如何从java获取命令行bigquery输出

ProcessBuilder processBuilder = new ProcessBuilder("bq", "query", "--format=json", "--nouse_legacy_sql", "SELECT * FROM dataset.table");
processBuilder.redirectErrorStream(true);
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);
}

int exitCode = process.waitFor();

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

public class BigQueryOutput {
    public static void main(String[] args) {
        try {
            ProcessBuilder processBuilder = new ProcessBuilder("bq", "query", "--format=json", "--nouse_legacy_sql", "SELECT * FROM dataset.table");
            processBuilder.redirectErrorStream(true);
            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);
            }

            int exitCode = process.waitFor();
            
            System.out.println("Command output: " + output.toString());
            System.out.println("Exit code: " + exitCode);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}