Converting a double to long in java.

Question:

How to convert a double to long in java?

Answer:

1) Casting
2) Math.round()
3) Double.longValue()

Code:

public class Example {
 
  public static void main(String args[]){
    double d1 = 1234.56;
    System.out.println("d1: " + d1);
 
    // Casting
    long l1 = (long)d1;
 
    // Rounding
    long l2 = Math.round(d1);
    System.out.println("l1: " + l1);
    System.out.println("l2: " + l2);
 
    // Double.longValue()
    Double d2 = new Double(d1);
    long l3 = d2.longValue();
    System.out.println("l3: " + l3);
  }
}

Output:

$ java Example
d1: 1234.56
l1: 1234
l2: 1235
l3: 1234