PortUnreachableException (Java Platform SE 8 )
Keywords: java.net.PortUnreachableException class
Date: 2026-04-24

compact1, compact2, compact3
java.net

## Class PortUnreachableException

- java.lang.Object
- - java.lang.Throwable
  - - java.lang.Exception
    - - java.io.IOException
      - - java.net.SocketException
        - - java.net.PortUnreachableException

- All Implemented Interfaces:
    Serializable

      public class PortUnreachableException
      extends SocketException

  Signals that an ICMP Port Unreachable message has been received on a connected datagram.
  Since:
    1.4
  See Also:
    Serialized Form

- - ### Constructor Summary

    Constructors
    Constructor and Description
    `PortUnreachableException()` Construct a new `PortUnreachableException` with no detailed message.
    `PortUnreachableException(String msg)` Constructs a new `PortUnreachableException` with a detail message.

  - ### Method Summary

    - ### Methods inherited from class java.lang.Throwable

      `addSuppressed, fillInStackTrace, getCause, getLocalizedMessage, getMessage, getStackTrace, getSuppressed, initCause, printStackTrace, printStackTrace, printStackTrace, setStackTrace, toString`

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

- - ### Constructor Detail

    - #### PortUnreachableException

          public PortUnreachableException(String msg)

      Constructs a new `PortUnreachableException` with a detail message.
      Parameters:
        `msg` - the detail message

    - #### PortUnreachableException

          public PortUnreachableException()

      Construct a new `PortUnreachableException` with no detailed message.

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