Examples of java.text.NumberFormat

java.text.NumberFormat
NumberFormat is the abstract base class for all number formats. This class provides the interface for formatting and parsing numbers. NumberFormat also provides methods for determining which locales have number formats, and what their names are.
NumberFormat helps you to format and parse numbers for any locale. Your code can be completely independent of the locale conventions for decimal points, thousands-separators, or even the particular decimal digits used, or whether the number format is even decimal.
To format a number for the current Locale, use one of the factory class methods:
```
 myString = NumberFormat.getInstance().format(myNumber); 
```
If you are formatting multiple numbers, it is more efficient to get the format and use it multiple times so that the system doesn't have to fetch the information about the local language and country conventions multiple times.
```
 NumberFormat nf = NumberFormat.getInstance(); for (int i = 0; i < myNumber.length; ++i) { output.println(nf.format(myNumber[i]) + "; "); } 
```
To format a number for a different Locale, specify it in the call to getInstance.
```
 NumberFormat nf = NumberFormat.getInstance(Locale.FRENCH); 
```
You can also use a NumberFormat to parse numbers:
```
 myNumber = nf.parse(myString); 
```
Use getInstance or getNumberInstance to get the normal number format. Use getIntegerInstance to get an integer number format. Use getCurrencyInstance to get the currency number format. And use getPercentInstance to get a format for displaying percentages. With this format, a fraction like 0.53 is displayed as 53%.
You can also control the display of numbers with such methods as setMinimumFractionDigits. If you want even more control over the format or parsing, or want to give your users more control, you can try casting the NumberFormat you get from the factory methods to a DecimalFormat. This will work for the vast majority of locales; just remember to put it in a try block in case you encounter an unusual one.
NumberFormat and DecimalFormat are designed such that some controls work for formatting and others work for parsing. The following is the detailed description for each these control methods,
setParseIntegerOnly : only affects parsing, e.g. if true, "3456.78" -> 3456 (and leaves the parse position just after index 6) if false, "3456.78" -> 3456.78 (and leaves the parse position just after index 8) This is independent of formatting. If you want to not show a decimal point where there might be no digits after the decimal point, use setDecimalSeparatorAlwaysShown.
setDecimalSeparatorAlwaysShown : only affects formatting, and only where there might be no digits after the decimal point, such as with a pattern like "#,##0.##", e.g., if true, 3456.00 -> "3,456." if false, 3456.00 -> "3456" This is independent of parsing. If you want parsing to stop at the decimal point, use setParseIntegerOnly.
You can also use forms of the parse and format methods with ParsePosition and FieldPosition to allow you to:
- progressively parse through pieces of a string
- align the decimal point and other areas
For example, you can align numbers in two ways:
1. If you are using a monospaced font with spacing for alignment, you can pass the FieldPosition in your format call, with field = INTEGER_FIELD. On output, getEndIndex will be set to the offset between the last character of the integer and the decimal. Add (desiredSpaceCount - getEndIndex) spaces at the front of the string.
2. If you are using proportional fonts, instead of padding with spaces, measure the width of the string in pixels from the start to getEndIndex. Then move the pen by (desiredPixelWidth - widthToAlignmentPoint) before drawing the text. It also works where there is no decimal, but possibly additional characters at the end, e.g., with parentheses in negative numbers: "(12)" for -12.
Synchronization

Number formats are generally not synchronized. It is recommended to create separate format instances for each thread. If multiple threads access a format concurrently, it must be synchronized externally. @see DecimalFormat @see ChoiceFormat @version 1.74, 11/17/05 @author Mark Davis @author Helena Shih

    public double getModularity() {
        return modularity;
    }


    public String getReport() {
        NumberFormat f = new DecimalFormat("#0.000");


        String report = "<HTML> <BODY> <h1>Modularity Report </h1> "
                + "<hr>"
                + "<h2> Parameters: </h2>"
                + "Randomize:  " + (isRandomized ? "On" : "Off") + "<br>"
                + "<br> <h2> Results: </h2>"
                + "Modularity: " + f.format(modularity) + "<br>"
                + "Number of Communities: " + structure.communities.size()
                + "<br /><br />" + "<h2> Algorithm: </h2>"
                + "Vincent D Blondel, Jean-Loup Guillaume, Renaud Lambiotte, Etienne Lefebvre, <i>Fast unfolding of communities in large networks</i>, in Journal of Statistical Mechanics: Theory and Experiment 2008 (10), P1000<br />"
                + "</BODY> </HTML>";

View Full Code Here

package com.sun.ebank.web;
import java.text.NumberFormat;
import java.text.DecimalFormat;
public final class Currency extends Object {
   public static String format(double amount){
      NumberFormat nf = NumberFormat.getCurrencyInstance();
      DecimalFormat df = (DecimalFormat)nf;
      df.setMinimumFractionDigits(2);
      df.setMaximumFractionDigits(2);
      df.setDecimalSeparatorAlwaysShown(true);
      String pattern = "$###,###.00";

View Full Code Here

  ArrayList alist, Date timestamp){


    p2.removeAll();
    createPanelTwoActLabels();
    String custIDs=null;
    NumberFormat numFormat = NumberFormat.getNumberInstance(currentLocale);


    if(alist.size() != 0) {
      custIDs = alist.toString();
      this.cust = new JTextField(custIDs);
    } else {
      this.cust = new JTextField();
    }


    this.descrip = new JTextField(this.desc);
    this.type = new JTextField(type);
 
    //Internationalize date 
    String viewtime = DateFormat.getDateInstance().format(timestamp); 
    this.time = new JTextField(viewtime);


    //Internationalize numbers
    Double baldub = new Double(bal);
    String balstring = numFormat.format(baldub);
    this.bal = new JTextField(balstring);


    Double creditdub = new Double(creditline);
    String creditstring = numFormat.format(creditdub);
    this.credit = new JTextField(creditstring);


    Double begbaldub = new Double(begbalance);
    String begbalstring = numFormat.format(begbaldub);
    this.begbal = new JTextField(begbalstring);
    //Listen for Return action event
    this.begbal.addActionListener(ehandle);


    if(readonly == false) {

View Full Code Here

    env.add(new Property("Jetty Home", System.getProperty("jetty.home")));
    env.add(new Property("Java Runtime", System.getProperty("java.runtime.name") + " " + System.getProperty("java.runtime.version")));
    
    Runtime r = Runtime.getRuntime();
    long usedMemory = r.totalMemory() - r.freeMemory();
    NumberFormat f = DecimalFormat.getPercentInstance();
    f.setMinimumFractionDigits(1);
    String percentage = f.format(((float) usedMemory) / r.maxMemory());
    env.add(new Property("Memory", (usedMemory >> 20) + " Mb of " + (r.maxMemory() >> 20) + " Mb (" +
        percentage + ")"));
    
    env.add(new Property("Available processors", ManagementFactory.getOperatingSystemMXBean().getAvailableProcessors()));
    StringBuilder sb = new StringBuilder();

View Full Code Here

   public void setAmount(double a) {
      amount = a;
   }


   public String getFormat() {
        NumberFormat nf = NumberFormat.getCurrencyInstance(locale);
        return nf.format(amount);
   }

View Full Code Here

        }
        catch(NumberFormatException ex)
        {
            try
            {
                NumberFormat numberFormat = NumberFormat.getInstance(locale);
                val = numberFormat.parse(str).doubleValue();
            }
            catch(ParseException e)
            {
                throw new NumberFormatException(e.getMessage());
            }

View Full Code Here

        }
        catch(NumberFormatException ex)
        {
            try
            {
                NumberFormat numberFormat = NumberFormat.getInstance(locale);
                val = numberFormat.parse(str).intValue();
            }
            catch(ParseException e)
            {
                throw new NumberFormatException(e.getMessage());
            }

View Full Code Here

   public void setAmount(double a) {
      amount = a;
   }


   public String getFormat() {
        NumberFormat nf = NumberFormat.getCurrencyInstance(locale);
        return nf.format(amount);
   }

View Full Code Here

                0, 0));
        return button;
    }


    private String formatPoint(Point2D p) {
        NumberFormat formatter = getNumberFormatter();
        return "" + formatter.format(p.getX()) + ", " + formatter.format(p.getY());
    }

View Full Code Here

            }
        }
    }


    private static NumberFormat getNumberFormatter() {
        NumberFormat formatter = NumberFormat.getInstance(Locale.ENGLISH);
        formatter.setMinimumFractionDigits(2);
        formatter.setMaximumFractionDigits(2);
        return formatter;
    }

View Full Code Here

0 1 2 3 4 5 6 7 8 9

TOP

Related Classes of java.text.NumberFormat

Account

azkaban.common.web.GuiUtils

cc.mallet.util.MVNormal

com.github.neuralnetworks.util.Util

com.google.gwt.soyc.MakeTopLevelHtmlForPerm

com.habitsoft.kiyaa.server.ServerLocalizedParser

com.ibm.commons.util.Converter

com.ibm.icu.dev.test.format.RbnfTest

com.jidesoft.converter.NumberConverter

com.meapsoft.composers.HeadBangComposer

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.

Examples of java.text.NumberFormat

Synchronization

Related Classes of java.text.NumberFormat