CODEWITHSUNDEEP
java
Sara
Sara

Reputation: 3

How to Ignore Case on Key Input in Java

I am trying to check if the user typed the y key, but I want it to be lowercase. I don't know how to check that. I am using if (e.getKeyCode()==KeyEvent.VK_Y), but I need the y key to be lowercase, when it is capital it is messing up my code.

Upvotes: 0

Views: 392

Answers (4)

Oleg Cherednik
Oleg Cherednik

Reputation: 18255

if (e.getKeyCode() == 'y') {
    //...
}

Upvotes: 0

Arcaniaco
Arcaniaco

Reputation: 420

The method getKeyCode() happens to return the ASCII code, and the value of constant VK_Y is a integer 89 (reference). This value corresponds to char Y from ASCII table.

If you want a lowercase, use the corresponded value to y instead of constant KeyEvent.VK_Y. According the ASCII table, a integer 121 corresponds to char y.

So, you can do like:

if (e.getKeyCode() == 121)

or:

if (e.getKeyCode() == 'y')

Upvotes: 0

James Mudd
James Mudd

Reputation: 2393

Maybe try something like

KeyEvent.getKeyText(e.getKeyCode()).equalsIgnoreCase("y")

This converts the keycode to a string then compares it case insensitive.

Or if you only want to accept lowercase just equals e.g.

KeyEvent.getKeyText(e.getKeyCode()).equals("y")

Upvotes: 1

ash
ash

Reputation: 5165

getKeyCode returns the code of the key pressed, regardless of the intent or modifiers. To see if the shift modifier is applied, try using getModifiers() on the event.

Note that these key events are low-level, so making sense of the events in a more natural way is going to be more complex.

Upvotes: 2

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