Java - how to cast Double object to primitive int?

1. Problem description

How to cast Double object to primitive int type?

Double num = 3.14; // original - Double object
int num = 3;       // expected - primitive int

2. Solution with Double.intValue()

We can use Double.intValue() method as it returns primitive int.

Code example: 

Double num = 3.14;
int intValue = num.intValue();
System.out.println(intValue); // 3

Output:

3

3. Solution with casting

1. Cast Double to primitive double
2. Then cast primitive double to primitive int

Code example:

Double num = 3.14;
int intValue = (int) (double) (num);
System.out.println(intValue); // 3

Output:

3

Merged questions

1. Java - cast big Double to small integer
2. Java - convert Double object to primitive int
3. How to convert big Double to primitive int type in java?