How to avaoid java.lang.IllegalArgumentException: No enum const class

Question

HI ,
Iam getting java.lang.IllegalArgumentException when iam using switch case through Enum contants.
//Enum Constants declaration
public enum USEOFPROCEEDSVALUES { U1,U2,U3, U4}
//Using Enum in Java class
Test.java
USEOFPROCEEDSVALUES useOfProceedsVar =USEOFPROCEEDSVALUES.valueOf(useOfproceeds);
switch (useOfProceedsVar) {   
               case U1:
               revenueSourceCode="REVENUE_SOURCE_CODE.POWER";
                    break;
               case U2:
                    revenueSourceCode="REVENUE _SOURCE_CODE.WATER";
               break;
               case U3:
                    revenueSourceCode="REVENUE_SOURCE_CODE.POWER";
                    break;
               case U4:
                         revenueSourceCode=REVENUE_SOURCE_CODE.POWER";
                    break;
default:
                    revenueSourceCode=null;
Exception raising if there is either of these not U1,U2,U3,U4 ara not avalabele. i.e is if useOfProceedsVar is A6 then exception raising
How to avoid this exception
Thanks for early reply

Answer 1

user818909 wrote:
HI ,
Iam getting java.lang.IllegalArgumentException when iam using switch case through Enum contants.
//Enum Constants declaration
public enum USEOFPROCEEDSVALUES { U1,U2,U3, U4}
//Using Enum in Java class
Exception raising if there is either of these not U1,U2,U3,U4 ara not avalabele. i.e is if useOfProceedsVar is A6 then exception raisingActually useOfProceedsVar can never be A6, it can only take a value from the enum.
The exception will be raised by valueOf, which (quite correctly) throws it if the String you pass to it doesn't match any of the enum constants.
>
How to avoid this exception
Don't avoid it, process it. What do you want your code to do if the string doesn't match any of your enum constants? Whatever it is, stick it in a catch clause.