Java calls exe file, there is an input output

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.nio.charset.Charset;

public class Main {
    public static void main(String[] args) {
        String cmdStr = "C:\\Users\\user\\Desktop\\java-python\\src\\dist\\python.exe 鸡蛋测试";
        Runtime run = Runtime.getRuntime();
        try {
            Process process = run.exec(cmdStr);
            InputStream in = process.getInputStream();
            InputStreamReader reader = new InputStreamReader(in, Charset.forName("GBK"));
            BufferedReader br = new BufferedReader(reader);
            StringBuffer sb = new StringBuffer();
            String message;
            while((message = br.readLine()) != null) {
                sb.append(message);
            }
            System.out.println(sb);
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

    }
}