如何获取echo命令的输出？

import subprocess

result = subprocess.run(['echo', 'Hello'], capture_output=True, text=True)
output = result.stdout.strip()
print(output)

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class EchoExample {
    public static void main(String[] args) throws IOException {
        ProcessBuilder processBuilder = new ProcessBuilder("echo", "Hello");
        Process process = processBuilder.start();

        BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream()));
        String line;
        StringBuilder output = new StringBuilder();
        while ((line = reader.readLine()) != null) {
            output.append(line);
        }

        System.out.println(output.toString());
    }
}