Java: An Introduction to Problem Solving and Programming, 8th Edition

Syntax:

DecimalFormat Decimal_Format_Object_Name= DecimalFormat(Pattern);

Example:

DecimalFormat formattingObject = new DecimalFormat("00.000");

You then can use the method format to convert a value of type double to a corresponding numeral String, as follows:

Syntax:

Decimal_Format_Object_Name.format(Double_Expression)

The method returns a string that corresponds to Double_Expression.

Example:

System.out.println(formattingObject.format(12.3456));

If the object formattingObject is created with the pattern "00.000", as in our previous example, the output produced by the foregoing println statement is 12.346.

Note that the method format returns a string that is an object of the class StringBuffer, not String. StringBuffer is similar to String ...