Solved

A Question About Insert

Posted on 1998-09-03
6
164 Views
Last Modified: 2010-03-30
This question is 40 points, not 20 points.
I have a big registration form. I wrote myTextField extending TextField
in order to make sure that there are no problem in doing INSERT and UPDATE
when the user just inputs some of these text fields. The following piece of
code getText() in myTextField is OK for value of data type "Text" in database, but for
the value of data type "Number" in database will cause syntax error. I need a correct
function getText().
For example:
query = "UPDATE regist " +
        "SET lastName = '" + txtlastName + "'," +
        "TotalBal = " + txtTotalBal.getText() +
        " WHERE bibNo = 100 ";    
If the text fields are blank, the query is:
UPDATE regist SET lastName = '',TotalBal =  WHERE bibNo = 100
The value of TotalBal should be 0, not empty.                                  


public String getText()
{
     String s = super.getText();
     if(s == null) return new String();
     return s;
}
0
Comment
Question by:Jun080298
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
6 Comments
 

Author Comment

by:Jun080298
ID: 1223493
Edited text of question
0
 
LVL 8

Expert Comment

by:diakov
ID: 1223494
Change
txtTotalBal.getText()
to
(txtTotalBal.getText().equals(""))?"0":txtTotalBal.getText()
0
 

Author Comment

by:Jun080298
ID: 1223495
Hi, diakov.
I got an error message after changing the code
from
      txtTotalBal.getText()
to
    (txtTotalBal.getText().equals(""))?"0":txtTotalBal.getText()

"Incompatible type for ?: Can't convert java.lang.String to boolean"
0
Salesforce Has Never Been Easier

Improve and reinforce salesforce training & adoption using WalkMe's digital adoption platform. Start saving on costly employee training by creating fast intuitive Walk-Thrus for Salesforce. Claim your Free Account Now

 

Expert Comment

by:pureDan
ID: 1223496
U 've got to test if the txtTotalBal is empty or not  .
It isn't necessary to overwrite getText() method.
Just a simple test like the next one :
   if(txtTotalBal.getText().equals(""))  txtTotalBal.setText("0");
                  else txtTotalBal.getText();

0
 
LVL 8

Accepted Solution

by:
diakov earned 20 total points
ID: 1223497
Sorry for the inconvenience. You need also some additional brackets:
from
txtTotalBal.getText()
to
( (txtTotalBal.getText().equals(""))?"0":txtTotalBal.getText() )
0
 
LVL 7

Expert Comment

by:linda101698
ID: 1223498
pureDan,
Jun requested I award you points for your help.  See the question posted in this topic area for you to answer to receive points.

Linda Gardner
Customer Service @ Experts Exchange.


0

Featured Post

Enroll in June's Course of the Month

June's Course of the Month is now available! Every 10 seconds, a consumer gets hit with ransomware. Refresh your knowledge of ransomware best practices by enrolling in this month's complimentary course for Premium Members, Team Accounts, and Qualified Experts.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

An old method to applying the Singleton pattern in your Java code is to check if a static instance, defined in the same class that needs to be instantiated once and only once, is null and then create a new instance; otherwise, the pre-existing insta…
For beginner Java programmers or at least those new to the Eclipse IDE, the following tutorial will show some (four) ways in which you can import your Java projects to your Eclipse workbench. Introduction While learning Java can be done with…
Viewers learn about the “for” loop and how it works in Java. By comparing it to the while loop learned before, viewers can make the transition easily. You will learn about the formatting of the for loop as we write a program that prints even numbers…
Viewers will learn about arithmetic and Boolean expressions in Java and the logical operators used to create Boolean expressions. We will cover the symbols used for arithmetic expressions and define each logical operator and how to use them in Boole…

734 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question