Pan Card Validierung in Android

Question

Ich muss Validierung wie folgt zu erreichen.

sollte genau 5 Buchstaben in Large Caps, gefolgt von genau 4 Ziffern, gefolgt von 1 Brief in Large Caps (Beispiel - KLMNO5661P)

Answer 1

können Sie REGEX (Regular Expression) Verwenden Sie das Format

String s = "ABCDE1234F"; // get your editext value here 
Pattern pattern = Pattern.compile("[A-Z]{5}[0-9]{4}[A-Z]{1}"); 

Matcher matcher = pattern.matcher(s); 
// Check if pattern matches 
if (matcher.matches()) { 
    Log.i("Matching","Yes"); 
} 

[A-Z]{5} - match five literals which can be A to Z 
[0-9]{4} - followed by 4 numbers 0 to 9 
[A-Z]{1} - followed by one literal which can A to Z 

zu überprüfen

Answer 2

Versuchen Sie, diese

final String pan_pattern = "(([A-Za-z]{5})([0-9]{4})([a-zA-Z]))"; 

checkpan.setOnClickListener(new View.OnClickListener() { 
    @Override 
    public void onClick(View v) { 

     Pattern r = Pattern.compile(pan_pattern); 
     if (!regex_matcher(r, pan_number.getText().toString())) { 
      error = "Invalid PAN number"; 
     } 
    } 
}); 

regex_matcher

private boolean regex_matcher(Pattern pattern, String string) { 
    Matcher m = pattern.matcher(string); 
    return m.find() && (m.group(0) != null); 
} 

Answer 3

versuchen diese

public String validateNewPancard(String pan){ 
    StringBuilder retVal = new StringBuilder(); 

    if(pan.length() < 1){ 
     return "Empty fields"; 
    } 

    if (pan != null) { 

      boolean hasUppercase = !pan.equals(pan.toLowerCase()); 
      boolean hasLowercase = !pan.equals(pan.toUpperCase()); 
      boolean hasNumber = pan.matches(".*\\d.*"); 
      boolean noSpecialChar = pan.matches("[a-zA-Z0-9 ]*"); 

      if (hasUppercase && hasLowercase && hasNumber && pan.length) { 

       return "success"; 
      } 

      if (pan.length() < 5) { 

       retVal.append("Pancard is too short. Needs to have 5 characters <br>"); 
      } 

      if (!hasUppercase) { 

       retVal.append("Pancard needs an upper case "); 
      } 

      if (!hasLowercase) { 

       retVal.append("Pancard needs a lowercase"); 
      } 

      if (!hasNumber) { 

       retVal.append("Pancard needs a number"); 
      } 


     }else{ 

      retVal.append("Pancard don't match"); 
     } 
    }else{ 

     return "Pancard Null"; 
    } 

    if(retVal.length() == 0){ 

     retVal.append("Success"); 
    } 

    return retVal.toString(); 
}