Java Learning notes-logical operators, bitwise operators, extension operators

Logical operators:

Logic and:&&

Logical OR: | |

Logical non-:!

Note: Logic and logic or the use of short-circuit methods. From left to right, if the determined value is no longer evaluated.

Eg:boolean c =1>2 && 2> (3/0); && does not report abnormal errors, stating that no 3/0 is executed;

Bitwise operators:

~ Reverse: 0 to 1 1 to 0

& Bitwise AND: 00 to 0, 01 to 0, 10 to 0, 11 to 1

| bitwise OR: 00 to 0, 01 to 1, 10 to 1, 11 to 1

^ Bitwise XOR: 00 to 0, 01 to 1, 10 to 1, 11 to 0 (same as 0, 1)

<< left shift operator: Shift left one is equivalent to multiply by 2.

>> Right shift operator: Move right one is equivalent to 2 fetch. (It is important to note that exams may be multiplied by 4 for the fastest or the most efficient by 4)

Expansion operators:

int A;

A + = 5; Equivalent to a = a +5;

a-=5; Equivalent to a = a-5;

a *=5; Equivalent to a = a*5;

a/=5; Equivalent to a = A/5;

A%=5//equivalent to a =a%5;

Java Learning notes-logical operators, bitwise operators, extension operators