vertices = line.split(" "); 
       if (vertices.length < 2) { 
        continue; 
       } 
       graph.addEdge(Integer.parseInt(vertices[0]), Integer.parseInt(vertices[1])); 
      } 

     } catch (FileNotFoundException e) { 
      e.printStackTrace(); 
     } catch (IOException e) { 
      e.printStackTrace(); 
     } 
    } 

    /** 
    * load a graph with no property from a single file. 
    * 
    * @param path path to graph file 
    * @return a graph with no property 
    */ 
    public static Graph loadSingleFile(Path path) { 
     Graph graph = new Graph(); 
     loadSingleFile(graph, path); 
     return graph; 
    } 

    /** 
    * load a graph with no property from multiple files in parallel. 
    * 
    * @param paths paths to graph files 
    * @return a graph with no property 
    */ 
    static Graph loadMultipleFiles(Path[] paths) { 
     Graph graph = new Graph(); 
     for (Path path : paths) { 
      loadSingleFile(graph, path); 
     } 
     return graph; 
    } 

} 

Answer 2

1. 使用 “尝试用资源”。在等级秩序 Advantages of exceptions by Oracle

2. 为什么使用功能，这 Try with resources documentation by Oracle

3. 鸿沟 “catch” 块？这是一个建筑理念吗？