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How do I use NumberFormat to format doubles?
Author: Deron Eriksson
Description: This Java tutorial describes how to use NumberFormat to format doubles.
Tutorial created using:
Windows XP || JDK 1.5.0_09 || Eclipse Web Tools Platform 2.0 (Eclipse 3.3.0)
(Continued from page 1) The output of the NumberFormatTest class is shown below. We see five different NumberFormat formats. First, we see the default format, which formats doubles to three places to the right of the decimal point, with groupings to the left of the decimal point happening every three digits. The second format sets the number of digits to the right of the decimal point to be between 2 and 4. The third format sets the minimum number of digits to the left of the decimal point to be 6. As a result, we see padding with zeros to the left of the decimal point. The fourth format sets the maximum number of digits to the left of the decimal point to be 5. As a result, it chops off digits past this this point. The fifth format turns off grouping, so no grouping characters (in this example, commas) are shown in the formatted results. Format:default formatted:0 | unformatted:0.0 formatted:3.142 | unformatted:3.141592653589793 formatted:25.133 | unformatted:25.132741228718345 formatted:254.469 | unformatted:254.46900494077323 formatted:3,216.991 | unformatted:3216.990877275948 formatted:49,087.385 | unformatted:49087.385212340516 formatted:879,444.881 | unformatted:879444.8810753123 formatted:18,110,656.471 | unformatted:1.8110656471007094E7 formatted:421,657,428.266 | unformatted:4.216574282663131E8 formatted:10,954,056,258.833 | unformatted:1.0954056258833088E10 formatted:314,159,265,358.979 | unformatted:3.141592653589793E11 Format:min fraction digits 2, max fraction digits 4 formatted:0.00 | unformatted:0.0 formatted:3.1416 | unformatted:3.141592653589793 formatted:25.1327 | unformatted:25.132741228718345 formatted:254.469 | unformatted:254.46900494077323 formatted:3,216.9909 | unformatted:3216.990877275948 formatted:49,087.3852 | unformatted:49087.385212340516 formatted:879,444.8811 | unformatted:879444.8810753123 formatted:18,110,656.471 | unformatted:1.8110656471007094E7 formatted:421,657,428.2663 | unformatted:4.216574282663131E8 formatted:10,954,056,258.8331 | unformatted:1.0954056258833088E10 formatted:314,159,265,358.9793 | unformatted:3.141592653589793E11 Format:min integer digits 6 formatted:000,000 | unformatted:0.0 formatted:000,003.142 | unformatted:3.141592653589793 formatted:000,025.133 | unformatted:25.132741228718345 formatted:000,254.469 | unformatted:254.46900494077323 formatted:003,216.991 | unformatted:3216.990877275948 formatted:049,087.385 | unformatted:49087.385212340516 formatted:879,444.881 | unformatted:879444.8810753123 formatted:18,110,656.471 | unformatted:1.8110656471007094E7 formatted:421,657,428.266 | unformatted:4.216574282663131E8 formatted:10,954,056,258.833 | unformatted:1.0954056258833088E10 formatted:314,159,265,358.979 | unformatted:3.141592653589793E11 Format:max integer digits 5 formatted:0 | unformatted:0.0 formatted:3.142 | unformatted:3.141592653589793 formatted:25.133 | unformatted:25.132741228718345 formatted:254.469 | unformatted:254.46900494077323 formatted:3,216.991 | unformatted:3216.990877275948 formatted:49,087.385 | unformatted:49087.385212340516 formatted:79,444.881 | unformatted:879444.8810753123 formatted:10,656.471 | unformatted:1.8110656471007094E7 formatted:57,428.266 | unformatted:4.216574282663131E8 formatted:56,258.833 | unformatted:1.0954056258833088E10 formatted:65,358.979 | unformatted:3.141592653589793E11 Format:grouping off formatted:0 | unformatted:0.0 formatted:3.142 | unformatted:3.141592653589793 formatted:25.133 | unformatted:25.132741228718345 formatted:254.469 | unformatted:254.46900494077323 formatted:3216.991 | unformatted:3216.990877275948 formatted:49087.385 | unformatted:49087.385212340516 formatted:879444.881 | unformatted:879444.8810753123 formatted:18110656.471 | unformatted:1.8110656471007094E7 formatted:421657428.266 | unformatted:4.216574282663131E8 formatted:10954056258.833 | unformatted:1.0954056258833088E10 formatted:314159265358.979 | unformatted:3.141592653589793E11 |