VisualMobileSystem

[micheal frost]

below is the code for by VisualMobileSystem program.

[B]import[/B] java.awt.*;
[B]import[/B] java.applet.Applet;
[B]import[/B] java.awt.event.*;
 
[B]public class[/B] VisualMobileSystem [B]extends Applet[/B] [B]implements[/B] [/B]MouseListener, MouseMotionListener[/B]
{
// instance variables
[B]private[/B] MobileSystem vodaPhone;
[B]private[/B] MobileStation ms;
[B]private[/B] TextArea textarea;
 
[B]public void[/B] init()
{
// provide any initialisation necessary for your Applet
vodaPhone = new MobileSystem("VodaPhone Systems");
ms = new MobileStation("Siemes 45i", 100, 100);
Label title =  new Label(vodaPhone.getName());
textarea=new TextArea(4,80);
add(title);
add(textarea);
[B]addMouseMotionListener(this)[/B];
[B]addMouseListener(this)[/B];
}
 
[B]public void [/B]paint(Graphics g)
{
super.paint(g); // to allow painting any contained components
vodaPhone.draw(g);
ms.draw(g);
}
 
[B]public[B] String getAppletInfo()
{
// replace this with your own info
return "Title: Mobile System Applet \n" +
"Author: CPwJ\n" +
"A simple applet that draws the mobile system topology.";
}
 
[B]public void[/B] mouseReleased(MouseEvent e) {}
[B]public void[/B] mouseEntered(MouseEvent e) {}
[B]public void[/B] mouseExited(MouseEvent e) {}
[B]public void[/B] mouseClicked(MouseEvent e) {}
[B]public void[B] mouseMoved(MouseEvent e) {}
 
[B]public void[/B] mousePressed(MouseEvent e)
{
textarea.setText(""); // clear the content of textarea
mouseDragged(e);
}
 
[B]public void[/B] mouseDragged(MouseEvent e)
{
[B]int[/B] x = e.getX();
[B]int[/B] y = e.getY();
moveMobileStation(x,y); // call method to set new mobilestation location
}
 
[B]private void[/B] moveMobileStation(int x, int y)
{
ms.setLocation(x,y);
serveMobileStation(ms, vodaPhone);
updateStatus(ms);
[B]repaint[/B](); //Refresh Graphics which in turn will call the paint(Graphics) method
}
[B]private static void[/B] serveMobileStation(MobileStation ms, MobileSystem msc)
{
Rbs servingRbs = msc.findRbs(ms.getX(),ms.getY());
[B]if[/B] (servingRbs != null)
ms.connectRbs(servingRbs);
else
ms.releaseRbs();
}
[B]private void[/B] updateStatus(MobileStation ms)
{
[B]int[/B] x = ([B]int[/B]) ms.getX();
[B]int[/B] y = [B](int)[/B] ms.getY();
Rbs rbs = ms.connectedRbs();
[B]if [/B](rbs != null )
textarea.append("Point" + x +","+y+" served by:"+rbs+"\n");
[B]else[/B]
textarea.append("Point" + x +","+y+" cannot be served.\n");
}
}
 

  

these are thethings the compiler is talking about


C:\Documents and Settings\ABK\My Documents\PA\VisualMobileSystem.java:8: cannot find symbol
symbol : class MobileSystem
location: class VisualMobileSystem
private MobileSystem vodaPhone;
^
C:\Documents and Settings\ABK\My Documents\PA\VisualMobileSystem.java:9: cannot find symbol
symbol : class MobileStation
location: class VisualMobileSystem
private MobileStation ms;
^
C:\Documents and Settings\ABK\My Documents\PA\VisualMobileSystem.java:66: cannot find symbol
symbol : class MobileStation
location: class VisualMobileSystem
private static void serveMobileStation(MobileStation ms, MobileSystem msc)
^
C:\Documents and Settings\ABK\My Documents\PA\VisualMobileSystem.java:66: cannot find symbol
symbol : class MobileSystem
location: class VisualMobileSystem
private static void serveMobileStation(MobileStation ms, MobileSystem msc)
^
C:\Documents and Settings\ABK\My Documents\PA\VisualMobileSystem.java:74: cannot find symbol
symbol : class MobileStation
location: class VisualMobileSystem
private void updateStatus(MobileStation ms)
^
C:\Documents and Settings\ABK\My Documents\PA\VisualMobileSystem.java:15: cannot find symbol
symbol : class MobileSystem
location: class VisualMobileSystem
vodaPhone = new MobileSystem("VodaPhone Systems");
^
C:\Documents and Settings\ABK\My Documents\PA\VisualMobileSystem.java:16: cannot find symbol
symbol : class MobileStation
location: class VisualMobileSystem
ms = new MobileStation("Siemes 45i", 100, 100);
^
C:\Documents and Settings\ABK\My Documents\PA\VisualMobileSystem.java:68: cannot find symbol
symbol : class Rbs
location: class VisualMobileSystem
Rbs servingRbs = msc.findRbs(ms.getX(),ms.getY());
^
C:\Documents and Settings\ABK\My Documents\PA\VisualMobileSystem.java:78: cannot find symbol
symbol : class Rbs
location: class VisualMobileSystem
Rbs rbs = ms.connectedRbs();
^
9 errors

Tool completed with exit code 1

[Eideo Guo]

you have to import the class MobileSystem,MobileStation