In this example we shall show you how to convert between character set encodings with a CharBuffer in Java. To achieve character set conversions in Java one should perform the following steps:
- Use the Charset class to get the Charset object for utilizing the specific character set
- Use the
newDecoder()API method of the Charset object to construct a new decoder for this charset - Use the
newEncoder()API method of the Charset object to construct a new encoder for this charset - Use the CharBuffer class to wrap the target character sequence into a buffer
- Use the
encode(CharBuffer)anddecode(ByteBuffer)API methods of the encoder and decoder objects respectively to convert to/from the specific character encoding – here “ISO-8859-1”
as demonstrated in the code snippet that follows.
package com.javacodegeeks.snippets.core;
import java.nio.ByteBuffer;
import java.nio.CharBuffer;
import java.nio.charset.CharacterCodingException;
import java.nio.charset.Charset;
import java.nio.charset.CharsetDecoder;
import java.nio.charset.CharsetEncoder;
public class ConvertBetweenCharacterSetEncodingsWithCharBuffer {
public static void main(String[] args) {
try {
// Returns a charset object for the named charset.
Charset charset = Charset.forName("ISO-8859-1");
// Constructs a new decoder for this charset.
CharsetDecoder decoder = charset.newDecoder();
// Constructs a new encoder for this charset.
CharsetEncoder encoder = charset.newEncoder();
// Wrap the character sequence into a buffer.
CharBuffer uCharBuffer = CharBuffer.wrap("Java Code Geeks");
// Encode the remaining content of a single input character buffer to a new byte buffer.
// Converts to ISO-8859-1 bytes and stores them to the byte buffer
ByteBuffer bbuf = encoder.encode(uCharBuffer);
// Decode the remaining content of a single input byte buffer to a new character buffer.
// Converts from ISO-8859-1 bytes and stores them to the character buffer
CharBuffer cbuf = decoder.decode(bbuf);
String s = cbuf.toString();
System.out.println("Original String is: " + s);
}
catch (CharacterCodingException e) {
System.out.println("Character Coding Error: " + e.getMessage());
}
}
}
Output:
Original String is: Java Code Geeks
This was an example of how to convert between character set encodings in Java.
