Java Mania

DecimalFormat

How To Use -使用方法-

Source -DecimalFormatTest.java-

package mania.test;

import java.text.*;

public class DecimalFormatTest
{

  // DecimalFormatの使用方法
  public static void main(String[] args)
  {
    System.out.println("===実行結果===");

    // "00000.0000"
    DecimalFormat format = new DecimalFormat("00000.0000");
    System.out.print(format.toPattern() + ":");
    System.out.println(format.format(2.5));

    // "##%"
    format.applyPattern("##%");
    System.out.print(format.toPattern() + ":");
    System.out.println(format.format(0.2));

    // "\u00A4###"
    format.applyPattern("\u00A4###");
    System.out.print(format.toPattern() + ":");
    System.out.println(format.format(2000));

    // "△######;▼######"
    format.applyPattern("△######;▼######");
    System.out.print(format.toPattern() + ":");
    System.out.println(format.format(20));
    System.out.print(format.toPattern() + ":");
    System.out.println(format.format( - 20));

  }
}

Results -実行結果-

===実行結果===
#00000.0000:00002.5000
#%:20%
?#:￥2000
△#;▼#:△20
△#;▼#:▼20