How does double to int cast work in Java

Question

I am new to Java, and wondering how does double to int cast work ? I understand that it\'s simple for long to int by taking the low 32 bits, but what about double (64 bits)

Answer 1

Java truncates its value if you use (int) cast, as you may notice:

    double d = 2.4d;
    int i = (int) d;
    System.out.println(i);
    d = 2.6;
    i = (int) d;
    System.out.println(i);

Output:

2
2

Unless you use Math.round, Math.ceil, Math.floor...