?
Solved

How to show + sign in scientific notation.

Posted on 2004-09-05
4
Medium Priority
?
680 Views
Last Modified: 2008-02-01
I want to convert an integer number into scientific number format with a plus sign after E.
e.g. I want to print 5 as .50000E+01 . Is this possible in Java. I have given below the code snippet I used in my program but with that it doesn't show a + sign. Can anybody help to solve this problem ?

int myNumber = 5;
String myFormat = ".00000E00";
NumberFormat nf = NumberFormat.getInstance();
DecimalFormat df = (DecimalFormat)nf;
df.applyPattern(myFormat);
System.out.println( "[" + myNumber +"]: " + df.format(myNumber) );
0
Comment
Question by:Emilda
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
  • 2
4 Comments
 
LVL 16

Accepted Solution

by:
gnoon earned 200 total points
ID: 11988154
Try this

        int myNumber = 5;
        String myFormat = ".00000E00";
        DecimalFormat df = new DecimalFormat(myFormat);
        df.setPositivePrefix("+");
        System.out.println( "[" + myNumber +"]: " + df.format(myNumber) );

It prints out:     [5]: +.50000E+01
0
 

Author Comment

by:Emilda
ID: 11993790
Thanks, but it printed a + in the beginning as well. Is there any way to get rid of that.
0
 
LVL 16

Expert Comment

by:gnoon
ID: 11994969

        int myNumber = 5;
        String myFormat = ".00000E00";
        DecimalFormat df = new DecimalFormat(myFormat);
        df.setPositivePrefix("+");

        String notation = df.format(myNumber);
        notation = notation.startsWith("+") ? notation.substring(1) : notation ;

        System.out.println( "[" + myNumber +"]: " + notation );

0
 

Author Comment

by:Emilda
ID: 12003997
:-), actually I was wondering whether there is any API available for formatting rather than a workaround.

Thanks for helping.
0

Featured Post

Free Tool: Port Scanner

Check which ports are open to the outside world. Helps make sure that your firewall rules are working as intended.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

In this post we will learn different types of Android Layout and some basics of an Android App.
Basic understanding on "OO- Object Orientation" is needed for designing a logical solution to solve a problem. Basic OOAD is a prerequisite for a coder to ensure that they follow the basic design of OO. This would help developers to understand the b…
Viewers will learn about arithmetic and Boolean expressions in Java and the logical operators used to create Boolean expressions. We will cover the symbols used for arithmetic expressions and define each logical operator and how to use them in Boole…
The viewer will learn how to implement Singleton Design Pattern in Java.
Suggested Courses
Course of the Month11 days, 3 hours left to enroll

770 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question