i want to convert string into integer
i have an html file in which i m using a text box , for entering amount i m using that text box entry at next jsp. i want to convert amount string into integer for further processing. At next jsp i m using:-
String amount= request.getParameter("bal");
Integer amount1 = Integer.valueOf((String)session.getAttribute("amount"));
and in sql query i m using amount1 as:-
ResultSet rs1 = st.executeQuery("update saving set balance = balance - amount1 where saving.account_no = '" + acc +"'");
my problem is i m getting following error:-
server encountered an internal error and
exception:- numberformat exception
please help me as soon as possible
[700 byte] By [
ama_banka] at [2007-11-27 0:28:11]
# 3
try {
String enteredAmount = request.getParameter("bal");
int amount = Integer.parseInt(enteredAmount);
}
catch (NumberFormatException e){
// entered value is not a number please try again...
// forward back to the page so that the idiot user can type it in properly.
}
Most frameworks will have support for this sort of feature.
# 4
i hav used the code below in my jsp file to convert string into integer:
String enteredAmount = request.getParameter("bal");
int amount = Integer.parseInt(enteredAmount);
and i m getting followwing errors:-
1.The server encountered an internal error () that prevented it from fulfilling this request.
2.org.apache.jasper.JasperException: null
3.java.lang.NumberFormatException: null
these above problelems i m facing.....plz help me out as soon as possible.
# 6
i have used following lines in my code:-
1. String amount= request.getParameter("bal");
2. Integer amount1 = Integer.valueOf((String)session.getAttribute("amount"));
user enters any number in text box "bal"
and i want to convert that string into integer , i m using amount1 in following query:-
ResultSet rs1 = st.executeQuery("update saving set balance = balance - amount1 where saving.account_no = '" + acc +"'");
i again got the number format exception in line 2.
please suggest me wht should i do?
# 8
> i still getting number format exception in line 2:-
> String amount= request.getParameter("bal");
> Integer amount1 =
> Integer.valueOf((String)session.getAttribute("amount"
> );
> now what should i do?
Again: you just need make sure that the String value you're going to put into a Number is also really a number. That is: not null, not empty, no spaces, at least one digit and no another characters.
