Does double data type operands can not be used with bit wise operators in Java ?

Question

i m learning java language. i was taught that bit wise operators acts with long, int, short, char and byte data types but they said nothing about the double data type, does double data type can not be use with bit wise operators, then why it can not be used with bit wise operators. please somebody answer

Answer 1

If you have played with ANSI C, you would know you need a register size -- aka a buffer. You push the binary bits back and forth with bitwise and the rules in Java take over so you never have a buffer overflow. Type float and type double use a double register to track the floating point of the decimal value. Bitwise works only with the single register. If a type is smaller than int, the type is promoted to int before the operator performs a bit shift.



Don't assume you have 32 slots unless your initial value is a negative int. For example, -4 is 1111 1111 1111 1111 1111 1111 1111 1100. But +4 is 1100, the pre-pended zeros are dropped.

Answer 2

Java Bit Shift

Answer 3

No, they can't be used. The compiler will complain: "The operator << is undefined for the argument type(s) double, int".



I assume this is to do the problem of the stuff after the decimal points, given floats also won't allow bitshifting operations to be performed on them.

Answer 4

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Answer 5

'Double' is a 8 byte double precision floating point. It gives precision upto 15 digits.therefore a float is sufficient for normal uses. Double is used for large numbers for high precision such as for astronomy or sub atomic physics.