URL equals(Object) in Java

equals(Object): This method is available in the java.net.URL class of Java.

Syntax:

boolean java.net.URL.equals(Object obj)

This method takes one argument. This method compares this URL for equality with another object.

If the given object is not a URL then this method immediately returns false.

Two URL objects are equal if they have the same protocol, reference equivalent hosts, have the same port number on the host, and have the same file and fragment of the file.

Two hosts are considered equivalent if both hostnames can be resolved into the same IP addresses; else if either hostname can't be resolved, the host names must be equal without regard to the case; or both host names equal to null.

Since host comparison requires name resolution, this operation is blocking operation.

Note: The defined behavior for equals is known to be inconsistent with virtual hosting in HTTP.

Parameters: One parameter is required for this method.

obj: the URL to compare against.

Returns: true if the objects are the same; false otherwise.

Exceptions: NA

Approach

Java

package com.URL;

import java.net.MalformedURLException;
import java.net.URL;

public class URLequals {
    public static void main(String[] args) throws MalformedURLException {

        String protocol = "http", host = "localhost", file = "/hello";
        int port = 8089;
        URL url = new URL(protocol, host, port, file);

        System.out.println(url.equals(url));
    }
}

Output:

true

Some other methods of the URL class

URL(String): This method creates a URL object from the String representation.

URL(URL, String): This method creates a URL by parsing the given spec within a specified context.

URL(String, String, String): This method creates a URL from the specified protocol name, hostname, and file name.

URL(URL, String, URLStreamHandler): This method creates a URL by parsing the given spec with the specified handler within a specified context.

URL(String, String, int, String): This method creates a URL object from the specified protocol, host, port number, and file. host can be expressed as a hostname or a literal IP address.

URL(String, String, int, String, URLStreamHandler): This method creates a URL object from the specified protocol, host, port number, file, and handler.

equals(Object): This method compares this URL for equality with another object.

getAuthority(): This method gets the authority part of this URL.

getContent(): This method gets the contents of this URL.

getContent(Class<?>[]): This method gets the contents of this URL.

getDefaultPort(): This method gets the default port number of the protocol associated with this URL.

getFile(): This method gets the file name of this URL. 

getHost(): This method gets the hostname of this URL, if applicable.

getPath(): This method gets the path part of this URL.

getPort(): This method gets the port number of this URL.

getProtocol(): This method gets the protocol name of this URL.

getQuery(): This method gets the query part of this URL.

getRef(): This method gets the anchor (also known as the "reference") of this URL.

getUserInfo(): This method gets the userInfo part of this URL.

hashCode(): This method creates an integer suitable for hash table indexing.

openConnection(): This method returns a URLConnection instance that represents a connection to the remote object referred to by the URL.

openConnection(Proxy): This method returns a URLConnection instance that represents a connection to the remote object referred to by the URL with Proxy.

openStream(): This method opens a connection to this URL and returns an InputStream for reading from that connection.

sameFile(URL): This method compares two URLs, excluding the fragment component.

URL.setURLStreamHandlerFactory(URLStreamHandlerFactory): This method sets an application's URLStreamHandlerFactory.This method can be called at most once in a given Java VirtualMachine.

toExternalForm(): This method constructs a string representation of this URL. 

toString(): This method constructs a string representation of this URL. The string is created by calling the toExternalForm method of the stream protocol handler for this object.

toURI(): This method returns a java.net.URI equivalent to this URL.