亦可以使用Runtime呼叫外部程式

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

        List<String> command = new ArrayList<>();
        command.add("C:\\Program Files\\Mozilla Firefox\\firefox.exe");
        
        // 執行cmd命令
        
        ProcessBuilder builder = new ProcessBuilder();
        builder.command(command);
        Process process = builder.start();
        System.out.println(process.isAlive());


    }