Converting double to int [duplicate]

Answer 1

Also you can use Math.floor().

public class Example {
    public static void main(String args[]) { 
        double i = 2.9;

        System.out.println((int)(i));
        System.out.println((int)Math.floor(i));
        System.out.println((int)(-i));
        System.out.println((int)Math.floor(-i));        
    }
}

output:

2
2
-2
-3

Answer 2

You can turn any object from one compatible type to another by using 'type-casting'. You use this syntax:

double i = 2.0;
int i2 =  (int) i;

Notice how I just put (int) before the variable i? This basically says 'hey, try to make i an int, if you can'. Since java can easily convert a float to an int, it will.

Answer 3

just cast double to (int)

double i = 2.0;
int i2 =  (int) i;

Answer 4

You could either cast the double to an int:

double i = 2.0
int i2 = (int) i;

or, you could round the number to the nearest whole number, then cast it to an int, just in case you would like to round:

double i = 2.2
int i2 = (int) Math.round(i);

or, you could use

double i = 2.0
int i2 = Integer.parseInt(String.valueOf(i));

About best, though, the first option would be best for the least code, and the second would be better if you would like to get the closest integer to the double.