Java Archives - Page 24 of 24

Display numeric value in reverse order

Apr

16

2013

Example: given a number say 7584, the program should display it in reverse order 4857. public class Reverse { public static void main(String args[]) { int i = 7584; Reverse r = new Reverse(); r.reverseNum(i); } public void reverseNum(int num) { if(num!=0) { System.out.print(num%10); num = num/10; reverseNum(num); } } }

Day of Week

Apr

16

2013

Description: The following program takes three numbers as input date: month, date, year and returns the week-day corresponding to it. Primary Inputs: Three numbers (month m, day d, year yyyy) Primary Output: Determine the week-day (sunday, monday etc.) for the input date. Platform Used: JDK 1.6 with Notepad. import java.io.*; class DayOfWeek { public static void main(String[] args) { // ...

Custom JComboBox with Autocompletion

Apr

16

2013

———————————–SearchBoxModel.java——————————————— package com.example; import java.awt.event.ItemEvent; import java.awt.event.ItemListener; import java.awt.event.KeyEvent; import java.awt.event.KeyListener; import java.util.ArrayList; import javax.swing.AbstractListModel; import javax.swing.ComboBoxEditor; import javax.swing.ComboBoxModel; import javax.swing.JComboBox; import javax.swing.JTextField; public class SearchBoxModel extends AbstractListModel implements ComboBoxModel, KeyListener, ItemListener { private static final long serialVersionUID = 1L; ArrayList db = new ArrayList(); ArrayList data = new ArrayList(); String selection; JComboBox cb; ComboBoxEditor ...

Creating xls file from properties file

Apr

16

2013

Description : The following program read a properties files(yes, they cann be multiple), create a xls file and add properties file name, key and value pair in that xls file Primary Input : 1. Path of the directory where properties files are present.(Currently ,hard-coded) 2. Location and name of xls file (to be created)(also, hard-coded) Primary Output: xls file with ...

Convert dateTime from one Time-zone to another

Apr

16

2013

import java.text.SimpleDateFormat; import java.util.Calendar; import java.util.TimeZone; public class ConvertTimeZone { public static void main(String args[]) { // here we are assuming that we have // date/Time in Africa/Harare(UTC+02) // Time zone // Africa/Harare -> 02/29/2012 23:59:36 String fromTimeZone = "Africa/Harare"; // we want to convert it into // Asia/Riyadh(UTC+03) Time Zone // Asia/Riyadh -> 03/01/2012 ...

Connecting to MySQL in Java Code

Apr

16

2013

Follow the steps below to have a basic program that would connect to your MySQL DB: 1. First of all make sure that your MySQL installation is proper and the DB services are up and running fine. (We are assuming that you’ve setup your DB on localhost. This example, however, is not limited to this and ...

Binary Tree

Apr

16

2013

Binary tree implementation in java <<<<<<<<<<<<<<<<<BinaryTreeNode.java>>>>>>>>>>>>>>>>>>>>>>> public class BinaryTreeNode { private int key; private BinaryTreeNode leftLink; private BinaryTreeNode rightLink; public void setKey(int key) { this.key = key; } public int getKey() { return this.key; } public void setLeftLink(BinaryTreeNode bNode) { this.leftLink = bNode; } public void setRightLink(BinaryTreeNode bNode) { this.rightLink = bNode; } public BinaryTreeNode ...

Binary Search

Apr

16

2013

Binary Search algorithm implementation in Java import java.io.Console; public class BinarySearch { static int[] numArr = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 }; public static void main(String args[]) { for (int i = 0; i < numArr.length; i++) { System.out.print(numArr[i] + "\t"); } System.out.println("\n"); System.out.print("Search? :"); Console con = System.console(); ...

Adding rows and columns in JTable dynamically 5

Mar

25

2013

Java Source code to add Row and Column in JTable dynamically package com.example; import java.awt.BorderLayout; import java.awt.EventQueue; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.util.ArrayList; import java.util.Vector; import javax.swing.JButton; import javax.swing.JCheckBox; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.JScrollPane; import javax.swing.JTable; import javax.swing.WindowConstants; import javax.swing.table.DefaultTableModel; import javax.swing.table.TableColumn; import javax.swing.table.TableColumnModel; public class JTableSample { private JFrame mainFrame ; private JTable ...

Russian Peasant Multiplication 2

Mar

25

2013

Description: Russian Peasant Multiplication. This program allows one to do multiplication by just doing muliplication or division by 2 (and addition). This is interesting since computers generally use base 2 arithmetic.The algorithm is as follows. Start two rows, one with the multiplicand (say, A) and the other the multiplier (say B). The goal is to ...