Encodes the specified string into an immutable sequence of bytes using the US-ASCII charset. - Java java.nio

Java examples for java.nio:CharBuffer

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Description

Encodes the specified string into an immutable sequence of bytes using the US-ASCII charset.

Demo Code

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 * regarding copyright ownership.  The ASF licenses this file   *
 * to you under the Apache License, Version 2.0 (the            *
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import java.nio.ByteBuffer;
import java.nio.CharBuffer;
import java.nio.charset.Charset;

public class Main{
    public static void main(String[] argv) throws Exception{
        String string = "java2s.com";
        System.out.println(encode(string));
    }//from  ww  w  .  j a v a  2 s.c  o m
    /**
     * Encodes the specified string into an immutable sequence of bytes using
     * the US-ASCII charset.
     *
     * @param string
     *            string to encode.
     * @return encoded string as an immutable sequence of bytes.
     */
    public static ByteSequence encode(String string) {
        if (string == null) {
            return null;
        }
        ByteArrayBuffer buf = new ByteArrayBuffer(string.length());
        for (int i = 0; i < string.length(); i++) {
            buf.append((byte) string.charAt(i));
        }
        return buf;
    }
    /**
     * Encodes the specified string into an immutable sequence of bytes using
     * the specified charset.
     *
     * @param charset
     *            Java charset to be used for the conversion.
     * @param string
     *            string to encode.
     * @return encoded string as an immutable sequence of bytes.
     */
    public static ByteSequence encode(Charset charset, String string) {
        if (string == null) {
            return null;
        }
        if (charset == null) {
            charset = Charset.defaultCharset();
        }
        ByteBuffer encoded = charset.encode(CharBuffer.wrap(string));
        ByteArrayBuffer buf = new ByteArrayBuffer(encoded.remaining());
        buf.append(encoded.array(), encoded.position(), encoded.remaining());
        return buf;
    }
}

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