How do you represent a URL in Java programming language?

The Java API provides the URL class which can be used to represent the URL address. You can create the URL object if you have the URL address string. The URL class provides getter methods to get the components of the URL such as host name, port, path, query parameters etc.

String urlString = 'http://www.codinggrid.com';
 URL url = new URL(urlString);

How do you connect to a URL resource in Java programming language?

The Java API provides the 'URLConnecton' class which can be used to create a connection to a URL. If you have a URL object, you can get the URLConnection object by calling openConnection() method on the URL object. Once you have the URLConnection object you can connect to the URL resource by calling the connect() method on the URLConnection object. You can use the URLRequest object to setup parameters and properties that you may need for making the URL connection.

String urlString = 'http://www.codinggrid.com';
URL myUrl = new URL(urlString);
URLConnection myUrlConnection = myUrl.openConnection();
myUrlConnection.connect();

What are the key steps in reading from a URL connection?

1. Create the URL object
2. Create URLConnection object
3. Open connection to URL
4. Get input stream from connection
5. Read from input stream
6. Close input stream

What are the key steps in writing to a URL connection?

1. Create the URL object
2. Create URLConnection object
3. Open connection to URL
4. Get output stream from connection
5. Write to output stream
6. Close output stream

What are some of the key methods provided in the URL class?

Following are some key methods provided in the URL class

openConnection() – Returns a URLConnection object that represents a connection to the URL

getContent() – Gets the contents of the URL

getHost() – Gets the host name of the URL

getPath() – Gets the path of the URL

getPort() – Gets the port of the URL

getProtocol() – Gets the protocol name of the URL

What are sockets? How are sockets represented in the Java programming language?

Sockets are end points in the communication link between a client program and a server program exchanging data over a network.

On the server side: a socket is bound to a specific port number. The server listens to the socket, waiting for a client to make a connection request.If a connection from a client is successful, the existing socked is used to communicate with that client. In addition a new socket is created and ties to the same port so that the server can listen to new connections from other clients.A new

On the client side: ...

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What are the key steps in reading writing to sockets?

1. Open a socket
2. Open an input stream and output stream to a socket

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What is the difference between TCP and UDP protocols?

TCP is a protocol that provides a reliable, point-to-point communication channel that client-server application use to communicate with each other. To communicate over TCP, a client program and server program must first establish a connection to each other through sockets at each end of the communication channel. To communicate, the client and server reads from and writes to the sockets bound to the connection.

Like TCP, UDP is protocol that provides a communication channel that client-server applications use to communicate with each other. But unlike TCP...

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What is datagram? What are some key classes defined in the Java programming language to work with datagrams?

Datagram is an independent, self-contained packet of information send over the network between server and client programs in UDP protocol. The delivery of datagrams to their destinations in not guaranteed. The order of arrival...

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How do you broadcast datagrams to multiple clients?

Using UDP protocol, a server can send or broadcast datagrams to multiple clients. Java programming language provides java.net.MultigramSocket which can be used to broadcast datagrams to multiple client programs...

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What is a network interface?

A network interface is the point of interconnection between a computer and a private or public network.

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How do you get a list of IP addresses that are assigned to a network interface?

You can get a list of IP addresses that are assigned to a network interface using the NetworkInterface class.

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