Set JOptionPane warning icon

Complete source code below will show you, how to set warning icon in JOptionPane.

**************************************************************************
COMPLETE SOURCE CODE FOR : SetJOptionPaneWarningIcon.java
**************************************************************************

import javax.swing.*;

public class SetJOptionPaneWarningIcon
{
public static void main(String[]args)
{
 //null-Message Box appear in no parent component
 //Warning Icon-text in message box
 //WARNING-JOptionPane title
 //JOptionPane.WARNING_MESSAGE-Set warning icon that will be show in message box
 JOptionPane.showMessageDialog(null,"Warning Icon","WARNING",JOptionPane.WARNING_MESSAGE);
}
}

**************************************************************************
JUST COMPILE AND EXECUTE IT
**************************************************************************

Set JOptionPane error icon

Complete source code below will show you, how to set error icon in JOptionPane.

**************************************************************************
COMPLETE SOURCE CODE FOR : SetJOptionPaneErrorIcon.java
**************************************************************************

import javax.swing.*;

public class SetJOptionPaneErrorIcon
{
public static void main(String[]args)
{
 //null-Message Box appear in no parent component
 //Error Icon-text in message box
 //ERROR-JOptionPane title
 //JOptionPane.ERROR_MESSAGE-Set error icon that will be show in message box
 JOptionPane.showMessageDialog(null,"Error Icon","ERROR",JOptionPane.ERROR_MESSAGE);
}
}

**************************************************************************
JUST COMPILE AND EXECUTE IT
**************************************************************************

Set JOptionPane information icon

Complete source code below will show you, how to set information icon in JOptionPane.

**************************************************************************
COMPLETE SOURCE CODE FOR : SetJOptionPaneInformationIcon.java
**************************************************************************

import javax.swing.*;

public class SetJOptionPaneInformationIcon
{
public static void main(String[]args)
{
 //null-Message Box appear in no parent component
 //Information Icon-text in message box
 //INFORMATION-JOptionPane title
 //JOptionPane.INFORMATION_MESSAGE-Set information icon that will be show in message box
 JOptionPane.showMessageDialog(null,"Information Icon","INFORMATION",JOptionPane.INFORMATION_MESSAGE);
}
}

**************************************************************************
JUST COMPILE AND EXECUTE IT
**************************************************************************

Set JOptionPane question icon

Complete source code below will show you, how to set question icon in JOptionPane.

**************************************************************************
COMPLETE SOURCE CODE FOR : SetJOptionPaneQuestionIcon.java
**************************************************************************

import javax.swing.*;

public class SetJOptionPaneQuestionIcon
{
public static void main(String[]args)
{
 //null-Message Box appear in no parent component
 //Question Icon-text in message box
 //QUESTION-JOptionPane title
 //JOptionPane.QUESTION_MESSAGE-Set question icon that will be show in message box
 JOptionPane.showMessageDialog(null,"Question Icon","QUESTION",JOptionPane.QUESTION_MESSAGE);
}
}

**************************************************************************
JUST COMPILE AND EXECUTE IT
**************************************************************************

Create simple digital clock in java

Complete source code below, will show you, how to create simple digital clock in java.

************************************************************************
COMPLETE SOURCE CODE FOR : SimpleDigitalClock.java
************************************************************************

import javax.swing.*;

import java.awt.*;

import java.util.Date;

public class SimpleDigitalClock extends JPanel
{
JFrame frame;

int currentHour;
int currentMinute;
int currentSecond;

//Font that will be use to show digital clock
Font myFont=new Font("Tahoma",Font.BOLD+Font.ITALIC,20);

//Color that will be use to show digital clock
Color myColor=new Color(255,0,0);

//Font metrics that will use to store font informations
//For example, width of a character
FontMetrics fm;

public SimpleDigitalClock()
{
//Create a window using JFrame with title ( Simple Digital Clock )
frame=new JFrame("Simple Digital Clock");

//add(this) mean add created panel into JFrame
//Which panel ?
//See line 81 and 7 (I hope you understand it)
frame.add(this);

//Set default close operation for JFrame
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

//Set JFrame size
frame.setSize(300,300);

//Make JFrame locate at center
frame.setLocationRelativeTo(null);

//Make JFrame visible
frame.setVisible(true);

/*
 *Loop that will make sure panel show current time
 *like current second, current minute and current hour.
 */
while(true)
{
 //It will do all code in method paint(See line 67)
 repaint();

 try
 {
  Thread.sleep(900);
 }
 catch(Exception exception)
 {
  exception.printStackTrace();
 }
}
}

public void paint(Graphics g)
{
super.paint(g);

/*
 *Create  current Date object. It means it store information
 *about current hour, minute and second.
 */
Date myDate=new Date();

currentHour=myDate.getHours();
currentMinute=myDate.getMinutes();
currentSecond=myDate.getSeconds();

//Set font that will use to draw digital number
g.setFont(myFont);

//Information about distance between number in digital clock
fm=g.getFontMetrics();
int hourXCoordinate=20;
int minuteXCoordinate=hourXCoordinate+(fm.getMaxAdvance()*2);
int secondXCoordinate=hourXCoordinate+(fm.getMaxAdvance()*4);

//Set color that will use to draw digital number
g.setColor(myColor);

//Draw hour, draw (:) between number, draw minute and draw second.
g.drawString(Integer.toString(currentHour),hourXCoordinate,20);
g.drawString(":",(hourXCoordinate+minuteXCoordinate)/2,20);
g.drawString(Integer.toString(currentMinute),minuteXCoordinate,20);
g.drawString(":",(secondXCoordinate+minuteXCoordinate)/2,20);
g.drawString(Integer.toString(currentSecond),secondXCoordinate,20);
}

public static void main(String[]args)
{
SimpleDigitalClock sdc=new SimpleDigitalClock();
}
}

************************************************************************
JUST COMPILE AND EXECUTE IT
************************************************************************