java中unicode编码怎么实现

?Java?,??????????????Unicode??:

1. ??Unicode????:?Java?,???"\u"????4?16??????Unicode?????,??'A'?Unicode???A???????????????Unicode??:

char ch = 'A';
String unicode = String.format("\\ux", (int) ch);
System.out.println(unicode); // ??:A

2. ??Character????:Java??Character???????????Unicode???????Character??getNumericValue????????Unicode??,???????16????????:

char ch = 'A';
int codePoint = Character.codePointAt(new char[] {ch}, 0);
String unicode = Integer.toHexString(codePoint);
System.out.println(unicode); // ??:41

??????????????Unicode?????,????????????????