以 UTF-8 获取字符串的字节表示

import java.nio.charset.StandardCharsets;
import java.util.Arrays;

public class GetUtf8BytesFromString {

    public static void main(String[] args) {
        String str = "Cyrillic symbol Ы";
        //StandardCharsets is available since Java 1.7
        //for ealier version use Charset.forName("UTF-8");
        byte[] textInUtf8 = str.getBytes(StandardCharsets.UTF_8);

        System.out.println(Arrays.toString(textInUtf8));
    }
}