Wie führe ich externe JAR-Dateien aus und zeige die Laufzeitausgabe in einer Java-GUI an?

<code class="java">Process proc = Runtime.getRuntime().exec("java -jar A.jar");</code>

<code class="java">InputStream in = proc.getInputStream();
InputStream err = proc.getErrorStream();</code>

<code class="java">import javax.swing.*;
import java.awt.event.*;
import java.io.*;

public class JarExecutor extends JFrame {

    private JTextArea outputArea;
    private JButton buttonA, buttonB;

    public JarExecutor() {
        // ... // Setup GUI components

        // Create buttons
        buttonA = new JButton("A");
        buttonA.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                executeJar("A.jar");
            }
        });
        buttonB = new JButton("B");
        buttonB.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                executeJar("B.jar");
            }
        });

        // ... // Add buttons to GUI

        // Create text area for output
        outputArea = new JTextArea();
        outputArea.setEditable(false);
        outputArea.setLineWrap(true);

        // ... // Add text area to GUI
    }

    private void executeJar(String jarPath) {
        try {
            Process proc = Runtime.getRuntime().exec("java -jar " + jarPath);
            BufferedReader in = new BufferedReader(new InputStreamReader(proc.getInputStream()));
            BufferedReader err = new BufferedReader(new InputStreamReader(proc.getErrorStream()));

            String line;
            while ((line = in.readLine()) != null) {
                outputArea.append(line + "\n");
            }
            while ((line = err.readLine()) != null) {
                outputArea.append(line + "\n");
            }
        } catch (IOException e) {
            outputArea.append("Error executing JAR: " + e.getMessage() + "\n");
        }
    }

    // ... // Main method
}</code>