Traffic Signal

Code :<br /> import java.awt.*;<br /> import java.applet.*;<br /> import java.awt.event.*;<br /> public class traffic extends Applet implements Runnable<br /> {<br /> Thread t;<br /> Font f,f1;<br /> int i=0,a=0,j=0;<br /> public void init(){</p> <p> setBackground(Color.lightGray);</p> <p>f=new Font(“TimesNewRoman”,f.ITALIC,28);<br /> f1=new Font(“TimesNewRoman”,Font.ITALIC+Font.BOLD,28);</p> <p>}<br /> public void start()<br /> {<br /> t=new Thread(this);<br /> t.start();<br /> }</p> <p>public void run()<br /> {</p> <p>for(i=25;i>=0;i–)//countdown<br /> {</p> <p>try<br /> {<br /> Thread.sleep(1000);<br /> }<br /> catch(Exception e)<br /> {<br /> System.out.println(e);<br /> }<br /> if(i<=25 && i>3)//red<br /> {<br /> a=1;<br /> repaint();<br /> }<br /> else<br /> if(i<=3 && i>0)//yelloe<br /> {<br /> a=2;<br /> repaint();<br /> }<br /> else<br /> if(i==0)//green<br /> {</p> <p> for(j=0;j<25;j++)<br /> {<br /> a=3;<br /> try<br /> {<br /> Thread.sleep(1000);<br /> }<br /> catch(Exception e)<br /> {<br /> System.out.println(e);<br /> }</p> <p> repaint();</p> <p>}</p> <p> if(j==25)//end of green(return to red)<br /> {<br /> run();<br /> }</p> <p>}</p> <p>}</p> <p>repaint();<br /> }</p> <p>public void paint(Graphics g)<br /> {<br /> setBackground(Color.lightGray);//ROAD</p> <p>g.setColor(Color.black);//pole top<br /> g.fillArc(100,150,100,100,0,180);<br /> g.drawArc(100,150,100,100,0,180);</p> <p>g.setColor(Color.black);//POLE UP<br /> g.fillRect(150,150,50,150);<br /> g.drawRect(150,150,50,150);</p> <p>g.setColor(Color.black);//POLE DOWN<br /> g.fillRect(165,300,20,155);<br /> g.drawRect(165,300,20,155);</p> <p>g.drawOval(150,150,50,50);//RED</p> <p>g.drawOval(150,200,50,50);//YELLOW</p> <p>g.drawOval(150,250,50,50);//GREEN</p> <p>g.setColor(Color.red);//COUNTDOWN STOP<br /> g.setFont(f);<br /> g.drawString(“”+i,50,50);</p> <p>g.setColor(Color.white);//CROSSING1<br /> g.fillRect(300,5,15,125);<br /> g.drawRect(300,5,15,125);</p> <p>g.setColor(Color.white);<br /> g.fillRect(300,145,15,135);<br /> g.drawRect(300,145,15,135);</p> <p>g.setColor(Color.white);<br /> g.fillRect(300,300,15,135);<br /> g.drawRect(300,300,15,135);</p> <p>g.setColor(Color.white);//CROSSING2<br /> g.fillRect(450,5,15,125);<br /> g.drawRect(450,5,15,125);</p> <p>g.setColor(Color.white);<br /> g.fillRect(450,145,15,135);<br /> g.drawRect(450,145,15,135);</p> <p>g.setColor(Color.white);<br /> g.fillRect(450,300,15,135);<br /> g.drawRect(450,300,15,135);</p> <p>g.setColor(Color.black);//TREE1DOWN<br /> g.fillRect(600,300,15,135);<br /> g.drawRect(600,300,15,135);</p> <p>g.setColor(Color.green);//TREE1UP<br /> g.fillArc(560,290,100,100,0,180);<br /> g.drawArc(560,290,100,100,0,180);</p> <p>g.setColor(Color.black);//TREE2DOWN<br /> g.fillRect(460,300,15,135);<br /> g.drawRect(460,300,15,135);</p> <p>g.setColor(Color.green);//TREE2UP<br /> g.fillArc(420,290,100,100,0,180);<br /> g.drawArc(420,290,100,100,0,180);</p> <p>if(a==1)//REDSIGNAL<br /> {<br /> g.setColor(Color.red);<br /> g.fillOval(150,150,50,50);<br /> g.drawOval(150,150,50,50);<br /> g.drawString(“STOP”,50,150);<br /> }<br /> if(a==2)//YELLOWSIGNAL<br /> {<br /> g.setColor(Color.yellow);<br /> g.fillOval(150,200,50,50);<br /> g.drawOval(150,200,50,50);<br /> g.drawString(“READY”,50,200);<br /> }<br /> if(a==3)//GREENSIGNAL<br /> {<br /> g.setColor(Color.blue);//countdown<br /> g.setFont(f);<br /> g.drawString(“”+j,150,50);</p> <p> g.setColor(Color.green);<br /> g.fillOval(150,250,50,50);<br /> g.drawOval(150,250,50,50);<br /> g.drawString(“GO”,50,250);</p> <p>}</p> <p>int x1[]={220,300,300,280};<br /> int y1[]={250,150,250,150};<br /> int n1=4;<br /> int n2=3;<br /> int x2[]={340,380,380};<br /> int y2[]={150,100,150};</p> <p> int x3[]={460,460,500};<br /> int y3[]={150,100,150};</p> <p>g.setColor(Color.black);<br /> g.fillPolygon(x1,y1,n1);<br /> g.drawPolygon(x1,y1,n1);</p> <p> g.setColor(Color.yellow);<br /> g.fillRect(380,100,80,50);<br /> g.drawRect(380,100,80,50);</p> <p>g.setColor(Color.yellow);<br /> g.fillPolygon(x2,y2,n2);<br /> g.drawPolygon(x2,y2,n2);</p> <p>g.setColor(Color.yellow);<br /> g.fillPolygon(x3,y3,n2);<br /> g.drawPolygon(x3,y3,n2);</p> <p>g.setColor(Color.black);<br /> g.fillOval(440,210,60,60);<br /> g.drawOval(440,210,60,60);</p> <p>g.setColor(Color.black);<br /> g.fillOval(340,210,60,60);<br /> g.drawOval(340,210,60,60);</p> <p>g.setColor(Color.red);<br /> g.fillRect(300,150,250,100);<br /> g.drawRect(300,150,250,100);</p> <p>g.setColor(Color.black);<br /> g.setFont(f1);<br /> g.drawString (“Zumbo”,380,200);</p> <p>}<br /> }</p> <p>