import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
 
public class Random extends JApplet 
{

	private SmallButtonPanel panel1;
	private BigButtonPanel panel2;
	private SliderPanel panel3;
	private DrawPanel panel4;
	private int panelchoice = 0, y = 0;
 
	public void init ( )  
	{
		setBackground ( Color.black );
		Container contentPane = getContentPane();
        	contentPane.setLayout ( new GridLayout ( 2, 2, 5, 5 ) );
   
		panel1 = new SmallButtonPanel ( );
        	contentPane.add ( panel1 );

		panel2 = new BigButtonPanel ( );
        	contentPane.add ( panel2 );

		panel3 = new SliderPanel ( );
        	contentPane.add ( panel3 );

		panel4 = new DrawPanel ( );
        	contentPane.add ( panel4 );
	}

	public Insets getInsets ( ) 
	{
		return new Insets ( 5, 5, 5, 5 );
	}
 
	class SmallButtonPanel extends JPanel implements ActionListener   
	{

		public SmallButtonPanel ( )   
		{
			setBackground ( Color.blue );
       			JButton small = new JButton ( " Random Rectangle " );
       			small.addActionListener ( this );  
       			this.add ( small );
		}

   		public void actionPerformed ( ActionEvent evt ) 
		{
      			String command = evt.getActionCommand();
               
      			if ( command.equals ( " Random Rectangle " ) )   
			{
 	        		panelchoice = 1;
				panel4.repaint ( );
			}
   		}
	}
 
	class BigButtonPanel extends JPanel implements ActionListener   
	{

		public BigButtonPanel ( )   
		{
			setLayout(new BorderLayout());
			setBackground ( Color.cyan );
       			JButton big = new JButton ( " Random Line " );
       			big.addActionListener ( this );  
       			this.add ( big, BorderLayout.CENTER );
		}

   		public void actionPerformed ( ActionEvent evt ) 
		{
      			String command = evt.getActionCommand();
               
      			if ( command.equals ( " Random Line " ) )   
                	{
 	        		panelchoice = 2;
				panel4.repaint ( );
			}
   		}
	}
 
	class SliderPanel extends JPanel implements ChangeListener   
	{

		JSlider slide;

		public SliderPanel ( )   
		{
			setLayout(new BorderLayout());
			setBackground ( Color.magenta );
			slide = new JSlider ( 0, 225, 100 );
			slide.setOrientation ( JSlider.VERTICAL );
			slide.addChangeListener ( this );
			this.add ( slide, BorderLayout.EAST );
		}

		public void stateChanged ( ChangeEvent e )   
		{
			if ( e.getSource() == slide )   
            		{
				panelchoice = 3;
	            		y = slide.getValue ( );
				panel4.repaint ( );
			}
		}
	}
 
	class DrawPanel extends JPanel 
	{
		private int x, otherx, othery;

		public DrawPanel ( )   
		{
			setBackground ( Color.yellow );
		}

		public void paintComponent ( Graphics g ) 
		{
			super.paintComponent ( g );
			if ( panelchoice == 1 )   
			{
				x = (int)(Math.random ( ) * ( getWidth ( ) - 20 ) );
				y = (int)(Math.random ( ) * ( getHeight ( ) - 20 ) );
				g.setColor ( Color.green );
				g.fillRect ( x, y, 20, 20 );
			}
			else if ( panelchoice == 2 )   
			{
				x = (int)(Math.random ( ) * getWidth ( ) );
				y = (int)(Math.random ( ) * getHeight ( ) );
				otherx = (int)(Math.random ( ) * getWidth ( ) );
				othery = (int)(Math.random ( ) * getHeight ( ) );
				g.setColor ( Color.blue );
				g.drawLine ( x, y, otherx, othery );
			}
			else if ( panelchoice == 3 )   
			{
				x = getWidth ( ) / 2;
				g.setColor ( Color.black );
				g.fillOval ( x, 225 - y, 20, 20 );
			}
		}
	}
}