JAVA How to remove trailing zeros from a double [d

问题:

This question already has an answer here:

• How to nicely format floating numbers to String without unnecessary decimal 0? 22 answers

For example I need 5.0 to become 5, or 4.3000 to become 4.3.

回答1:

Use DecimalFormat

  double answer = 5.0;
   DecimalFormat df = new DecimalFormat("###.#");
  System.out.println(df.format(answer));

回答2:

You should use DecimalFormat("0.#")

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For 4.3000

Double price = 4.3000;
DecimalFormat format = new DecimalFormat("0.#");
System.out.println(format.format(price));

output is:

4.3

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In case of 5.000 we have

Double price = 5.000;
DecimalFormat format = new DecimalFormat("0.#");
System.out.println(format.format(price));

And the output is:

5

回答3:

Use a DecimalFormat object with a format string of "0.#".