why I can not get double value in java?

Question

I have a problem. My output is:

8.7E7

I want to set it to 87000000. What should I do?

public class Test {
    /**
     * @param args
     */

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        double num = 87000000;

        System.out.println("num = " + num);
    }
}

https://docs.oracle.com/javase/7/docs/api/java/text/NumberFormat.html — BevynQ, Jun 14 '16 at 05:57

Krzysztof Krasoń · Accepted Answer · 2016-06-14T06:09:54.163

1

Do:

System.out.printf("num = %.0f", num);

This will print the double value with zero decimal places. See https://docs.oracle.com/javase/7/docs/api/java/util/Formatter.html for details on the formatting in printf.

If you want to use the String somewhere then use:

    String msg = String.format("num = %.0f", num);

edited Jun 14 '16 at 06:09

answered Jun 14 '16 at 05:57

Krzysztof Krasoń

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And then I want to output in Toast like Toast.makeText(getBaseContext(), num, Toast.LENGTH_LONG).show(); printf cannot use in it – Ahmad Budi U Jun 14 '16 at 06:06
@AhmadBudiU Added info about `String.format` – Krzysztof Krasoń Jun 14 '16 at 06:10
Thanks sir, that's work (y) – Ahmad Budi U Jun 14 '16 at 06:16

score 0 · Answer 2 · answered Jun 14 '16 at 06:06

public class Test {
/**
* @param args
*/
public static void main(String[] args) {
    // TODO Auto-generated method stub
     double num = 87000000;

     System.out.printf("num = %.0f \n", num);
}}

Just change your System.out.println() to System.out.printf() and use the format specifier. The "\n” adds a new line.

For more details on how that works, just visit this link.

http://www.alvinalexander.com/programming/printf-format-cheat-sheet

why I can not get double value in java?

2 Answers2