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validation using RegExp in java


padmapraveen_vasili
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hi friends..i have to validate the text box content.the text field must contain "min and max 0f 5 characters"it can take alphanumeric values alsoif it takes characters, only the first two should be allowedThe first two may be number or characterThe last 3 must be numericIe the field can take 12345 or AB123please can any one help me out the issue as soon as possiable....

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JavaScript right??? not Java :) Maybe this:

<head><script>function check(val){  if (val.length<5)alert("Too short");  else  {      var tomatch=/[A-Za-z0-9]\w{1,}[0-9]\w{2,}/          if(tomatch.test(val))        {          alert("Expression is ok")        }       else         {          alert("Expression is incorrect")        }  } }</script></head><body><input type="text" maxlength="5" id="box" /><input type="button" value="button" onclick="check(box.value)" /><body>

Blue's the regular expression expert :)

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the code is not working for this combination of input 123AB..it is accepting the above inputplease do consider this one..valid inputs are 12345, AB123,A1234,1B123the last 3 digits must be numeric...and it should not allow any special charaters.

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ok try this one :)

<head><script>function check(val){  if (val.length<5)alert("Too short");  else  {      var tomatch=/[A-Za-z0-9]\w{1,}[0-9]\d{2,}/          if(tomatch.test(val))        {          alert("Expression is ok")        }       else         {          alert("Expression is incorrect")        }  } }</script></head><body><input type="text" maxlength="5" id="box" /><input type="button" value="button" onclick="check(box.value)" /><body>

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