package boot;
import java.awt.Desktop;
import java.awt.GraphicsEnvironment;
import java.net.URI;
import javax.swing.JOptionPane;
public class StarRodBootstrap
{
public static void main(String[] args)
{
boolean isCommandLine = args.length > 0 || GraphicsEnvironment.isHeadless();
String version = System.getProperty("java.version");
if (getMajorVersion(version) < 17) {
showDownloadMessage(isCommandLine, version);
System.exit(-1);
}
try {
launchApp(isCommandLine, args);
}
catch (Exception e) {
System.err.println("Exception during bootstrap: " + e.getMessage());
e.printStackTrace();
}
}
private static int getMajorVersion(String version)
{
String[] parts = version.split("\\.");
if (parts[0].equals("1")) {
// Java 8 or earlier: format "1.x"
return Integer.parseInt(parts[1]);
}
else {
// Java 9 or later: format "x"
return Integer.parseInt(parts[0]);
}
}
private static void launchApp(boolean isCommandLine, String[] args) throws Exception
{
String javaHome = System.getProperty("java.home");
String javaExec = javaHome + "/bin/java";
String jarPath = StarRodBootstrap.class
.getProtectionDomain()
.getCodeSource()
.getLocation()
.toURI()
.getPath();
String[] command = new String[4 + args.length];
command[0] = javaExec;
command[1] = "-cp";
command[2] = jarPath;
command[3] = "app.StarRodMain";
System.arraycopy(args, 0, command, 4, args.length);
ProcessBuilder processBuilder = new ProcessBuilder(command);
processBuilder.inheritIO();
Process process = processBuilder.start();
process.waitFor();
}
private static void showDownloadMessage(boolean isCommandLine, String version)
{
String downloadUrl = "https://www.oracle.com/java/technologies/downloads/";
if (isCommandLine) {
System.out.println("Java 17 or later is required to run this application.");
System.out.println("Your current version: " + version);
System.out.println("Download the latest version from:");
System.out.println(downloadUrl);
}
else {
String errorMsg = ""
+ "Java 17 or later is required to run this application.
"
+ "Your current version: " + version + "
"
+ "Download the latest version from:
"
+ "" + downloadUrl + ""
+ "";
int result = JOptionPane.showOptionDialog(
null,
errorMsg,
"Java Version Error",
JOptionPane.DEFAULT_OPTION,
JOptionPane.ERROR_MESSAGE,
null,
new String[] { "Open Link", "Close" },
"Open Link"
);
if (result == 0) {
openLink(downloadUrl);
}
}
}
private static void openLink(String url)
{
try {
if (Desktop.isDesktopSupported()) {
Desktop.getDesktop().browse(new URI(url));
}
else {
System.err.println("Desktop is not supported. Open this link manually: " + url);
}
}
catch (Exception e) {
System.err.println("Failed to open link: " + e.getMessage());
}
}
}