Programming Forums > Application Development > Java

titaniumdecoy · Feb 13th, 2008, 12:52 PM

Quote:

Originally Posted by pushkarajthorat

You mis-located the change..

} while (((increase < 0) || (increase > 105)) || increase.getClass().getName().equals("java.lang.Integer);

Actually, I understood you just fine. You, however, completely ignored my point.

I really don't think I can make this much clearer.

Scanner.readInt() will either return an int or throw an exception.

pushkarajthorat · Feb 14th, 2008, 2:01 AM

@itgalary

Yes. It can also be used..
Its better option than <objectname>.class()
because to invoke func. we have to be sure that <objectname> should not be null.

mrynit · Feb 14th, 2008, 3:48 AM

http://java.sun.com/javase/6/docs/ap...html#nextInt()
do a try catch on it.

pushkarajthorat · Feb 14th, 2008, 5:42 AM

Quote:

Originally Posted by titaniumdecoy

Assuming the increase variable in the code you posted is a Scanner, you can either use the hasNextInt() method to determine if the data waiting to be read can be interpreted as an int value, or catch an exception.

You are assuming that the code is of class Scanner.. On the first look i thought of a object reference instead of premetive type.

titaniumdecoy · Feb 14th, 2008, 1:08 PM

@pushkarajthorat: First of all, the code you posted which unnecessarily checks that variable is of type Integer contains a logic error: the second logical OR should be a logical AND.

Quote:

Originally Posted by pushkarajthorat

You are assuming that the code is of class Scanner.. On the first look i thought of a object reference instead of premetive type.

You argue that the aforementioned check is necessary if the OP is using an imaginary class which implements a method named readInt() which (oddly enough) returns an Object which might be an Integer or a Double or another non-primitive type. Why would a method with that name return anything other than an int (the most sensible possibility--especially since it is in all likelihood an instance of Scanner) or an Integer? Either possibility would obviate the need for such a check.

pushkarajthorat · Feb 14th, 2008, 11:41 PM

@titaniumdecoy

Feb 14th, 2008, 2:01 AM	#12
pushkarajthorat Java Developer Join Date: Jun 2006 Location: Solapur, India. Posts: 22 Rep Power: 0	Re: How to compare variable types in Java @itgalary Yes. It can also be used.. Its better option than <objectname>.class() because to invoke func. we have to be sure that <objectname> should not be null. __________________ [Pushkaraj] Imagination is more important than knowledge � Albert Einstein

Feb 14th, 2008, 3:48 AM	#13
mrynit Hobbyist Programmer Join Date: Mar 2006 Location: olympia,WA Posts: 332 Rep Power: 3	Re: How to compare variable types in Java http://java.sun.com/javase/6/docs/ap...html#nextInt() do a try catch on it. __________________ i dont know much about programming but i try to help

Feb 14th, 2008, 11:41 PM	#16
pushkarajthorat Java Developer Join Date: Jun 2006 Location: Solapur, India. Posts: 22 Rep Power: 0	Re: How to compare variable types in Java @titaniumdecoy __________________ [Pushkaraj] Imagination is more important than knowledge � Albert Einstein

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Programming Forums > Application Development > Java

How to compare variable types in Java