How can I stop Java from shortening large double?

Question

Let's suppose we have the following code:

System.out.println(String.valueOf(100000000000.0));

Now the output to that is 1.0E11. But that is not what I want. (Looks bad on a highscore) I want it to output exactly 100000000000.0. Is there a way to do that?

Answer 1

Format it appropriately. For example:

System.out.printf("%.1f", 1654621658874684.0);

Be aware that double is not infinitely precise. It has a precision of about 15 to 17 decimal digits. If you need floating-point numbers with arbitrary precision, use BigDecimal instead of double.

Or you could use String.format():

System.out.println(String.format("%.0f", 1654621658874684.0d));

Answer 2

System.out.printf("Score: %.0f\\n", 1e5); will print 100000 .

Answer 3

Refer to this ... Quest
You can use DecimalFormat to format your value for displaying

Answer 4

对于那些大数字，我认为你应该使用BigDecimal。