How do I divide so I get a decimal value?

Question

I want to know how to get remainder and quotient in single value in Java.

Example:

3/2 I should get value as 1.5.

If I use the / operator I get only the quotient. If I user the % operator I get only the remainder. How do I get both at a time in the same variable?

Solution 1

quotient = 3 / 2;
remainder = 3 % 2;

// now you have them both

Solution 2

In your example, Java is performing integer arithmetic, rounding off the result of the division.

Based on your question, you would like to perform floating-point arithmetic. To do so, at least one of your terms must be specified as (or converted to) floating-point:

Specifying floating point:

3.0/2
3.0/2.0
3/2.0

Converting to floating point:

int a = 2;
int b = 3;
float q = ((float)a)/b;

or

double q = ((double)a)/b;

(See Java Traps: double and Java Floating-Point Number Intricacies for discussions on float and double)

Solution 3

Check this out: http://download.oracle.com/javase/1,5.0/docs/api/java/math/BigDecimal.html#divideAndRemainder%28java.math.BigDecimal%29

You just need to wrap your int or long variable in a BigDecimal object, then invoke the divideAndRemainder method on it. The returned array will contain the quotient and the remainder (in that order).

Solution 4

Don't worry about it. In your code, just do the separate / and % operations as you mention, even though it might seem like it's inefficient. Let the JIT compiler worry about combining these operations to get both quotient and remainder in a single machine instruction (as far as I recall, it generally does).

Solution 5

int a = 3;
int b = 2;
float c = ((float)a)/b

View more solutions