Java - Different between two timeMillis

Question

How can i determine different between two timeMillis in minutes ?

my pseudo code is :

long a = System.currentTimeMillis();
long b = MyClass.getPreviusTimeMillis();

double minutes = a - b = ?

Answer 1

使用 Java 5 及更高版本中的TimeUnit 枚举。

long minutes = TimeUnit.MILLISECONDS.toMinutes(a - b);

Answer 2

分钟差： double d = (a - b)/60000.0