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## com.sun.mail.pop3
Class POP3Message

    java.lang.Object
      |
      +--javax.mail.Message
            |
            +--javax.mail.internet.MimeMessage
                  |
                  +--com.sun.mail.pop3.POP3Message

All Implemented Interfaces:
  MimePart, Part

public class POP3Message
extends MimeMessage

A POP3 Message. Just like a MimeMessage except that some things are not supported.

Inner classes inherited from class javax.mail.internet.MimeMessage
`MimeMessage.RecipientType`

Inner classes inherited from class javax.mail.Message
`Message.RecipientType`

Fields inherited from class javax.mail.internet.MimeMessage
`content, contentStream, dh, flags, headers, modified, saved`

Fields inherited from class javax.mail.Message
`expunged, folder, msgnum, session`

Fields inherited from interface javax.mail.Part
`ATTACHMENT, INLINE`

Constructor Summary
`POP3Message(Folder folder, int msgno)`

Method Summary
`void` | `addHeader(java.lang.String name, java.lang.String value)` Add this value to the existing values for this header_name.
`void` | `addHeaderLine(java.lang.String line)` Add a raw RFC822 header-line.
`java.util.Enumeration` | `getAllHeaderLines()` Get all header lines as an Enumeration of Strings.
`java.util.Enumeration` | `getAllHeaders()` Return all the headers from this Message as an enumeration of Header objects.
`protected java.io.InputStream` | `getContentStream()` Produce the raw bytes of the content.
`java.lang.String[]` | `getHeader(java.lang.String name)` Get all the headers for this header_name.
`java.lang.String` | `getHeader(java.lang.String name, java.lang.String delimiter)` Get all the headers for this header name, returned as a single String, with headers separated by the delimiter.
`java.util.Enumeration` | `getMatchingHeaderLines(java.lang.String[] names)` Get matching header lines as an Enumeration of Strings.
`java.util.Enumeration` | `getMatchingHeaders(java.lang.String[] names)` Return matching headers from this Message as an Enumeration of Header objects.
`java.util.Enumeration` | `getNonMatchingHeaderLines(java.lang.String[] names)` Get non-matching header lines as an Enumeration of Strings.
`java.util.Enumeration` | `getNonMatchingHeaders(java.lang.String[] names)` Return non-matching headers from this Message as an Enumeration of Header objects.
`int` | `getSize()` Return the size of the content of this message in bytes.
`void` | `invalidate(boolean invalidateHeaders)` Invalidate the cache of content for this message object, causing it to be fetched again from the server the next time it is needed.
`void` | `removeHeader(java.lang.String name)` Remove all headers with this name.
`void` | `saveChanges()` POP3 message can't be changed.
`void` | `setFlags(Flags newFlags, boolean set)` Set the specified flags on this message to the specified value.
`void` | `setHeader(java.lang.String name, java.lang.String value)` Set the value for this header_name.
`java.io.InputStream` | `top(int n)` Fetch the header of the message and the first `n` lines of the raw content of the message.

Methods inherited from class javax.mail.internet.MimeMessage
`addFrom, addRecipients, addRecipients, createInternetHeaders, getAllRecipients, getContent, getContentID, getContentLanguage, getContentMD5, getContentType, getDataHandler, getDescription, getDisposition, getEncoding, getFileName, getFlags, getFrom, getInputStream, getLineCount, getMessageID, getRawInputStream, getReceivedDate, getRecipients, getReplyTo, getSender, getSentDate, getSubject, isMimeType, isSet, parse, reply, setContent, setContent, setContentID, setContentLanguage, setContentMD5, setDataHandler, setDescription, setDescription, setDisposition, setFileName, setFrom, setFrom, setRecipients, setRecipients, setReplyTo, setSender, setSentDate, setSubject, setSubject, setText, setText, updateHeaders, writeTo, writeTo`

Methods inherited from class javax.mail.Message
`addRecipient, getFolder, getMessageNumber, isExpunged, match, setExpunged, setFlag, setMessageNumber, setRecipient`

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

Constructor Detail

### POP3Message

    public POP3Message(Folder folder,
                       int msgno)
                throws MessagingException

Method Detail

### setFlags

    public void setFlags(Flags newFlags,
                         boolean set)
                  throws MessagingException

  Set the specified flags on this message to the specified value.
  Overrides:
    `setFlags` in class `MimeMessage`
  Parameters:
    `newFlags` - the flags to be set
    `set` - the value to be set

### getSize

    public int getSize()
                throws MessagingException

  Return the size of the content of this message in bytes. Returns -1 if the size cannot be determined.

  Note that this number may not be an exact measure of the content size and may or may not account for any transfer encoding of the content.

  Overrides:
    `getSize` in class `MimeMessage`
  Returns:
    size of content in bytes
  Throws:
    `MessagingException` -

### getContentStream

    protected java.io.InputStream getContentStream()
                                            throws MessagingException

  Produce the raw bytes of the content. The data is fetched using the POP3 RETR command.
  Overrides:
    `getContentStream` in class `MimeMessage`
  See Also:
    `MimeMessage.contentStream`

### invalidate

    public void invalidate(boolean invalidateHeaders)

  Invalidate the cache of content for this message object, causing it to be fetched again from the server the next time it is needed. If `invalidateHeaders` is true, invalidate the headers as well.
  Parameters:
    `invalidateHeaders` - invalidate the headers as well?

### top

    public java.io.InputStream top(int n)
                            throws MessagingException

  Fetch the header of the message and the first `n` lines of the raw content of the message. The headers and data are available in the returned InputStream.
  Parameters:
    `n` - number of lines of content to fetch
  Returns:
    InputStream containing the message headers and n content lines

### getHeader

    public java.lang.String[] getHeader(java.lang.String name)
                                 throws MessagingException

  Get all the headers for this header_name. Note that certain headers may be encoded as per RFC 2047 if they contain non US-ASCII characters and these should be decoded.

  Overrides:
    `getHeader` in class `MimeMessage`
  Parameters:
    `name` - name of header
  Returns:
    array of headers
  Throws:
    `MessagingException` -
  See Also:
    `MimeUtility`

### getHeader

    public java.lang.String getHeader(java.lang.String name,
                                      java.lang.String delimiter)
                               throws MessagingException

  Get all the headers for this header name, returned as a single String, with headers separated by the delimiter. If the delimiter is `null`, only the first header is returned.
  Overrides:
    `getHeader` in class `MimeMessage`
  Parameters:
    `header_name` - the name of this header
  Returns:
    the value fields for all headers with this name
  Throws:
    `MessagingException` -

### setHeader

    public void setHeader(java.lang.String name,
                          java.lang.String value)
                   throws MessagingException

  Set the value for this header_name. Throws IllegalWriteException because POP3 messages are read-only.
  Overrides:
    `setHeader` in class `MimeMessage`
  Parameters:
    `name` - header name
    `value` - header value
  Throws:
    `IllegalWriteException` - because the underlying implementation does not support modification
    `IllegalStateException` - if this message is obtained from a READ_ONLY folder.
  See Also:
    `MimeUtility`

### addHeader

    public void addHeader(java.lang.String name,
                          java.lang.String value)
                   throws MessagingException

  Add this value to the existing values for this header_name. Throws IllegalWriteException because POP3 messages are read-only.
  Overrides:
    `addHeader` in class `MimeMessage`
  Parameters:
    `name` - header name
    `value` - header value
  Throws:
    `IllegalWriteException` - because the underlying implementation does not support modification
    `IllegalStateException` - if this message is obtained from a READ_ONLY folder.
  See Also:
    `MimeUtility`

### removeHeader

    public void removeHeader(java.lang.String name)
                      throws MessagingException

  Remove all headers with this name. Throws IllegalWriteException because POP3 messages are read-only.
  Overrides:
    `removeHeader` in class `MimeMessage`
  Throws:
    `IllegalWriteException` - because the underlying implementation does not support modification
    `IllegalStateException` - if this message is obtained from a READ_ONLY folder.

### getAllHeaders

    public java.util.Enumeration getAllHeaders()
                                        throws MessagingException

  Return all the headers from this Message as an enumeration of Header objects.

  Note that certain headers may be encoded as per RFC 2047 if they contain non US-ASCII characters and these should be decoded.

  Overrides:
    `getAllHeaders` in class `MimeMessage`
  Returns:
    array of header objects
  Throws:
    `MessagingException` -
  See Also:
    `MimeUtility`

### getMatchingHeaders

    public java.util.Enumeration getMatchingHeaders(java.lang.String[] names)
                                             throws MessagingException

  Return matching headers from this Message as an Enumeration of Header objects.
  Overrides:
    `getMatchingHeaders` in class `MimeMessage`
  Throws:
    `MessagingException` -

### getNonMatchingHeaders

    public java.util.Enumeration getNonMatchingHeaders(java.lang.String[] names)
                                                throws MessagingException

  Return non-matching headers from this Message as an Enumeration of Header objects.
  Overrides:
    `getNonMatchingHeaders` in class `MimeMessage`
  Throws:
    `MessagingException` -

### addHeaderLine

    public void addHeaderLine(java.lang.String line)
                       throws MessagingException

  Add a raw RFC822 header-line. Throws IllegalWriteException because POP3 messages are read-only.
  Overrides:
    `addHeaderLine` in class `MimeMessage`
  Throws:
    `IllegalWriteException` - because the underlying implementation does not support modification
    `IllegalStateException` - if this message is obtained from a READ_ONLY folder.

### getAllHeaderLines

    public java.util.Enumeration getAllHeaderLines()
                                            throws MessagingException

  Get all header lines as an Enumeration of Strings. A Header line is a raw RFC822 header-line, containing both the "name" and "value" field.
  Overrides:
    `getAllHeaderLines` in class `MimeMessage`
  Throws:
    `MessagingException` -

### getMatchingHeaderLines

    public java.util.Enumeration getMatchingHeaderLines(java.lang.String[] names)
                                                 throws MessagingException

  Get matching header lines as an Enumeration of Strings. A Header line is a raw RFC822 header-line, containing both the "name" and "value" field.
  Overrides:
    `getMatchingHeaderLines` in class `MimeMessage`
  Throws:
    `MessagingException` -

### getNonMatchingHeaderLines

    public java.util.Enumeration getNonMatchingHeaderLines(java.lang.String[] names)
                                                    throws MessagingException

  Get non-matching header lines as an Enumeration of Strings. A Header line is a raw RFC822 header-line, containing both the "name" and "value" field.
  Overrides:
    `getNonMatchingHeaderLines` in class `MimeMessage`
  Throws:
    `MessagingException` -

### saveChanges

    public void saveChanges()
                     throws MessagingException

  POP3 message can't be changed. This method throws IllegalWriteException.
  Overrides:
    `saveChanges` in class `MimeMessage`
  Throws:
    `IllegalWriteException` - because the underlying implementation does not support modification

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