Answer:
No. Rounding only affects the characters, not the value in the variable.value provides data when format()
creates a string of characters, but value itself is not changed.
value provides data when format()
creates a string of characters, but value itself is not changed.
import java.text.*;
class IODemoWrapper
{
public static void main ( String[] args )
{
Integer i = new Integer( 7654321 );
Double d = new Double ( 11000.0008 );
DecimalFormat numform = new DecimalFormat();
System.out.println( "integer = " + numform.format(i) + " double = " + numform.format(d) );
}
}
Recall (from the end of chapter 9C)
that a wrapper class defines objects
that each hold a primitive value.
For example, objects of class Integer
each hold one int and some methods for manipulating ints.
A wrapper object may be used as data for format().
The output of the program is (for a computer in the US):
integer = 7,654,321 double = 11,000.001
Again, the locale of your computer will affect the format. Also, notice that the output for the double is rounded.
Do you suspect that the format method can be used with any numeric type?