Java Date输出错误。 为什么？

Question

I'am playing with Java Date and can't understand this:

Date myBirth = new Date(1991,01,21);
Log.d("DATE: ", "" + myBirth);

Here I initialized Date object. Why I get this output?

DEBUG/DATE:(31693): Sat Feb 21 00:00:00 EET 3891

Answer 1

From the Date docs :

• A year y is represented by the integer y - 1900.
• A month is represented by an integer from 0 to 11; 0 is January, 1 is February, and so forth; thus 11 is December.

Answer 2

Quoting from the Javadoc of this deprecated constructor of Date:

Parameters:
    year - the year **minus 1900**.
    month - the month between 0-11.
    date - the day of the month between 1-31.

So the output is what you ask, but not what you want.