How to be sure about Integer value of a JTextfield?

Question

I have a JTextField which users must enter a number in that.

I want to check the value to be sure that it contains an **Integer*.*

Here is the code:

JTextField Tex_amount=new JTextField();
.
.
.
String s=Tex_amount.getText(); 
int a=Integer.parseInt(s);

The problem is if the user enter a String in the field i will face with the error: java.lang.NumberFormatException. So how can i check the value?

do some validation where user can allowed only numeric from the keyboard. — subodh, Apr 05 '13 at 07:31
Here: http://stackoverflow.com/questions/11093326/restricting-jtextfield-input-to-integers for restricting input to only integers — Narendra Pathai, Apr 05 '13 at 07:33

score 7 · Answer 1 · answered Apr 05 '13 at 07:33

7

there are three ways

answered Apr 05 '13 at 07:33

mKorbel

score 3 · Accepted Answer · answered Apr 05 '13 at 07:33

3

You can use try..catch

try{
    int a = Integer.parseInt(s);
}
catch(ArithmeticException e){
    //Handel error here 
}

answered Apr 05 '13 at 07:33

commit

2 Answers2