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Java > Java SE, EE, ME > java > text > DecimalFormat

java.text
Class DecimalFormat

java.lang.Object
  extended by java.text.Format
      extended by java.text.NumberFormat
          extended by java.text.DecimalFormat
All Implemented Interfaces:
Serializable, Cloneable
See Also:
Top Examples, Source Code, Character.digit, ROUND_HALF_EVEN, DecimalFormatSymbols, ParsePosition 
public void applyLocalizedPattern(String pattern)
See Also:
IllegalArgumentException, NullPointerException
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public void applyPattern(String pattern)
See Also:
IllegalArgumentException, NullPointerException
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public Object clone()
See Also:
Cloneable, NumberFormat
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public DecimalFormat()
See Also:
NumberFormat.getPercentInstance(), NumberFormat.getCurrencyInstance(), NumberFormat.getNumberInstance(), NumberFormat.getInstance()
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[1422]Format decimal number
By tsatsulin_v_n { at } yahoo { dot } com on 2005/05/12 02:15:23  Rate
import java.text.*; 
  
  
 public class DecFtDemo  {  
   public static void main ( String f [  ]  )   {  
     DecimalFormat df = new DecimalFormat (  ) ; 
     System.out.println (  df.format (  -4.3279 )   ) ; 
     System.out.println (  df.format (  2174534.3279 )   ) ; 
    }  
  }  
  
  
 Result: 
 -4.328 
 2,174,534.328 
 
public DecimalFormat(String pattern)
See Also:
NumberFormat.getPercentInstance(), NumberFormat.getCurrencyInstance(), NumberFormat.getNumberInstance(), NumberFormat.getInstance(), IllegalArgumentException, NullPointerException
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[34]Different formats of decimal number
By Anonymous on 2005/03/08 14:24:43  Rate
DecimalFormat format = new DecimalFormat ( "#,##0.0000" ) ; 
 FieldPosition f = new FieldPosition ( 0 ) ; 
 StringBuffer s = new StringBuffer (  ) ; 
 format.format ( myDouble, s, f ) ;

[546]_
By Checker on 2004/12/16 21:36:56  Rate
// Use the symbol ' to quote literal symbols  
  
  
 NumberFormat f = new DecimalFormat ( "'#'#" ) ; 
 s = f.format ( -1234.5678 ) ; // -#1235 
 f = new DecimalFormat ( "'AEF'#" ) ; 
 s = f.format ( -1234.567 ) ; // -AEF1235 
 

[714]_
By Anonymous on 2005/02/23 00:57:01  Rate
DecimalFormat df = new DecimalFormat (  ) ; 
 df.setMaximumFractionDigits ( 2 ) ;  
 df.setMinimumFractionDigits ( 2 ) ; 
 df.setDecimalSeparatorAlwaysShown ( true ) ; 
 

[1332]Do not call the DecimalFormat constructor directly
By Bruce Ingalls http://emacro { dot } sourceforge { dot } net/ on 2005/03/08 14:35:19  Rate
The Java API docs for some time, have recommended against calling the DecimalFormat constructor directly. Java Docs starting with Tiger aka 1.5 aka 5.0 include a partial example. 
 
public DecimalFormat(String pattern,
                     DecimalFormatSymbols symbols)
See Also:
NumberFormat.getPercentInstance(), NumberFormat.getCurrencyInstance(), NumberFormat.getNumberInstance(), NumberFormat.getInstance(), IllegalArgumentException, NullPointerException
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[1889]Convert number to string with preceding zeros
By Anonymous on 2007/06/11 22:34:03  Rate
//Convert to 7 digit strings 
 DecimalFormat myFormatter = new DecimalFormat ( "0000000" ) ; 
 String output = myFormatter.format ( 1 ) ;
public boolean equals(Object obj)
See Also:
Hashtable, Object.hashCode(), NumberFormat
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public StringBuffer format(double number,
                           StringBuffer result,
                           FieldPosition fieldPosition)
See Also:
NumberFormat
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public final StringBuffer format(Object number,
                                 StringBuffer toAppendTo,
                                 FieldPosition pos)
See Also:
NullPointerException, IllegalArgumentException, NumberFormat, Number
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public StringBuffer format(long number,
                           StringBuffer result,
                           FieldPosition fieldPosition)
See Also:
NumberFormat
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public AttributedCharacterIterator formatToCharacterIterator(Object obj)
See Also:
IllegalArgumentException, NullPointerException, Format
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public Currency getCurrency()
See Also:
NumberFormat
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public DecimalFormatSymbols getDecimalFormatSymbols()
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public int getGroupingSize()
See Also:
DecimalFormatSymbols.getGroupingSeparator(), NumberFormat.isGroupingUsed(), setGroupingSize(int)
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public int getMaximumFractionDigits()
See Also:
setMaximumFractionDigits(int), NumberFormat
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public int getMaximumIntegerDigits()
See Also:
setMaximumIntegerDigits(int), NumberFormat
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public int getMinimumFractionDigits()
See Also:
setMinimumFractionDigits(int), NumberFormat
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public int getMinimumIntegerDigits()
See Also:
setMinimumIntegerDigits(int), NumberFormat
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public int getMultiplier()
See Also:
setMultiplier(int)
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public String getNegativePrefix()
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public String getNegativeSuffix()
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public String getPositivePrefix()
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public String getPositiveSuffix()
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public int hashCode()
See Also:
Hashtable, Object.equals(java.lang.Object), NumberFormat
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public boolean isDecimalSeparatorAlwaysShown()
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public boolean isParseBigDecimal()
See Also:
setParseBigDecimal(boolean), parse(java.lang.String, java.text.ParsePosition)
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public Number parse(String text,
                    ParsePosition pos)
See Also:
Format.parseObject(java.lang.String, java.text.ParsePosition), NumberFormat.isParseIntegerOnly(), NullPointerException, BigDecimal.BigDecimal(String), isParseBigDecimal()
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public void setCurrency(Currency currency)
See Also:
NullPointerException, NumberFormat
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public void setDecimalFormatSymbols(DecimalFormatSymbols newSymbols)
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public void setDecimalSeparatorAlwaysShown(boolean newValue)
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public void setGroupingSize(int newValue)
See Also:
DecimalFormatSymbols.setGroupingSeparator(char), NumberFormat.setGroupingUsed(boolean), getGroupingSize()
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public void setMaximumFractionDigits(int newValue)
See Also:
NumberFormat
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[789]Format a double in a nice percent format
By Jeff Hoeft on 2004/05/20 20:10:39  Rate
  /* 
    * This function takes a number in double format and returns that number as a  
    * string in a nice percent format with 4 places to the left of the decimal.  
    */ 
   public String getPercentageValue ( double d )   {  
  
  
     NumberFormat nf = NumberFormat.getPercentInstance ( Locale.US ) ; 
     nf.setMaximumFractionDigits ( 4 ) ; 
  
  
     return nf.format ( d ) ; 
    }  
 
public void setMaximumIntegerDigits(int newValue)
See Also:
NumberFormat
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public void setMinimumFractionDigits(int newValue)
See Also:
NumberFormat
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public void setMinimumIntegerDigits(int newValue)
See Also:
NumberFormat
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public void setMultiplier(int newValue)
See Also:
getMultiplier()
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public void setNegativePrefix(String newValue)
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public void setNegativeSuffix(String newValue)
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public void setParseBigDecimal(boolean newValue)
See Also:
isParseBigDecimal(), parse(java.lang.String, java.text.ParsePosition)
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public void setPositivePrefix(String newValue)
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public void setPositiveSuffix(String newValue)
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public String toLocalizedPattern()
See Also:
applyPattern(java.lang.String)
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public String toPattern()
See Also:
applyPattern(java.lang.String)
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