Java 运行时 getInputStream 忽略大多数终端命令输出

Question

我正在编写一个 Java 程序来捕获终端命令的输出。在“正常”条件下，即我自己直接在终端中执行命令时，我可以看到以下结果：

但是，我的 Java 程序呈现的输出仅捕获其中的一小部分，请参见此处：

这是我所说的代码库：

import java.io.*;

class evmTest {

    public static void main(String[] args) {
        String evmResult = "";

        String evmCommand = "evm --debug --code 7f00000000000000000000000000000000000000000000000000000000000000027f00000000000000000000000000000000000000000000000000000000000000027f00000000000000000000000000000000000000000000000000000000000000020101 run";
        try {
            Runtime r = Runtime.getRuntime();
            Process p = r.exec(evmCommand);

            BufferedReader in = new BufferedReader(new
            InputStreamReader(p.getInputStream()));
            String inputLine;
            while ((inputLine = in.readLine()) != null) {
                System.out.println(inputLine);
                evmResult += inputLine;
            }
            in.close();

        } catch (IOException e) {
            System.out.println(e);
        }

    }
}

到目前为止，我无法确定为什么该代码只能发出微不足道的0x。我发布了这个问题，希望有人能够帮助我找出这个错误的原因。

Answer 1

这样做：

import java.io.*;

class evmTest {

public static void main(String[] args) {
    String evmResult = "";

    String evmCommand = "evm --debug --code 7f00000000000000000000000000000000000000000000000000000000000000027f00000000000000000000000000000000000000000000000000000000000000027f00000000000000000000000000000000000000000000000000000000000000020101 run";
    try {

        Runtime rt = Runtime.getRuntime();
        String command = "evm --debug --code 7f00000000000000000000000000000000000000000000000000000000000000027f00000000000000000000000000000000000000000000000000000000000000027f00000000000000000000000000000000000000000000000000000000000000020101 run";
        Process proc = rt.exec(command);

        BufferedReader stdInput = new BufferedReader(new 
             InputStreamReader(proc.getInputStream()));

        BufferedReader stdError = new BufferedReader(new 
             InputStreamReader(proc.getErrorStream()));

        // read the output from the command
        System.out.println("Here is the standard output of the command:\n");
        String s = null;
        while ((s = stdInput.readLine()) != null) {
            System.out.println(s);
        }

        // read any errors from the attempted command
        System.out.println("Here is the standard error of the command (if any):\n");
        while ((s = stdError.readLine()) != null) {
            System.out.println(s);
        }

    } catch (IOException e) {
        System.out.println(e);
    }

}

}