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Java Standard Edition (SE)

Miscellaneous changes to

Miscellaneous changes to worth mentioning:

Noteworthy bug fixes:

  • InetAddress
    A bug existed in JDK 1.0.2 where one could not create an InetAddress out of a IP address String (for example, "") if a corresponding host name (for example, "") could not be found. This resulted in an UnknownHostException. The bug is fixed in JDK 1.1. Additionally, when an InetAddress is created from an IP address, the corresponding hostname is not looked up until specifically requested (via InetAddress.getHostName()), as a performance enhancement.
  • ServerSocket/DatagramSocket close()
    A bug existed in JDK 1.0.2 where the close() method of ServerSocket and DatagramSocket were synchronized. The result was that if one thread were blocked indefinitely in DatagramSocket.receive() or ServerSocket.accept(), another thread couldn't break the blocking thread out by calling close(). This is fixed in JDK1.1 by making the close() methods unsynchronized.
  • URLConnection
    There was a bug in JDK 1.0.2 where the methods on URLConnection:
    • setRequestProperty()
    • getRequestProperty()
    • getHeaderField()
    • getHeaderFieldInt()
    • getContentLength()
    • getDate()
    etc, did not work. These are fixed in JDK 1.1.

Binding to local port/address:

  • Socket, ServerSocket, DatagramSocket
    These classes has overloaded constructors for binding to a specific local address and port. This is useful and necessary for applications like proxy servers that operate on multi-homed machines, and need particular control over which network interfaces are used.


  • The MulticastSocket class was moved from package into the core API of


  • JDK1.1 introduces a new class, HttpURLConnection which extends URLConnection, and provides additional functionality specific to HTTP:
  • Ability to use all of the request methods with HTTP/1.1, like:
    • GET
    • POST
    • PUT
    • HEAD
    • TRACE
    • DELETE
  • Control over whether to follow HTTP redirects.


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