如何使用Java处理多字节Unicode字符

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

1. ??\u?????Unicode??:

public class Main {
    public static void main(String[] args) {
        String str = "??, ??!"; // ??,??!
        System.out.println(str);
    }
}

2. ??char??????Unicode??:

public class Main {
    public static void main(String[] args) {
        char ch1 = '?'; // ?
        char ch2 = '?'; // ?
        System.out.println("" + ch1 + ch2);
    }
}

3. ??String?????????????????:

public class Main {
    public static void main(String[] args) {
        byte[] bytes = new byte[]{(byte) 0xE4, (byte) 0xBD, (byte) 0xA0, (byte) 0xE5, (byte) 0xA5, (byte) 0xBD}; // ???UTF-8??
        try {
            String str = new String(bytes, "UTF-8");
            System.out.println(str);
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
    }
}

4. ??String??getBytes()?????????????:

public class Main {
    public static void main(String[] args) {
        String str = "??";
        try {
            byte[] bytes = str.getBytes("UTF-8");
            for (byte b : bytes) {
                System.out.print(String.format("X ", b));
            }
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
    }
}

5. ??StringBuilder?StringBuffer???????????Unicode??????:

public class Main {
    public static void main(String[] args) {
        StringBuilder sb = new StringBuilder();
        sb.appendCodePoint(0x4F60); // ?
        sb.appendCodePoint(0x597D); // ?
        System.out.println(sb.toString());
    }
}

??,Java????Unicode???,???????Unicode?????????????????????????(?UTF-8)???