Java doesn't allow you to use anything other than integer (or castable
to integer) values for switch statements, so strings can't be sued.
With a switch that small, I recommend a series of if statements
String s=department.trim().toUpperCase();
if (s.equals("FAO")) rate=0.09;
else if (s.equals("CAO")) rate=0.19;
else if (s.equals("RES")) rate=0.39;
else rate=0.09;
This will do at most 3 string comparisons, which isn't all that bad.
Assuming you are just mapping values to values, you might want to use a
map/hashtable/properties object...
Example:
// scope this in the application scope
java.util.Hashtable values=new java.util.Hashtable();
values.put("CAO",new Double(0.19));
values.put("RES",new Double(0.39));
values.put("DEFAULT",new Double(0.09));
Then you can do Double d=(Double)
values.get(department.trim().toUpperCase()) to get the value.
This is usually better for larger cases, where lots of if statements
would take longer than a single hash lookup
----
Then there's an alternative way to use switches if you have more code
than just an assignment to make.
First convert all your string values to integers via a map, and switch
on the integers....
I would do this (so it's easy to read, like this)
Static final int FAO=1, CAO=2, RES=3;
Hashtable table=new Hashtable();
Table.put("FAO",new Integer(FAO));
Table.put("CAO",new Integer(CAO));
Table.put("RES",new Integer(RES));
int switchValue=-1;
Integer d=(Integer ) table.get(department.trim().toUpperCase())
if (d!=null) swtichValue=d.intValue();
switch(switchValue){
case FAO:
...
break;
...
etc...
}
-----Original Message-----
From: Ciliotta, Mario [mailto:[EMAIL PROTECTED]
Sent: Wednesday, December 29, 2004 9:55 AM
To: CF-Talk
Subject: Question for Java people on this list: Converting a CF app to
JS P
Hi,
I was wondering if someone on this might have experience using the
SWITCH statement in JSP.
I am in the process of converting a CF app to JSP (Do not ask why --
company standards for the future) and in the CF page I make use of the
<CFSWITCH> and I looked into JSP/Java and there is also a switch
statement but I cannot get it to work correctly.
Here is a CF example:
<cfswitch expression="#Trim(Department)#">
<cfcase value="FAO">
<cfset rate=".09">
</cfcase>
<cfcase value="CAO">
<cfset rate=".19">
</cfcase>
<cfcase value="RES">
<cfset rate=".39">
</cfcase>
<cfdefaultcase>
<cfset rate=".09">
</cfdefaultcase>
</cfswitch>
Does anyone know if this can be done with the SWITCh statement in JSP.
Can switch be used on strings --- I have been told yes and no by
different people but I cannot get past the problem.
Thanks
Mario
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