padding longs

Posted on 2012-04-05
Last Modified: 2012-04-05
I am doing some math using longs which will yield numbers like 5, 10, 20, etc
but I always need to pad the result to be 3 digits.
What's the best way to do that?
Question by:dpalyca755
  • 3
  • 3
LVL 14

Assisted Solution

CPColin earned 334 total points
ID: 37814127
Using zeros in a DecimalFormat will work:

new DecimalFormat("000").format(x);

Open in new window

LVL 23

Assisted Solution

wdosanjos earned 166 total points
ID: 37814135
Use the DecimalFormat class.  Here is an example:
import java.text.*;

public class Test
    public static void main(String args[])
        DecimalFormat formatter = new DecimalFormat("000");
        long nbr = 50;

        String fmt_nbr = formatter.format(nbr);


Open in new window


Author Comment

ID: 37814190
Can I use the String Format method to do so?
What is the syntax if do so?
let's say the 5 I referenced earlier is stored in the variable myString.
Networking for the Cloud Era

Join Microsoft and Riverbed for a discussion and demonstration of enhancements to SteelConnect:
-One-click orchestration and cloud connectivity in Azure environments
-Tight integration of SD-WAN and WAN optimization capabilities
-Scalability and resiliency equal to a data center

LVL 14

Accepted Solution

CPColin earned 334 total points
ID: 37814211
Assuming you have a long, it would be something like this:

String.format("%03d", myLong);

Open in new window

The "0" means "pad with zeros," the "3" means "make the output three characters wide," and the "d" means "output a number."

Author Comment

ID: 37814296
I can't compile that for some reason.
I tried that exact line too.
What am I doing wrong?

Code Snippet:
long c = 5;
String pad2 = String.format("%03d", c);        
Error: cannot resolve symbol
symbol  : method format (java.lang.String,long)
location: class java.lang.String
             String pad2 = String.format("%03d", c);
1 error
LVL 14

Expert Comment

ID: 37814319
I've only seen that happen when using a version of Java older than 1.5 or when I've told the compiler to pretend like its from an old version of Java. Do you know if that's happening?

Author Comment

ID: 37814330
Yup....I was accidentally pointing to an older version.
I fixed it.  Works now.

Featured Post

Free Tool: ZipGrep

ZipGrep is a utility that can list and search zip (.war, .ear, .jar, etc) archives for text patterns, without the need to extract the archive's contents.

One of a set of tools we're offering as a way to say 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

Suggested Solutions

Title # Comments Views Activity
Maven Project: Hibernate Dependencies Conflict 10 38
fibonacci ten numbers 4 45
login jsp example 24 65
jboss wildfly 10.1 10 228
Java functions are among the best things for programmers to work with as Java sites can be very easy to read and prepare. Java especially simplifies many processes in the coding industry as it helps integrate many forms of technology and different d…
In this post we will learn how to connect and configure Android Device (Smartphone etc.) with Android Studio. After that we will run a simple Hello World Program.
Viewers learn about the third conditional statement “else if” and use it in an example program. Then additional information about conditional statements is provided, covering the topic thoroughly. Viewers learn about the third conditional statement …
Viewers will learn how to properly install Eclipse with the necessary JDK, and will take a look at an introductory Java program. Download Eclipse installation zip file: Extract files from zip file: Download and install JDK 8: Open Eclipse and …

856 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