การแปลงตัวเลขสากลเป็นตัวเลขไทยใน Java

ต่อไปนี้เป็นตัวอย่างการแปลงตัวเลขสากลเป็นตัวเลขไทยใน Java ครับ ซึ่งถ้าหากเคยพัฒนาโปรแกรมสำหรับใช้ในราชการ บ่อยครั้งเราอาจจะต้องพัฒนาโปรแกรมเพื่อแสดงในรายงานต่างๆ นี่เป็นตัวอย่างเล็กๆ เพื่อเป็นแนวทางในการพัฒนาต่อไปได้ครับ

ตัวอย่างโคด 

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package demo;          /**  * @author nopphanan7  *   */  public final class ThaiNumber {              private static final String[] DIGIT_TH = { "0", "๑", "๒", "๓", "๔", "๕", "๖", "๗", "๘", "๙" };     private String valueText;          // ···········Methods··············     public String getText(double amount) {         this.valueText = getThaiNumber(String.valueOf(amount));          return this.valueText;      }          public String getText(float amount) {         this.valueText = getThaiNumber(String.valueOf(amount));          return this.valueText;      }          public String getText(int amount) {          this.valueText = getThaiNumber(String.valueOf(amount));          return this.valueText;      }          public String getText(long amount) {         this.valueText = getThaiNumber(String.valueOf(amount));          return this.valueText;      }          public String getText(String amount) {          this.valueText = getThaiNumber(amount.trim());          return this.valueText;      }          public String getText(Number amount) {          this.valueText = getThaiNumber(String.valueOf(amount));          return this.valueText;      }          private static String getThaiNumber(String amount) {          if(amount == null || amount.isEmpty()) return "";           StringBuilder sb = new StringBuilder();         for(char c : amount.toCharArray()){             if(Character.isDigit(c)){                 String index = DIGIT_TH[Character.getNumericValue(c)].toString();                 sb.append(index);             } else {                 sb.append(c);             }         }         return sb.toString();      }          /**      * @param args      */      public static void main(String[] args) {         System.out.println("Negative value of -1257.5463 : " + new ThaiNumber().getText(-1257.5463));          System.out.println("Positive value of 1234.5463 : " + new ThaiNumber().getText(1234.5463));          System.out.println("Negative string value of -1,234.5463 : " + new ThaiNumber().getText("-1,234.5463"));          System.out.println("Positive string value of 1,234.5463 : " + new ThaiNumber().getText("1,234.5463"));      }      }

ผลลัพธ์ที่ได้คือ

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Negative value of -1257.5463 : -๑๒๕๗.๕๔๖๓ Positive value of 1234.5463 : ๑๒๓๔.๕๔๖๓ Negative string value of -1,234.5463 : -๑,๒๓๔.๕๔๖๓ Positive string value of 1,234.5463 : ๑,๒๓๔.๕๔๖๓

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