Looks Simple But I Cant Get It Right. Help!

**Kuttappu** · 02-09-2012, 10:56 AM

I was doing code for a simple calculator when i came across this problem..

i have a JTextField named textfield_1

i used the code : textfield_1.setText(textfield_1.getText()+"9");
output : 239 //23 was already present in the textfield

the problem was when i used this code : textfield_1.setText(textfield_1.getText()+".");
output : .239
//Here is the problem //the decimal point should come after the number ie. 239.

if i again use the 1st code ie. textfield_1.setText(textfield_1.getText()+"9");
output : 239.9 //So mathematically there are no errors, but the display of 2nd code is the problem

Can Any1 tell me the reason for that??
And how to correct that display??

**JosAH** · 02-09-2012, 11:09 AM

Maybe it's just a visibility problem; try to change the dot "." to a "X" for testing purposes.

kind regards,

Jos

**DarrylBurke** · 02-09-2012, 12:03 PM

Originally Posted by JosAH

Maybe it's just a visibility problem

Yeah, that lime green hurts the eyes and is barely legible

db

**Kuttappu** · 02-09-2012, 12:32 PM

Originally Posted by JosAH

Maybe it's just a visibility problem; try to change the dot "." to a "X" for testing purposes.

kind regards,

Jos

Thanks a lot for replying

The problem is with "." only. All other numbers come perfect.. I also tried concat().. same result..
Is there any problem or bug when "." comes as last character in setText function?

**Kuttappu** · 02-09-2012, 12:34 PM

Originally Posted by DarrylBurke

Yeah, that lime green hurts the eyes and is barely legible

db

ok ok.. i changed the color..

**Tolls** · 02-09-2012, 12:46 PM

That's not a great improvement...What's wrong with simply bolding it?

**Kuttappu** · 02-09-2012, 12:55 PM

Originally Posted by Tolls

That's not a great improvement...What's wrong with simply bolding it?

I never thought of that. Thank you..

**Kuttappu** · 02-09-2012, 01:02 PM

Moderator, should this be moved to Advanced? Though it looks simple many, including a teacher of mine couldn't answer this.

**Tolls** · 02-09-2012, 01:54 PM

Print out the value of textField.getText() before appending.
Then append the "." into a holding String and print that out.
Then pass that holding String to the setText() method.

Actually, prior to doing that, print out the value of getText() after doing your current code, so you can see what the code is actually holding.

**DarrylBurke** · 02-09-2012, 09:53 PM

Originally Posted by Kuttappu

Moderator, should this be moved to Advanced? Though it looks simple many, including a teacher of mine couldn't answer this.

Nothing advanced about it, but the question is related to Swing so I'll move it to a more appropriate forum.

To get better help sooner, post a SSCCE (Short, Self Contained, Compilable and Executable) example that demonstrates the problem. And note that the first 'S' stands for short.

db