[SOLVED] String conversion

[skiing]

I am trying to convert a string that is a float value to a float then add 25.00 to it and convert it back to a string. I have tried the following.

String balance = rs.getString(9);

float price = Integer.parseInt(balance);
// val = price + 25;
// String ic = Integer.toString(val)

[Fubarable]

You use Integer to parse a String to an int not a float or double. Since Integer is the wrapper class for int, what class should you use to parse a String to float?

Hint: Look in the API and you will find the class and your method.

Also, you rarely want to use float when you can use the more accurate double type.

[Eranga]

You have made few mistakes there.

        String str = "34.2";
        float val = Float.parseFloat(str);
        float newVal = val + 25.0F;
        str = String.valueOf(newVal);
        System.out.println(str);

[Fubarable]

OK, Eranga has given you the answer: to get a float from a String you need to use the Float class and parse it with a parseFloat method. I again recommend however that you not do this, but instead use Double.parseDouble(...)

[Eranga]

Yes, that's true. But there is a reason not to mentioned that in my post. Because our thread starter can confuse on float and double. Just look at his attempt. Seems no idea about wrapper classes, he's a newbie to Java. :)

[fishtoprecords]

Also, you rarely want to use float when you can use the more accurate double type.

For currency, using a double is not much more accurate than a float. And while the OP is new to Java, its never too soon to remember:

Using a float or double for money/currency is a sin.

Don't do it!

[Fubarable]

fishtoprecords is absolutely correct. I didn't see that the OP was dealing with currency here.

[Eranga]

And if I'm remember correctly, fishtoprecords took a long discussion about that in one of his past thread. Sorry if I'm wrong.

[fishtoprecords]

Prior thread:
http://www.java-forums.org/new-java/...money-sin.html

[Eranga]

I think it's better to look at our thread starter. May be even before he has to learn about basis as well.

[jhen]

can anyone give me a simple source code that demonstrates polymorphism in java?

anyone plz:o

[Fubarable]

can anyone give me a simple source code that demonstrates polymorphism in java?

anyone plz:o

Please don't hijack another thread. if you have a question, post it in its own thread.

[skiing]

It works now.

[Eranga]

can anyone give me a simple source code that demonstrates polymorphism in java?

anyone plz:o

Please don't deal with others thread, if your question is not related to. Start on separate thread in the correct sub-forum.