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System.out.println(Charset.defaultCharset());//»ñÈ¡ideĬÈϱàÂëÀàÐÍ
String s = new String("China".getBytes());
byte[] b = s.getBytes();
System.out.println("" + b.length);

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System.out.println(Charset.defaultCharset());
String s;
try {
  s = new String("Öйú".getBytes(),"GBK");
  byte[] b = s.getBytes();
  System.out.println("" + b.length);
 } catch (UnsupportedEncodingException e) {
  e.printStackTrace();
}

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