import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;


public class Bus 
{
	public Bus()
	{
		
	}
	
	class MouseClick implements MouseListener
	{
		public void mousePressed( MouseEvent event )
	      {  
	         
	      }

	      // Do-nothing methods
	      public void mouseReleased( MouseEvent event ) {}
	      public void mouseClicked( MouseEvent event ) {}
	      public void mouseEntered( MouseEvent event ) {}
	      public void mouseExited( MouseEvent event ) {}
		
	}
	
	class WKeyListener implements KeyListener
	{
		public void keyPressed( KeyEvent event ) {
			// TODO Auto-generated method stub
			
		}

		public void keyReleased( KeyEvent event ) {
			// TODO Auto-generated method stub
			
		}

		public void keyTyped( KeyEvent event ) {
			// TODO Auto-generated method stub
			
		}
	}
	
	class AKeyListener implements KeyListener
	{
		public void keyPressed( KeyEvent event ) {
			// TODO Auto-generated method stub
			
		}

		public void keyReleased( KeyEvent event ) {
			// TODO Auto-generated method stub
			
		}

		public void keyTyped( KeyEvent event ) {
			// TODO Auto-generated method stub
			
		}
	}
	
	class SKeyListener implements KeyListener
	{
		public void keyPressed( KeyEvent event ) {
			// TODO Auto-generated method stub
			
		}

		public void keyReleased( KeyEvent event ) {
			// TODO Auto-generated method stub
			
		}

		public void keyTyped( KeyEvent event ) {
			// TODO Auto-generated method stub
			
		}
	}
	
	class DKeyListener implements KeyListener
	{
		public void keyPressed( KeyEvent event ) {
			// TODO Auto-generated method stub
			
		}

		public void keyReleased( KeyEvent event ) {
			// TODO Auto-generated method stub
			
		}

		public void keyTyped( KeyEvent event ) {
			// TODO Auto-generated method stub
			
		}
	}
	
	class UpArrowListener implements KeyListener
	{
		public void keyPressed( KeyEvent event ) {
			// TODO Auto-generated method stub
			
		}

		public void keyReleased( KeyEvent event ) {
			// TODO Auto-generated method stub
			
		}

		public void keyTyped( KeyEvent event ) {
			// TODO Auto-generated method stub
			
		}
	}
	
	class LeftArrowListener implements KeyListener
	{
		public void keyPressed( KeyEvent event ) {
			// TODO Auto-generated method stub
			
		}

		public void keyReleased( KeyEvent event ) {
			// TODO Auto-generated method stub
			
		}

		public void keyTyped( KeyEvent event ) {
			// TODO Auto-generated method stub
			
		}
	}
	
	class DownArrowListener implements KeyListener
	{
		public void keyPressed( KeyEvent event ) {
			// TODO Auto-generated method stub
			
		}

		public void keyReleased( KeyEvent event ) {
			// TODO Auto-generated method stub
			
		}

		public void keyTyped( KeyEvent event ) {
			// TODO Auto-generated method stub
			
		}
	}
	
	class RightArrowListener implements KeyListener
	{
		public void keyPressed( KeyEvent event ) {
			// TODO Auto-generated method stub
			
		}

		public void keyReleased( KeyEvent event ) {
			// TODO Auto-generated method stub
			
		}

		public void keyTyped( KeyEvent event ) {
			// TODO Auto-generated method stub
			
		}
	}
}

Create Bus.java