java - 如何提供用户输入以在 java 中处理？

Question

我正在尝试从 java 编译和运行 c 程序。当运行 c 程序时，我可以得到错误和 c 程序的输出文本。但是，如果 c 程序期望用户输入来执行其程序，我如何从 java 代码提供该用户输入？这就是你所做的。

public void runFile() {

        appendToPane(pane, "----------- Program is executing ------------ \n", Color.LIGHT_GRAY);
        Process p;
        try {
            p = Runtime.getRuntime().exec(_TEMP_LOCATION + _FILE_NAME.split(".c")[0]);//exe file exist inside project root folder

            BufferedReader reader1 = new BufferedReader(new InputStreamReader(p.getErrorStream()));
            BufferedReader reader2 = new BufferedReader(new InputStreamReader(p.getInputStream()));
            //OutputStream a = p.getOutputStream();
            String line;
            while ((line = reader1.readLine()) != null) {
                appendToPane(pane, line + "\n", null);
            }
            while ((line = reader2.readLine()) != null) {
                appendToPane(pane, line + "\n", null);
            }
            //p.waitFor();
        } catch (Exception e) {
            e.printStackTrace();
        }
        appendToPane(pane, "----------- executing is done ------------ \n", Color.LIGHT_GRAY);
    }

Answer 1

Process 还为您提供了一个 OutputStream，您可以向其写入内容，这些内容将作为输入传递给您的流程。参见 http://docs.oracle.com/javase/7/docs/api/java/lang/Process.html#getOutputStream() .