Java Learning 02 (first time)

Consolidating the foundation:

Byte 1 bytes-128 to 127 = 2^ (bytes *8-1), Transition 2 decimal, 01111111 (negative 127) to 11111111 (positive 127), presence plus or minus 0 (00000000), positive zero reserved, negative zero complement, definition 10000000 to 128

Char can automatically be converted to an integer corresponding to the ASCII code, if it is a Chinese character, automatically by Unicode, for example ' A ' = 65, ' Medium ' =20013

int a=56;
int b=a++;
System.out.println (a);
System.out.println (b);

That's right:

57

56

Compilation is the overall compilation, no specified order, then by the submission process, b=a++, belongs to the Post + +, equals {b=a,a=a+1}-first assignment, and then self-increment

So if the output order is changed, the final result is not affected

int a=56;
int b=a++;
System.out.println (b);
System.out.println (a);

That's right:

56

57

Include Order:

int a=56;

System.out.println (a);

int b=a++;
System.out.println (b);

That's right:

56

56

Java Learning 02 (first time)