File	Doc	Category	Size	Date	Package
InetSocketAddress.java	API Doc	Java SE 6 API	9640	Tue Jun 10 00:25:40 BST 2008	java.net

InetSocketAddress

• java.lang.Object
  • java.net.SocketAddress

Fields Summary
private String	hostname
private InetAddress	addr
private int	port
private static final long	serialVersionUID

Constructors Summary
private InetSocketAddress()
public InetSocketAddress(int port) Creates a socket address where the IP address is the wildcard address and the port number a specified value. A valid port value is between 0 and 65535. A port number of zero will let the system pick up an ephemeral port in a bind operation. param port The port number throws IllegalArgumentException if the port parameter is outside the specified range of valid port values. this(InetAddress.anyLocalAddress(), port);
public InetSocketAddress(InetAddress addr, int port) Creates a socket address from an IP address and a port number. A valid port value is between 0 and 65535. A port number of zero will let the system pick up an ephemeral port in a bind operation. A null address will assign the wildcard address. param addr The IP address param port The port number throws IllegalArgumentException if the port parameter is outside the specified range of valid port values. if (port < 0 || port > 0xFFFF) { throw new IllegalArgumentException("port out of range:" + port); } this.port = port; if (addr == null) this.addr = InetAddress.anyLocalAddress(); else this.addr = addr;
public InetSocketAddress(String hostname, int port) Creates a socket address from a hostname and a port number. An attempt will be made to resolve the hostname into an InetAddress. If that attempt fails, the address will be flagged as unresolved. If there is a security manager, its checkConnect method is called with the host name as its argument to check the permissiom to resolve it. This could result in a SecurityException. A valid port value is between 0 and 65535. A port number of zero will let the system pick up an ephemeral port in a bind operation. param hostname the Host name param port The port number throws IllegalArgumentException if the port parameter is outside the range of valid port values, or if the hostname parameter is null. throws SecurityException if a security manager is present and permission to resolve the host name is denied. see #isUnresolved() if (port < 0 || port > 0xFFFF) { throw new IllegalArgumentException("port out of range:" + port); } if (hostname == null) { throw new IllegalArgumentException("hostname can't be null"); } try { addr = InetAddress.getByName(hostname); } catch(UnknownHostException e) { this.hostname = hostname; addr = null; } this.port = port;

Methods Summary
public static java.net.InetSocketAddress	createUnresolved(java.lang.String host, int port) Creates an unresolved socket address from a hostname and a port number. No attempt will be made to resolve the hostname into an InetAddress. The address will be flagged as unresolved. A valid port value is between 0 and 65535. A port number of zero will let the system pick up an ephemeral port in a bind operation. param host the Host name param port The port number throws IllegalArgumentException if the port parameter is outside the range of valid port values, or if the hostname parameter is null. see #isUnresolved() return a InetSocketAddress representing the unresolved socket address since 1.5 if (port < 0 || port > 0xFFFF) { throw new IllegalArgumentException("port out of range:" + port); } if (host == null) { throw new IllegalArgumentException("hostname can't be null"); } InetSocketAddress s = new InetSocketAddress(); s.port = port; s.hostname = host; s.addr = null; return s;
public final boolean	equals(java.lang.Object obj) Compares this object against the specified object. The result is true if and only if the argument is not null and it represents the same address as this object. Two instances of InetSocketAddress represent the same address if both the InetAddresses (or hostnames if it is unresolved) and port numbers are equal. If both addresses are unresolved, then the hostname & the port number are compared. param obj the object to compare against. return true if the objects are the same; false otherwise. see java.net.InetAddress#equals(java.lang.Object) if (obj == null || !(obj instanceof InetSocketAddress)) return false; InetSocketAddress sockAddr = (InetSocketAddress) obj; boolean sameIP = false; if (this.addr != null) sameIP = this.addr.equals(sockAddr.addr); else if (this.hostname != null) sameIP = (sockAddr.addr == null) && this.hostname.equals(sockAddr.hostname); else sameIP = (sockAddr.addr == null) && (sockAddr.hostname == null); return sameIP && (this.port == sockAddr.port);
public final java.net.InetAddress	getAddress() Gets the InetAddress. return the InetAdress or null if it is unresolved. return addr;
public final java.lang.String	getHostName() Gets the hostname. return the hostname part of the address. if (hostname != null) return hostname; if (addr != null) return addr.getHostName(); return null;
final java.lang.String	getHostString() Returns the hostname, or the String form of the address if it doesn't have a hostname (it was created using a litteral). This has the benefit of not attemptimg a reverse lookup. return the hostname, or String representation of the address. since 1.6 if (hostname != null) return hostname; if (addr != null) { if (addr.hostName != null) return addr.hostName; else return addr.getHostAddress(); } return null;
public final int	getPort() Gets the port number. return the port number. return port;
public final int	hashCode() Returns a hashcode for this socket address. return a hash code value for this socket address. if (addr != null) return addr.hashCode() + port; if (hostname != null) return hostname.hashCode() + port; return port;
public final boolean	isUnresolved() Checks whether the address has been resolved or not. return true if the hostname couldn't be resolved into an InetAddress. return addr == null;
private void	readObject(java.io.ObjectInputStream s) s.defaultReadObject(); // Check that our invariants are satisfied if (port < 0 || port > 0xFFFF) { throw new InvalidObjectException("port out of range:" + port); } if (hostname == null && addr == null) { throw new InvalidObjectException("hostname and addr " + "can't both be null"); }
public java.lang.String	toString() Constructs a string representation of this InetSocketAddress. This String is constructed by calling toString() on the InetAddress and concatenating the port number (with a colon). If the address is unresolved then the part before the colon will only contain the hostname. return a string representation of this object. if (isUnresolved()) { return hostname + ":" + port; } else { return addr.toString() + ":" + port; }