CODEWITHSUNDEEP
javaswingjbuttonnumeric-keypad
Adesh
Adesh

Reputation: 947

How to do a number keypad in java

I trying to figure out how to do a number keypad in java. I'm recently started using java, still have so much to learn. The following is what I came up with so far but it only returns one char at a time. Still researching this, but would really appreciate any assistance..thanks 

currentButton = (JButton)event.getSource();
itemQuantity = currentButton.getText().charAt(0) - '0';

Upvotes: 1

Views: 1720

Answers (2)

trashgod
trashgod

Reputation: 205775

It looks like you're using the button's text as the value of one digit in a number representing itemQuantity. Each time a button is pressed, you should append that button's digit to a string:

String currentString = "";
currentString += currentButton.getText();

Then you can get the numeric value as @user1804740 suggests:

itemQuantity = Integer.parseInt(currentString);

Note, you'll have to handle any NumberFormatException thrown by the conversion.

Upvotes: 3

user1804740
user1804740

Reputation: 41

Your question is a bit vague to me.

I hope Integer.parseInt("string") and/or Double.parseDouble("string") work for you.

Upvotes: 3

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