Java Operator Precedence

Question 1

What’s of the top (15th) precedence?

Answer 1

() - Parentheses
[] - Array subscript
· - Member selection

Question 2

What’s of the last (1st) precedence?

Answer 2

=       -Assignment
\+=     -Addition Assignment
-=      -Subtraction Assignment
*=      -Multiplication Assignment 
/=      -Division Assignment
%=    -Modulus Assignment

Question 3

What does Precedence even mean?

Answer 3

it’s the condition of being more important that something; priority

in this case, the higher the #, the higher it is in priority

Question 4

14th precedence?

Answer 4

? : -conditional (ternary)

Question 5

13th precedence?

Answer 5

\++       -unary Pre-Increment
--         -unary Pre-Decrement
\+         -unary Plus
-          -unary Minus
!          -unary Logical Negation
~         -unary Bitwise Complement
(type)  -unary Type Cast

Question 6

12th precedence?

Answer 6

• -Multiplication
  / -Division
  % -Modulus

Question 7

11th precedence?

Answer 7

+ -Addition

- -Subtraction

Question 8

10th precedence?

Answer 8

&laquo_space; -bitwise Left Shift
» -bitwise Right Shift w/Sign Extension
»> -bitwise Right Shift w/Zero Extension

Question 9

9th precedence?

Answer 9

<       -relational Less than 
<=     -relational Less than or Equal 
>       -relational Greater than
>=     -relational Greater than or Equal
instanceof      -Type comparison (objects only)

Question 10

8th precedence?

Answer 10

==     -relational Is Equal to 
!=      -relational Is Not Equal to

Question 11

7th precedence?

Answer 11

& -bitwise AND

Question 12

6th precedence?

Answer 12

^ -bitwise exclusive OR

Question 13

5th precedence?

Answer 13

-bitwise inclusive OR

Question 14

4th precedence?

Answer 14

&& -logical AND

Question 15

3rd precedence?

Answer 15

|| -logical OR

Question 16

What’s the order for Bitwise operators?

Answer 16

(10th precedence)
&laquo_space; -bitwise Left Shift
» -bitwise Right Shift w/Sign Extension
»> -bitwise Right Shift w/Zero Extension

(7th precedence)
& -bitwise AND

(6th precedence)
^ -bitwise exclusive OR

(5th precedence)
| -bitwise inclusive OR

Question 17

What’s the order for Relational operators?

Answer 17

(9th precedence)
<       -relational Less than 
<=     -relational Less than or Equal 
>       -relational Greater than
>=     -relational Greater than or Equal
instanceof      -Type comparison (objects only)

(8th precedence)
== -relational Is Equal to
!= -relational Is Not Equal to

Question 18

What’s the order for Unary operators?

Answer 18

(14th precedence)
++ -unary Post-Increment
– -unary Post-Decrement

(13th precedence)
\++        -unary Pre-Increment
--          -unary Pre-Decrement
\+          -unary Plus
-           -unary Minus
!           -unary Logical Negation
~          -unary Bitwise Complement
(type)   -unary Type Cast

Question 19

What’s the order for Math operators?

Answer 19

(15th precedence)
() - Parentheses
[] - Array subscript
· - Member selection

(12th precedence)
* -Multiplication
/ -Division
% -Modulus

(11th precedence)
+ -Addition
- -Subtraction

Question 20

(Check for understanding Math) Which one comes first?

• Multiplication
• Division
• Modulus

Answer 20

None of them

It depends on the order from left to right

-b/c they are all within the same precedence, just as + and - have the same precedence as well.

Question 21

What’s the order for Boolean operators?

Answer 21

(13th precedence)
! -unary Logical Negation

(7th precedence)
& -bitwise AND

(6th precedence)
^ -bitwise exclusive OR

(4th precedence)
&& -logical AND

(3rd precedence)
|| -logical OR

Question 22

What makes the 14th, 13th, 2nd, and 1st precedence different from the rest?

Answer 22

Within Java, they operate going from Right to Left instead of Left to Right

This is what we call “Associativity”, whenever we have more than one expression with the same precedence, the order can change.

Ex) “3 + 3 + 3” is Left to Right (13th precedence)
“3 = 3 = 3” is Right to Left (2nd precedence)

Question 23

What is a Bitwise operator used for?

Answer 23

They’re used to manipulate r compare individual bits of a number

(works with char, short, int, etc.)

In use, it works like Booleans, except every 1 = true and 0 = false

Question 24

What is a Unary operator used for?

Answer 24

“Unary” means to have one operands

These operands can be increment (++), decrement (–), negation(!)

Increment and Decrement can be used in a Pre- or a Post- state

Question 25

What is a Ternary Conditional used for?

Answer 25

Ternary meaning three operands

The Ternary Condition acts as a simplified if-then-else statement and requires at least three operands(operations) to work

ex) 
variable = Expression1 ? Expression2: 
// which is the same thing as-
if(Expression1)
    variable = Expression2;
else
    variable = Expression3;

Question 26

What does Associativity mean again?

Answer 26

In this context, it’s the association/order that expressions within the same precedence are executed