Type
The values of the integral types of the Java Virtual Machine are:
For byte, from -128 to 127 (-2^7 to 2^7 - 1), inclusive
For short, from -32768 to 32767 (-2^15 to 2^15 - 1), inclusive
For int, from -2147483648 to 2147483647 (-2^31 to 2^31 - 1), inclusive
For long, from -9223372036854775808 to 9223372036854775807 (-2^63 to 2^63 - 1), inclusive
For char, from 0 to 65535 inclusive
FQA
-
1000 00001 是符号位 -
char为UTF-8编码。2^16，此时没有符号位
