unicode - java的中文到底占几个字节？

Question

查了一大堆，糊里糊涂的。现在知道以下几点：

• java采用unicode编码，占两个字节，编码范围是0x0000到0xFFFF，但一共才65536个数，怎么可能表达世界上所有语言文字呢，于是又冒出来一个增补码，占4个字节，范围是0x100000到0x10FFFF。
  那么现在假设有一个中文，范围超出了65535，那么它到底是怎么编码的，占几个字节，是几个char？

Answer 1

public static void main(String[] args) throws Exception{
    System.out.println("

Answer 2

Usually we will set the encoding format to UTF-8. In Chinese, one Chinese character represents two characters in Java, 3 bytes

    public static void main(String[] args) {
        String str = "测试";
        System.out.println(str.getBytes().length);
    }

Output: 6
For the number of bytes occupied by different encoding formats, please refer to the blog:
The number of bytes occupied by different encoding formats

Answer 3

Three UTF-8
Two GBK