Motorbike hashtable

[Tuurbo46]

This post follows my previous post. I am struggling to write to a
hashtable. I have included more code this time. See below:

public void handleAddPlane()
{

String planeRegisNum = "";
String planeModel = "";
System.out.println("User wants to add a plane");

System.out.println("Please enter plane registation number: ");
planeRegisNum = readKeyboard().toUpperCase();
while(planeRegisNum.equals("")){
System.out.println("Wrong entry: ");
}
System.out.println("Please enter plane model number: ");
planeModel = readKeyboard().toUpperCase();
while(planeModel.equals("")){
System.out.println("Wrong entry: ");
}
Block b[] = seatBlocks(planeModel);

AirPlane plane = new AirPlane(b, planeRegisNum, planeModel);
if (!airPlanes.containsKey(planeRegisNum))
{
try {
airPlanes.put(planeRegisNum, plane);
}
catch(Exception ex){
System.out.println("Problem Adding a Plane to a hash
table");
}

System.out.println("Airplane was successfully added");
}


}

Thanks tuurbo

 

[Roedy Green]

I am struggling to write to a
hashtable.

I don't see any code that implements a hashtable or even uses a
HashMap/Hashtable. See http://mindprod.com/jgloss/hashtableh.html

 

[Rhino]

I don't see any code that implements a hashtable or even uses a
HashMap/Hashtable. See http://mindprod.com/jgloss/hashtableh.html

Also, the Subject talks about motorbikes but the code refers to airplanes.

Rhino

 

[Roedy Green]

I don't see any code that implements a hashtable or even uses a
HashMap/Hashtable. See http://mindprod.com/jgloss/hashtableh.html

Whoops. Try http://mindprod.com/jgloss/hashtable.html

 

[Brendan Guild]

Tuurbo46 wrote in news:[email protected]:

public void handleAddPlane()
{

String planeRegisNum = "";
String planeModel = "";
System.out.println("User wants to add a plane");

System.out.println("Please enter plane registation number: ");
planeRegisNum = readKeyboard().toUpperCase();
while(planeRegisNum.equals("")){
System.out.println("Wrong entry: ");
}

It's probably not important, but in the event planeRegisNum.equals(""),
this code will produce very strange results that I doubt are intended.
Otherwise I can't see anything wrong with what you have posted. Perhaps
you should try a simpler example. If you still have problems, it will be
easier for others to find those problems.

[snip]

 

[zero]

AirPlane plane = new AirPlane(b, planeRegisNum, planeModel);
if (!airPlanes.containsKey(planeRegisNum))
{
try {
airPlanes.put(planeRegisNum, plane);
}

The code that we need to see is the definition of "airPlanes" - and just to
be sure, anywhere in the code that mentions the "airPlanes" variable.

So not all your code, just the parts about "airPlanes".

Also, if you get an error, could you post the *exact* error message?

The code should be something like this

public class SomeClass
{
private HashMap<String, AirPlane> airPlanes = new HashMap();

...

public void handleAddPlane()
{

...

airPlanes.put(planeRegisNum, plane);
}
}