Question

我在阵列中有一个迷宫板，但似乎无法弄清楚如何将其保存为txt文件然后将其打印出来？

String [][] board = new String [][] {
        {"#","#","#"," "," ","#" ,"#","#","#"},
        {"#","#"," ","#"," ","#","#"," ","#"},
        {"#"," "," "," ","#"," "," "," "," "},
        {"#","#","#","#","#","#","#"," ","#"},
    };

    System.out.println(Arrays.toString(board));

    File boardFile = new File("board.txt");
    PrintWriter boardPW = new PrintWriter(boardFile);
    boardPW.println(board);
    Scanner scan = new Scanner(boardFile);
    while(scan.hasNextLine()) {
        System.out.println(scan.nextLine());

    }

我觉得这是完全错误但值得一试！哈哈

Answer 1

要指出两点：

在java中打印数组时，您需要浏览它们并打印每个元素 - 打印数组println(board);的名称将无法获得所需的结果。
使用Printwriters写入文件时，请记得关闭它们。

我还添加了try / catch块，但我假设您使用了抛出异常的方法？

更新代码：

    String [][] board = new String [][] {
        {"#","#","#"," "," ","#" ,"#","#","#"},
        {"#","#"," ","#"," ","#","#"," ","#"},
        {"#"," "," "," ","#"," "," "," "," "},
        {"#","#","#","#","#","#","#"," ","#"},
    };

    File boardFile = new File("board.txt");
    try{
        PrintWriter boardPW = new PrintWriter(boardFile);
        for(int i = 0 ; i < board.length; i++){
            for(int j = 0 ; j < board[i].length; j++){
                boardPW.print(board[i][j]);
            }
            boardPW.println();
        }
        boardPW.close();
    }
    catch(Exception e){
        e.printStackTrace();
    }

    try{
        Scanner scan = new Scanner(boardFile);
        while(scan.hasNextLine()) {
            System.out.println(scan.nextLine());
        }
    }
    catch(Exception e){
        e.printStackTrace();
    }

试图将数组打印为文件？

1 个答案: