Example

public static void main (String[] args){
double x = 3.1;
int i = (int)x;
System.out.println(i);
}

Solution
Change the underlying data type to be lower precision.

public static void main (String[] args){
int i = 3;
System.out.println(i);
}

Solution
Update the calculation to operate on the higher precision data type.

public static void main (String[] args){
double x = 3.1;
System.out.println( x );
}