fahmijafar: 2013

Tuesday, December 10, 2013

Numeric conversion into word (Konversi terbilang)

Here is the example of numeric conversion into word (Konversi terbilang - Bahasa Indonesia) which can handle amount until billion (milyar).

 
public class Konversi {
   public static void main (String[] args) {  
     long cek = 543555;  
     System.out.println(konversi(cek));  
     String test = "145.000.000";  
     System.out.println(test.replace(".", ""));  
   }  
   public static String konversi(Long angka) {  
     String[] bil = {"", "satu", "dua", "tiga", "empat", "lima", "enam", "tujuh", "delapan", "sembilan", "sepuluh", "sebelas"};  
     String x = " ";  
     long trilyun = 1000000000000L;  
     if (angka < 12) {   
       x = " " + bil[angka.intValue()];  
     } else if (angka < 20) {  
       x = konversi(angka - 10) + " belas";  
     } else if (angka < 100) {  
       x = konversi(angka / 10) + " puluh" + konversi(angka % 10);  
     } else if (angka < 200) {  
       x = "seratus" + konversi(angka - 100);  
     } else if (angka < 1000) {  
       x = konversi(angka / 100) + " ratus" + konversi(angka % 100);  
     } else if (angka < 2000) {  
       x = "seribu" + konversi(angka - 1000);  
     } else if (angka < 1000000) {  
       x = konversi(angka / 1000) + " ribu" + konversi(angka % 1000);  
     } else if (angka < 1000000000) {  
       x = konversi(angka / 1000000) + " juta" + konversi(angka % 1000000);  
     } else if (angka < trilyun) {  
       x = konversi(angka / 1000000000) + " milyar" + konversi(angka % 1000000000);  
     }  
     return x;  
   }  
}

Sunday, November 17, 2013

Java Beans

Here are some of my notes on learning about Java Beans :

Java Beans are reusable software components for Java.
They are classes that encapsulates many objects into a single object (the bean).
They are serializable (to save the state of an object), have a no-argument constructor (to instantiate the object), and allow access to properties using getter and setter methods.

As an example, here is the User beans with 2 properties :

package beans;  
public class User {  
      private String email;  
      private String password;  
      public String getEmail() {  
           return email;  
      }  
      public void setEmail(String email) {  
           this.email = email;  
      }  
      public String getPassword() {  
           return password;  
      }  
      public void setPassword(String password) {  
           this.password = password;  
      }  
}

After create that class, we can call it from JSP file either to set the value or get the value.

setbean.jsp


 <%@ page language="java" contentType="text/html; charset=ISO-8859-1"  
   pageEncoding="ISO-8859-1"%>  
 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" 
"http://www.w3.org/TR/html4/loose.dtd">  
 <html>  
 <head>  
 <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">  
 <title>Set beans</title>  
 </head>  
 <body>  
 
 <jsp:useBean id="user" class="beans.User" scope="session"></jsp:useBean>  
 <jsp:setProperty property="email" name="user" 
     value="fahmi@gmail.com" />  
 <jsp:setProperty property="password" name="user" value="letmein" />  
 
 </body>  
 </html>

getbean.jsp


<%@ page language="java" contentType="text/html; charset=ISO-8859-1"  
   pageEncoding="ISO-8859-1"%>  
 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" 
"http://www.w3.org/TR/html4/loose.dtd">  
 <html>  
 <head>  
 <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">  
 <title>Insert title here</title>  
 </head>  
 <body>  
 <jsp:useBean id="user" class="beans.User" scope="session"></jsp:useBean>  
 Email : <%= user.getEmail() %>  
 </body>  
 </html>

Once those files created, start Apache Tomcat Server, access setbean.jsp to set the value for User beans, then on the same browser access getbean.jsp to see the User beans value.