使用PrintWriter沒有輸出到文件

Question

我沒有編譯錯誤，但我的代碼沒有輸出任何保存的文件。 代碼確實創建了文件，但它們是空的。 有人看到我做錯了嗎？

public class CellAutomataTest {
  public static void main(String[] args)
  {
    int rule = 120;//Integer.parseInt(args[0]);
    int numGen = 5;//Integer.parseInt(args[1]);
    String fileStem = "ca";//args[2];
    int width = 400;//Integer.parseInt(args[3]);
    int height = 400;//Integer.parseInt(args[4]);

    CellAutomata test = new CellAutomata(numGen, rule);

    PrintWriter writer = null;
    try {
        writer = new PrintWriter(new FileWriter(fileStem + ".js"));
    } catch (IOException ex) {
        Logger.getLogger(CellAutomataTest.class.getName()).log(Level.SEVERE, null, ex);
    }
    PrintWriter writer2 = null;
    try {
        writer2 = new PrintWriter(new FileWriter(fileStem + ".html"));
    } catch (IOException ex) {
        Logger.getLogger(CellAutomataTest.class.getName()).log(Level.SEVERE, null, ex);
    }

    writer.println("function draw() {");
    writer.println("var canvas = document.getElementById('CellAutomata');");
    writer.println("if (canvas && canvas.getContext) {");
    writer.println("var context = canvas.getContext('2d');");

    test.simulate(writer, width, height);

    writer2.println("<html>");
    writer2.println("<head>");
    writer2.println("<script src=\"" + fileStem + ".js></script>");
    writer2.println("<style type=\"text/css\">");
    writer2.println("canvas { border: 1px solid black; }");
    writer2.println("</style> </head>");
    writer2.println("<body onload=\"draw();\">");
    writer2.println("<h1>Cellular Automata with Rule " + rule + "</h1>");
    writer2.println("<canvas id=\"CellAutomata\" width=\"" + width + "\" height=\"" + height + "\">");
    writer2.println("<p>Your browser doesn't support canvas.</p>");
    writer2.println("</canvas> </body> </html>");
  }
}

Answer 1

你需要使用：

writer2.flush();
writer2.close();

實際保存文件。

使用PrintWriter沒有輸出到文件

問題描述

1 個解決方案

解決方案1
8 2012-10-22 01:13:09

使用PrintWriter沒有輸出到文件

問題描述

1 個解決方案

解決方案1 8 2012-10-22 01:13:09

解決方案1
8 2012-10-22 01:13:09