DevTerminalLauncherJar.java

import java.io.IOException;
import java.io.InputStream;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.StandardCopyOption;
import javax.swing.JOptionPane;

public final class DevTerminalLauncherJar {
    private static final String EXE_RESOURCE = "/DevTerminalLauncher.exe";

    private DevTerminalLauncherJar() {
    }

    public static void main(String[] args) {
        try {
            Path executable = extractExecutable();
            Process process = new ProcessBuilder(executable.toString()).start();
            process.waitFor();
            deleteExtractedExecutable(executable);
        } catch (Exception exception) {
            showError(exception);
        }
    }

    private static Path extractExecutable() throws IOException {
        try (InputStream input = DevTerminalLauncherJar.class.getResourceAsStream(EXE_RESOURCE)) {
            if (input == null) {
                throw new IOException("Bundled executable was not found in the JAR.");
            }
            Path executable = Files.createTempFile("DevTerminalLauncher-", ".exe");
            Files.copy(input, executable, StandardCopyOption.REPLACE_EXISTING);
            return executable;
        }
    }

    private static void deleteExtractedExecutable(Path executable) {
        try {
            Files.deleteIfExists(executable);
        } catch (IOException ignored) {
            // The temporary file can be cleaned up by the operating system later.
        }
    }

    private static void showError(Exception exception) {
        JOptionPane.showMessageDialog(null, exception.getMessage(), "Dev Terminal Launcher", JOptionPane.ERROR_MESSAGE);
    }
}