com.sun.cldc.i18n
Class Helper

java.lang.Object
  com.sun.cldc.i18n.Helper

public class Helper
extends Object

This class provides general helper functions for the J2ME environment.

No application code should reference this class directly.

Version:

CLDC 1.1 03/29/02

Field Summary

static String	defaultEncoding The name of the default character encoding - hardcoded here and in System.getProperty().
static boolean	ISO8859_1_ONLY_SUPPORTED If set to true, then ONLY support ISO8859_1 encodings, although aliases (such as "US_ASCII") are allowed.

Method Summary

static char[]	byteToCharArray(byte[] buffer, int offset, int length) Convert a byte array to a char array
static char[]	byteToCharArray(byte[] buffer, int offset, int length, String enc) Convert a byte array to a char array
static byte[]	charToByteArray(char[] buffer, int offset, int length) Convert a char array to a byte array
static byte[]	charToByteArray(char[] buffer, int offset, int length, String enc) Convert a byte array to a char array
static Reader	getStreamReader(InputStream is) Get a reader for an InputStream
static Reader	getStreamReader(InputStream is, String name) Get a reader for an InputStream
static Writer	getStreamWriter(OutputStream os) Get a writer for an OutputStream
static Writer	getStreamWriter(OutputStream os, String name) Get a writer for an OutputStream
static boolean	isISO8859_1(String encodingName) Is encodingName some variation of "ISO8859_1"?

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

defaultEncoding

public static final String defaultEncoding

The name of the default character encoding - hardcoded here and in System.getProperty().

See Also:

Constant Field Values

ISO8859_1_ONLY_SUPPORTED

public static final boolean ISO8859_1_ONLY_SUPPORTED

If set to true, then ONLY support ISO8859_1 encodings, although aliases (such as "US_ASCII") are allowed.

See Also:

Constant Field Values

Method Detail

getStreamReader

public static Reader getStreamReader(InputStream is)

Get a reader for an InputStream

Parameters:

is - The input stream the reader is for

Returns:

A new reader for the stream

getStreamReader

public static Reader getStreamReader(InputStream is,
                                     String name)
                              throws UnsupportedEncodingException

Get a reader for an InputStream

Parameters:

is - The input stream the reader is for

name - The name of the decoder

Returns:

A new reader for the stream

Throws:

UnsupportedEncodingException - If the encoding is not known

getStreamWriter

public static Writer getStreamWriter(OutputStream os)

Get a writer for an OutputStream

Parameters:

os - The output stream the reader is for

Returns:

A new writer for the stream

getStreamWriter

public static Writer getStreamWriter(OutputStream os,
                                     String name)
                              throws UnsupportedEncodingException

Get a writer for an OutputStream

Parameters:

os - The output stream the reader is for

name - The name of the decoder

Returns:

A new writer for the stream

Throws:

UnsupportedEncodingException - If the encoding is not known

byteToCharArray

public static char[] byteToCharArray(byte[] buffer,
                                     int offset,
                                     int length)

Convert a byte array to a char array

Parameters:

buffer - The byte array buffer

offset - The offset

length - The length

Returns:

A new char array

charToByteArray

public static byte[] charToByteArray(char[] buffer,
                                     int offset,
                                     int length)

Convert a char array to a byte array

Parameters:

buffer - The char array buffer

offset - The offset

length - The length

Returns:

A new byte array

byteToCharArray

public static char[] byteToCharArray(byte[] buffer,
                                     int offset,
                                     int length,
                                     String enc)
                              throws UnsupportedEncodingException

Convert a byte array to a char array

Parameters:

buffer - The byte array buffer

offset - The offset

length - The length

enc - The character encoding

Returns:

A new char array

Throws:

UnsupportedEncodingException - If the encoding is not known

charToByteArray

public static byte[] charToByteArray(char[] buffer,
                                     int offset,
                                     int length,
                                     String enc)
                              throws UnsupportedEncodingException

Convert a byte array to a char array

Parameters:

buffer - The byte array buffer

offset - The offset

length - The length

enc - The character encoding

Returns:

A new char array

Throws:

UnsupportedEncodingException - If the encoding is not known

isISO8859_1

public static boolean isISO8859_1(String encodingName)

Is encodingName some variation of "ISO8859_1"?

Parameters:

encodingName -

Returns:

true if encodingName is some variation of "ISO8859_1".