Java basic----> operators and their precedence

One, operator

1) '/' division operator

A) If it is divided by two integers, take only the integer quotient, such as 7/2=3

b) If the number is divided by a floating-point number, the floating-point number is a quotient, such as 7/2f=3.5

2) Self-increment, decrement operator "+ +""--"

A) operands using the self-increment or decrement operator must be integers or floating-point numbers,char and Boolean cannot use "+ +""-- "

3) Comparison operators, note the desirable types of operands of these operators

4) Logical operators &&,&,| | ,!

A) operands of these logical operators must be of type Boolean

b) && and & both represent logic and, but the two operators are different, the former is a short-circuit operator, sometimes omit some of the calculation steps,

5) Bitwise operator

A) & | ~ ^ Bitwise XOR (two values do not simultaneously result 1) << >> >>> unsigned Right shift

b) << left shift, left to move empty partial complement 0

c) >> right SHIFT, signed right SHIFT, if the highest bit is 1, the right part of the blank is shifted 1

If the highest bit is 0, the right part of the blank is shifted 0

d) >>>, right shift, unsigned right shift, whether the change is 0 or 1, the right to move the empty part of the complement 0

e) The operand types that the shift operator applies to are byte, short,int,long, Char

f) A number <<n bit, equivalent to this time multiplied by 2^n; a number >>n , equivalent to this number divided by 2. ^n

Ii. precedence of Operators

Overview: Operators have a certain priority and priority determines the order of execution

If two operators in the same expression have the same precedence, the left-behind operator is executed.

When programming, you should use parentheses to limit the order of operations, so as to avoid errors.

Java basic----> operators and their precedence