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Thread: disabling keys

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    Default disabling keys

    hen user press can key than the code below gets the key user just pressed. the problem is that i want to only limit user to press alphabet and numbers. so i want to disable weird char ex left, right, up, @,$,!,%..... as you can see this will take up alot of if statments. is there better way to do this?

    if(keys == KeyEvent.VK_SHIFT || keys == KeyEvent.VK_CAPS_LOCK || keys ==KeyEvent.VK_LEFT ||
       keys ==KeyEvent.VK_RIGHT || keys ==KeyEvent.VK_DOWN || keys ==KeyEvent.VK_UP   .....)  //more button to disable
    {
    }
    else{  //store the char in array			
    	username[z] = e.getKeyChar();
    	z++;
    }


  2. #2
    Super Moderator Norm's Avatar
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    Default Re: disabling keys

    Use a Collection to hold the keys to be ignored and use one of the collection's methods to see if the key just pressed is in the collection.
    If you don't understand my answer, don't ignore it, ask a question.

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    Super Moderator Norm's Avatar
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    Default Re: disabling keys

    Also posted at Disabling keys - Dev Shed

    Are the desired keys values contiguous Ie in a range? for example a-z and A-Z.
    Then a simple range test would select them.
    If you don't understand my answer, don't ignore it, ask a question.

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    Super Moderator Norm's Avatar
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    Default Re: disabling keys

    Also posted at disabling keys - Java
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: disabling keys

    and.....

    come to think of it arent you also NormR?

    posting same answer at Disabling keys - Dev Shed

    also anser can be found at http://bytes.com/topic/java/answers/...ys#post3749288

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