Kodejava

package org.kodejava.example.nio;

import java.nio.charset.CharsetDecoder;
import java.nio.charset.Charset;
import java.nio.charset.CharacterCodingException;
import java.nio.CharBuffer;
import java.nio.ByteBuffer;
import java.util.Arrays;

public class NonAsciiValidation {
    public static void main(String[] args) {
        //
        // This string contains a non ASCII character which will produce exception
        // in this program. While the second string has a valid ASCII only chars.
        //
        byte[] invalidBytes = "Copyright © 2005-2009 Kode Java Org".getBytes();
        byte[] validBytes = "Copyright (c) 2005-2009 Kode Java Org".getBytes();

        //
        // Returns a charset object for the named charset.
        //
        CharsetDecoder decoder = Charset.forName("US-ASCII").newDecoder();
        try {
            CharBuffer buffer = decoder.decode(ByteBuffer.wrap(validBytes));
            System.out.println(Arrays.toString(buffer.array()));

            buffer = decoder.decode(ByteBuffer.wrap(invalidBytes));
            System.out.println(Arrays.toString(buffer.array()));
        } catch (CharacterCodingException e) {
            System.err.println("The information contains a non ASCII character(s).");
            e.printStackTrace();
        }
    }
}