Draw triangle in JPanel

Complete source code below will show you, how to draw triangle in JPanel

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COMPLETE SOURCE CODE FOR : DrawTriangle.java
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import javax.swing.*;

import java.awt.*;

public class DrawTriangle extends JPanel
{
public DrawTriangle()
{
 JFrame frame=new JFrame("Draw triangle in JPanel");
 frame.add(this);

 frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 frame.setSize(400,400);
 frame.setLocationRelativeTo(null);
 frame.setVisible(true);
}

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

 //All triangle corner x coordinate
 int[]x={0,150,300};

 //All triangle corner y coordinate
 int[]y={200,0,200};

 //Set color base on RGB
 //You can get RGB value for your color at "Color picker" at above
 //R=255
 //G=192
 //B=0
 //So after this all you draw will use this color
 g.setColor(new Color(255,192,0));

 //Draw triangle in JPanel
 g.fillPolygon(x,y,3);

 //Set color base on RGB
 //You can get RGB value for your color at "Color picker" at above
 //R=1
 //G=1
 //B=1
 //So after this all you draw will use this color
 g.setColor(new Color(1,1,1));

 //Set font that will use when draw String
 g.setFont(new Font("Arial",Font.BOLD,14));

 //Draw String in JPanel
 g.drawString("(0,200)",10,200);
 g.drawString("(150,0)",150,20);
 g.drawString("(300,200)",290,200);
}

public static void main(String[]args)
{
 DrawTriangle dt=new DrawTriangle();
}

}

*********************************************************************
JUST COMPILE AND EXECUTE IT
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Compare current date with user input date in java

Complete source code below will show you, how to compare current date with user input date in java.

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COMPLETE SOURCE CODE FOR : GetDate.java
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import java.util.Date;

import javax.swing.*;

import java.awt.*;

import java.awt.event.*;

public class GetDate implements ActionListener
{
int year=0;
int month=0;
int date=0;

String [] yearContent={"2000","2001","2002","2003","2004","2005","2006","2007","2008","2009","2010","2011"};
String [] monthContent={"January","February","March","April","Mei","Jun","July","August","September","October","November","December"};
String [] dateContent={"1","2","3","4","5","6","7","8","9","10",
    "11","12","13","14","15","16","17","18","19","20",
    "21","22","23","24","25","26","27","28","29","30",
    "31"};

JComboBox yearComboBox=new JComboBox(yearContent);
JComboBox monthComboBox=new JComboBox(monthContent);
JComboBox dateComboBox=new JComboBox(dateContent);

JButton button=new JButton("Click here to compare to current date");

JFrame frame=new JFrame("Compare date with current date");

public GetDate()
{
button.addActionListener(this);

Box box=Box.createHorizontalBox();
box.add(dateComboBox);
box.add(monthComboBox);
box.add(yearComboBox);

frame.setLayout(new GridLayout(2,1));

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(box);
frame.add(button);
frame.setSize(500,100);
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}

public void actionPerformed(ActionEvent event)
{
if(event.getSource()==button)
{
 String tempDate=(String)dateComboBox.getSelectedItem();
 date=Integer.parseInt(tempDate);

 month=monthComboBox.getSelectedIndex();

 String tempYear=(String)yearComboBox.getSelectedItem();
 year=Integer.parseInt(tempYear)-1900;

 Date currentDateValue=new Date();
 Date userChooserDate=new Date(year,month,date);

 int currentYear=currentDateValue.getYear();
 int currentMonth=currentDateValue.getMonth();
 int currentDate=currentDateValue.getDate();

 if((date==currentDate)&&(month==currentMonth)&&(year==currentYear))
 {
  JOptionPane.showMessageDialog(frame,"Same date","SAME",JOptionPane.INFORMATION_MESSAGE);
 }
 else if(userChooserDate.compareTo(currentDateValue)<0)>0)
 {
  JOptionPane.showMessageDialog(frame,"Welcome to the future","FUTURE",JOptionPane.INFORMATION_MESSAGE);
 }
}
}

public static void main(String[]args)
{
GetDate gd=new GetDate();
}
}

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JUST COMPILE AND EXECUTE IT
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