What does division by 1e9d mean?

Question

This is the snippet:

String myTime = someTime / 1e9d + ",";

someTime is derived by using System.nanoTime(). What does 1e9d do here?

Answer 1

1e9 means 10^9
2d means 2 as double

e.g.

• sysout 1e9 => 1.0E9
• sysout 10e9 => 1.0E10

See also the Floating-Point Literals section of The Java™ Tutorials.