DaytimeUDPClient

java.lang.Object
- org.apache.commons.net.DatagramSocketClient
- - org.apache.commons.net.daytime.DaytimeUDPClient

All Implemented Interfaces:

java.lang.AutoCloseable
```
public final class DaytimeUDPClient
extends DatagramSocketClient
```
The DaytimeUDPClient class is a UDP implementation of a client for the Daytime protocol described in RFC 867. To use the class, merely open a local datagram socket with open and call getTime to retrieve the daytime string, then call close to close the connection properly. Unlike DaytimeTCPClient, successive calls to getTime are permitted without re-establishing a connection. That is because UDP is a connectionless protocol and the Daytime protocol is stateless.

See Also:

DaytimeTCPClient

Field Summary

Fields
Modifier and Type	Field	Description
`static int`	`DEFAULT_PORT`	The default daytime port.
`private byte[]`	`dummyData`
`private byte[]`	`timeData`	Received dates should be less than 256 bytes.

Fields inherited from class org.apache.commons.net.DatagramSocketClient
_isOpen_, _socket_, _socketFactory_, _timeout_

Constructor Summary

Constructors
Constructor Description

DaytimeUDPClient()
Constructs a new instance.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`java.lang.String`	`getTime(java.net.InetAddress host)`	Gets the time string from the specified server and port and returns it.
`java.lang.String`	`getTime(java.net.InetAddress host, int port)`	Gets the time string from the specified server and port and returns it.

Methods inherited from class org.apache.commons.net.DatagramSocketClient
checkOpen, close, getCharset, getCharsetName, getDefaultTimeout, getDefaultTimeoutDuration, getLocalAddress, getLocalPort, getSoTimeout, getSoTimeoutDuration, isOpen, open, open, open, setCharset, setDatagramSocketFactory, setDefaultTimeout, setDefaultTimeout, setSoTimeout, setSoTimeout

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - DEFAULT_PORT
```
public static final int DEFAULT_PORT
```
    The default daytime port. It is set to 13 according to RFC 867.
    
    See Also:
    
    Constant Field Values
  - dummyData
```
private final byte[] dummyData
```
  - timeData
```
private final byte[] timeData
```
    Received dates should be less than 256 bytes.
- Constructor Detail
  - DaytimeUDPClient
```
public DaytimeUDPClient()
```
    Constructs a new instance.
- Method Detail
  - getTime
```
public java.lang.String getTime(java.net.InetAddress host)
                         throws java.io.IOException
```
    Gets the time string from the specified server and port and returns it.
    Shorthand for getTime(host, DaytimeUDPClient.DEFAULT_PORT);
    
    Parameters:
    
    host - the host
    
    Returns:
    
    the time
    
    Throws:
    
    java.io.IOException - on error
  - getTime
```
public java.lang.String getTime(java.net.InetAddress host,
                                int port)
                         throws java.io.IOException
```
    Gets the time string from the specified server and port and returns it.
    
    Parameters:
    
    host - The address of the server.
    
    port - The port of the service.
    
    Returns:
    
    The time string.
    
    Throws:
    
    java.io.IOException - If an error occurs while retrieving the time.