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Pelajari alur filter, map, dan collect untuk mengolah data Java dengan kode yang mudah dibaca.
In this code snippet you will see how to sort the content of an Enumeration object. We start by creating a random numbers and stored it in a Vector. We use these numbers and create a Enumeration object by calling Vector‘s elements() method. We convert it to java.util.List and then sort the content of the […]
The following example show you how to use the Spring’s JdbcTemplate class to insert a record into database. package org.kodejava.spring.jdbc; import org.springframework.jdbc.core.JdbcTemplate; import org.springframework.jdbc.datasource.DriverManagerDataSource; import javax.sql.DataSource; import java.sql.Types; import java.util.Date; public class InsertDemo { private static final String INSERT_QUERY = """ INSERT INTO record (title, release_date, artist_id, label_id, created)...
In this example you will learn how to create and configure a DriverManagerDataSource object that will be used by the JdbcTemplate object. There are some information required when creating a DataSource including the JDBC driver class, the JDBC Url of the target database, the username and password for connecting to database server. package org.kodejava.spring.jdbc; import […]
The following example shows you how to read file contents into byte array. We use the IOUtils class of the Apache Commons IO library. package org.kodejava.commons.io; import org.apache.commons.io.IOUtils; import java.io.File; import java.io.FileInputStream; import java.io.IOException; import java.io.InputStream; public class FileToByteArray { public static void main(String[] args) { File file = new File("README.md"); try { InputStream is […]
The example below demonstrates you how to create a JTree that have a different icons for each node of the tree. package org.kodejava.swing; import javax.swing.*; import javax.swing.tree.DefaultMutableTreeNode; import javax.swing.tree.TreeCellRenderer; import java.awt.*; import java.net.URL; public class JTreeDifferentNodeIcon extends JFrame { public JTreeDifferentNodeIcon() throws HeadlessException { initializeUI(); } public static void main(String[] args) { SwingUtilities.in...
This example demonstrates how to use the expand-all and / or collapse-all features in the java.swing.JTree swing component. package org.kodejava.swing; import javax.swing.*; import javax.swing.tree.DefaultMutableTreeNode; import javax.swing.tree.TreePath; import javax.swing.tree.TreeNode; import java.awt.*; import java.util.Enumeration; public class JTreeNodeAutoExpandCollapse extends JFrame { public JTreeNodeAutoExpandCollapse() throws HeadlessException { initializeUI(); } p...
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