Java Reference
In-Depth Information
Display 2.5
The
DecimalFormat
Class
(part 1 of 2)
1
import
java.text.DecimalFormat;
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public class
DecimalFormatDemo
3{
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public static void
main(String[] args)
5
{
DecimalFormat pattern00dot000
=
new
DecimalFormat("00.000");
6
DecimalFormat pattern0dot00
=
new
DecimalFormat("0.00");
7
8
double
d = 12.3456789;
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System.out.println("Pattern 00.000");
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System.out.println(pattern00dot000.format(d));
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System.out.println("Pattern 0.00");
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System.out.println(pattern0dot00.format(d));
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double
money = 19.8;
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System.out.println("Pattern 0.00");
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System.out.println("$" + pattern0dot00.format(money));
16
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DecimalFormat percent =
new
DecimalFormat("0.00%");
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System.out.println("Pattern 0.00%");
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System.out.println(percent.format(0.308));
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DecimalFormat eNotation1 =
new
DecimalFormat("#0.###E0");//1
or
2 digits before point
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DecimalFormat eNotation2 =
23
new
DecimalFormat("00.###E0");//2 digits before point
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System.out.println("Pattern #0.###E0");
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System.out.println(eNotation1.format(123.456));
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System.out.println("Pattern 00.###E0");
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System.out.println(eNotation2.format(123.456));
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double
smallNumber = 0.0000123456;
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System.out.println("Pattern #0.###E0");
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System.out.println(eNotation1.format(smallNumber));
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System.out.println("Pattern 00.###E0");
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System.out.println(eNotation2.format(smallNumber));
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}
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}
(continued)
