Chapter 15
The java.net Package

UnknownHostException

Name

Synopsis

Class Name:

java.net.UnknownHostException

Superclass:

java.io.IOException

Immediate Subclasses:

None

Interfaces Implemented:

None

Availability:

JDK 1.0 or later

Description

A UnknownHostException is thrown when a hostname cannot be resolved to an IP address.

Class Summary

public class java.net.UnknownHostException extends java.io.IOException {
  // Constructors
  public UnknownHostException();
  public UnknownHostException(String host);
}

Constructors

UnknownHostException

public UnknownHostException()

Description: This constructor creates an UnknownHostException with no associated detail message.

public UnknownHostException(String host)

Parameters

host: The detail message.

Description

This constructor creates an UnknownHostException with the specified detail message, which should be the hostname that cannot be resolved.

Inherited Methods

Method	Inherited From	Method	Inherited From
`clone()`	`Object`	`equals(Object)`	`Object`
`fillInStackTrace()`	`Throwable`	`finalize()`	`Object`
`getClass()`	`Object`	`getLocalizedMessage()`	`Throwable`
`getMessage()`	`Throwable`	`hashCode()`	`Object`
`notify()`	`Object`	`notifyAll()`	`Object`
`printStackTrace()`	`Throwable`	`printStackTrace(PrintStream)`	`Throwable`
`printStackTrace(PrintWriter)`	`Throwable`	`toString()`	`Throwable`
`wait()`	`Object`	`wait(long)`	`Object`
`wait(long, int)`	`Object`