Javaのcharは何バイトですか?

public class Test { public static void main(String[] args) { String str= "中"; char x ='中'; byte[] bytes=null; byte[] bytes1=null; try { bytes = str.getBytes("utf-8"); bytes1 = charToByte(x); } catch (UnsupportedEncodingException e) { // TODO Auto-generated catch block e.printStackTrace(); } System.out.println("bytes 大小："+bytes.length); System.out.println("bytes1大小："+bytes1.length); } public static byte[] charToByte(char c) { byte[] b = new byte[2]; b[0] = (byte) ((c & 0xFF00) >> 8); b[1] = (byte) (c & 0xFF); return b; } }

bytes 大小：3 bytes1大小：2