Java - how to check installed Node.js version in Java?

package com.dirask.examples;

​

import java.io.IOException;

import java.io.InputStream;

import java.io.IOException;

​

public final class Program {

​

    private final static Runtime RUNTIME = Runtime.getRuntime();

​

    public static String main(String[] args) throws IOException {

​

        Process nodeProcess = RUNTIME.exec(new String[] { "node", "-v" });

        try {

            try (InputStream inputStream = nodeProcess.getInputStream()) {

                String nodeOutput = readText(inputStream);

                String nodeVersion = nodeOutput.trim();

                System.out.println(nodeVersion);  // v16.0.0

            }

        }

        catch (IOException ex) {

            nodeProcess.destroy();

            throw ex;

        }

    }

​

    private static final int BLOCK_SIZE = 1024;

​

    public static String readText(Reader reader) throws IOException {

        StringBuilder builder = new StringBuilder();

        char[] buffer = new char[BLOCK_SIZE];

        while (true) {

            int count = reader.read(buffer, 0, buffer.length);

            if (count == -1) {

                break;

            }

            builder.append(buffer, 0, count);

        }

        return builder.toString();

    }

​

    public static String readText(InputStream stream) throws IOException {

        Reader reader = new InputStreamReader(stream, StandardCharsets.UTF_8);

        return readText(reader);

    }

}