java pipe/process builder 不与 cmd.exe 一起工作

Question

这是我的代码，它只是打开一个命令提示符窗口 7，然后坐下。没有其他的。我希望它发送和接收命令显然。那怎么了？？

String line;
try {
    Process p = Runtime.getRuntime().exec("cmd /c start cmd.exe");
    BufferedReader inp =
        new BufferedReader(
            new InputStreamReader(p.getInputStream()));
    BufferedWriter out =
        new BufferedWriter(
            new OutputStreamWriter(p.getOutputStream()));
    out.append("sometext");
    out.write("Some Text!\n\n");
    out.flush();
    line = inp.readLine();
    System.out.println("response1: " + line );   // that's ok
    out.write("Second Line...\n");
    out.flush();
    line = inp.readLine();
    // returns an empty string, if it returns...
    System.out.println("response2: " + line);    
    inp.close();
    out.close();
} catch (IOException io) {

}

Answer 1

cmd start 将启动一个新的命令提示符窗口，您的输入和输出缓冲区将不会连接到它。