is it possible to open urls in BlueJ. For example in PHP I can use the function file_get_contents()
Is there something equal in BlueJ?
You need to look at using a buffered reader and using the URL object in Java.
It's basically something like this:
URL url = new URL("http://myurl.com");
URLConnection conn = url.openConnection();
BufferedReader reader = new BufferedReader(new InputStreamReader(conn.getInputStream()));
String input = "";
while((input = reader.readLine())!=null) {
System.out.println(input);
}