爲什麼我的程序不給我輸出？

Question

What am I missing, My program won't give me any outputs. I am also getting an error "constructor class cannot applied given types" like that. 

我們的課程是關於深度優先搜索和二進制圖表，但我犯了一個錯誤，不參加課程，所以現在我很後悔。請有人幫助我。

我不能添加一些細節因爲我真的不知道這個程序是如何工作的，所以我真的很抱歉。

public class MainDriver{ 

    public static void main(String[] args) { 

     Graph mygraph = new Graph(22); 
     mygraph.addEdge(1,2); 
     mygraph.addEdge(2,4); 
     mygraph.addEdge(2,5); 
     mygraph.addEdge(4,8); 
     mygraph.addEdge(4,9); 
     mygraph.addEdge(8,16); 
     mygraph.addEdge(8,17); 
     mygraph.addEdge(9,18); 
     mygraph.addEdge(9,19); 
     mygraph.addEdge(5,10); 
     mygraph.addEdge(5,11); 
     mygraph.addEdge(10,20); 
     mygraph.addEdge(10,21); 
     mygraph.addEdge(1,3); 
     mygraph.addEdge(3,6); 
     mygraph.addEdge(3,7); 
     mygraph.addEdge(6,12); 
     mygraph.addEdge(6,13); 
     mygraph.addEdge(7,14); 
     mygraph.addEdge(7,15); 


    } 

    DepthFirstSearch dfs = new DepthFirstSearch(G,v); 



} 


---------- 

Here's my subclass 

public class DepthFirstSearch{ 

private boolean[] marked; 
private int count; 

public DepthFirstSearch(Graph G, int s) { 
    marked = new boolean[G.getV()]; 
    dfs(G, s); 


} 




private void dfs(Graph G, int v) { 

    marked[v] = true; 
    System.out.print(v); 
    count++; 

    for (int w : G.adj(v)) { 
     if (!marked[w]) { 
      dfs(G, w); 
     } 

    } 


} 

public boolean marked(int w) { 
    return marked[w]; 

} 


public int count() { 
    return count; 
} 

} 

Answer 1

你計劃不輸出任何東西，因爲你的代碼不輸出任何東西。

我只能假設你應該實現你自己的「打印」或「繪圖」功能。

如果你想看到的東西輸出（任何），只是這樣做：

public static void main(String[] args) { 

    System.out.println("START"); 

    Graph mygraph = new Graph(22); 
    mygraph.addEdge(1,2); 
    ... 

    mygraph.addEdge(7,15); 
    System.out.println("END"); 

} 

你應該得到的輸出：

START 
END