Ruang untuk merangkai pengetahuan, satu baris kode setiap hari.
Temukan tutorial, ide, dan catatan dari perjalanan belajar.
Pelajari alur filter, map, dan collect untuk mengolah data Java dengan kode yang mudah dibaca.
A JComboBox allows user to select a value from a drop-down items available in the component. When the combo box set to editable user can enter their own value by typing it directly in the combo box editor. The code below demonstrate how you can create a simple combo box component. package org.kodejava.swing; import javax.swing.*; […]
This example demonstrate how to use HSSFCellStyle and HSSFFont to format the cell style in Excel document. Using this class we can define cell border, foreground and background color. We can also define the font we used to display the cell value. package org.kodejava.poi; import org.apache.poi.hssf.usermodel.*; import org.apache.poi.hssf.util.HSSFColor; import org.apache.poi.ss.usermodel.BorderStyle; import org.apache.poi.ss.usermodel.FillPatternType; import java.io.FileOutpu...
This example demonstrate how to create an Excel document using Apache POI library. In this example we create a simple document containing two sheets which have a value on their first cell. package org.kodejava.poi; import org.apache.poi.hssf.usermodel.*; import java.io.FileOutputStream; import java.io.IOException; public class CreateExcelDemo { public static void main(String[] args) { // Creating an instance of […]
This example is the first example of the iText PDF series, we are going to start by learning to use the iText PDF library to create a PDF document. We will see how to use the Document class, getting an instance of PdfWriter, creating a simple Paragraph and set the text alignment and the font. […]
The code below detect if a given string has a non ASCII characters in it. We use the CharsetDecoder class from the java.nio package to decode string to be a valid US-ASCII charset. package org.kodejava.io; import java.nio.charset.CharsetDecoder; import java.nio.charset.CharacterCodingException; import java.nio.CharBuffer; import java.nio.ByteBuffer; import java.nio.charset.StandardCharsets; import java.util.Arrays; public class NonAsciiValidation { public static void main(Str...
This example demonstrate the use of Hibernate’s Restriction.in criterion. This restriction will query for some record based on a collection of parameter defined for a specific property of the bean. package org.kodejava.hibernate; import org.hibernate.SessionFactory; import org.hibernate.Session; import org.hibernate.HibernateException; import org.hibernate.Criteria; import org.hibernate.cfg.Configuration; import org.hibernate.criterion.Restrictions; import org.kodejava.hibern...
Simpan rasa ingin tahu. Selalu ada hal baru untuk dipelajari.
Penulis dan pendiri Diary Coding — berbagi catatan, tutorial, dan pengalaman seputar pemrograman untuk siapa pun yang ingin terus belajar.