URL url = new URL("https://example.com/#section1"); String ref = url.getRef(); System.out.println(ref);
URL url = new URL("https://example.com/"); String ref = url.getRef(); if (ref != null) { System.out.println(ref); } else { System.out.println("No reference component found."); }In this example, the URL object is created with the URL string "https://example.com/". The getRef method is then called on the URL object to retrieve the reference component of the URL, which is null since there is no reference component specified in the URL. An if-else statement is then used to check if the reference component is null, and either print the reference component or a message indicating that no reference component was found. The java.net.URL class is part of the Java Standard Library and does not require any additional package libraries.