java.lang.Object
- kernpruefung.bnz.util.CheckMethods

```
public class CheckMethods
extends Object
```
The class CheckMethods contains all (static) methods to check the rules from the specifications.

This class is a static class without a public c'tor.

Version:

1.0

Author:

Frank Zimmermann (LSV Spitzenverband)

Field Summary

Fields
Modifier and Type	Field	Description
`static int`	`BETRIEBSNUMMER`
`static int`	`BETRIEBSNUMMER0`
`static int`	`STICHJAHR`
`static int`	`ZAHLSTELLENNUMMER`
`static int`	`ZAHLSTELLENNUMMER0`

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static boolean`	`hasCorrectAtChar(String testString)`	Checks if exactly one @ or § is in `testString` and whether it is not in first or last position.
`static boolean`	`hasForeignLDKZ(String testLDKZ)`	Checks if `testLDKZ` is a valid LDKZ (see DEÜV Anlage 8)
`static boolean`	`hasHomePLZ(String testPLZ)`	Checks if `testPLZ` is a valid home PLZ between 01000 ... 99999
`static boolean`	`hasPLZCharsItl(String testPLZ)`	Checks if `testPLZ` has valid Itl PLZ chars
`static boolean`	`hasValidEmailCharacters(String testString)`	Checks if `testString` contains only valid email characters.
`static boolean`	`isANDefaultValue(String testString)`	Checks if `testString` has only the defaultValue (string field: all spaces)
`static boolean`	`isCheckDigit(String testString, int p)`	Checks if the `testString` is a valid Zahlstellennummer or Betriebsnummer. The format of the testString must be 8 digits followed by 7 spaces and hence sums up to a total of 15 characters.
`static boolean`	`isConstantString(String testString, String constant)`	Checks if first argument (`testString`) is equal to the second argument (the constant) and if `testString` is not `NULL` or empty.
`static boolean`	`isDate(String testDate)`	Checks if `testDate` is a valid date.
`static boolean`	`isDate0000(String testDate)`	Checks if `testDate` is a valid date and jhjj<2009 or jhjj<2009 and mmtt="0000".
`static boolean`	`isDate1LaterDate2(String testDate1, String testDate2)`	Checks if `testDate1` is later than `testDate2`.
`static boolean`	`isDate1NotLaterDate2PlusXMonths(String testDate1, String testDate2, int months)`	Checks if `testDate1` is not later than end of month from `testDate2` plus `months`.
`static boolean`	`isDateNotLaterToday(String testDate)`	Checks if `testDate` is not later than current date.
`static boolean`	`isEmptyOrNull(String testString)`	Checks if `testString` contains only spaces or is `NULL` or is an empty string.
`static boolean`	`isInCharSet(char testChar, String charSet)`	Checks if `ch` is member of the charSet given as a string `charSet`
`static boolean`	`isNDefaultValue(String testString)`	Checks if `testString` has only the defaultValue (numeric field: all Zeros)
`static boolean`	`isNumeric(String testString)`	Checks if `testString` contains only digits.
`static boolean`	`isTime(String testTime)`	Checks if `testTime` is a valid time value.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - ZAHLSTELLENNUMMER0
```
public static final int ZAHLSTELLENNUMMER0
```
    See Also:
    
    Constant Field Values
  - ZAHLSTELLENNUMMER
```
public static final int ZAHLSTELLENNUMMER
```
    See Also:
    
    Constant Field Values
  - BETRIEBSNUMMER
```
public static final int BETRIEBSNUMMER
```
    See Also:
    
    Constant Field Values
  - BETRIEBSNUMMER0
```
public static final int BETRIEBSNUMMER0
```
    See Also:
    
    Constant Field Values
  - STICHJAHR
```
public static final int STICHJAHR
```
    See Also:
    
    Constant Field Values
- Method Detail
  - isEmptyOrNull
```
public static boolean isEmptyOrNull(String testString)
```
    Checks if testString contains only spaces or is NULL or is an empty string.
    CheckMethods.isEmptyOrNull( null ) == true CheckMethods.isEmptyOrNull( "" ) == true CheckMethods.isEmptyOrNull( " " ) == true CheckMethods.isEmptyOrNull( " " ) == true CheckMethods.isEmptyOrNull( " x a " ) == false CheckMethods.isEmptyOrNull( "abc " ) == false
    Parameters:
    
    testString - string that is checked
    
    Returns:
    
    true if testString contains only spaces or is NULL or is an empty string and false otherwise.
  - isNumeric
```
public static boolean isNumeric(String testString)
```
    Checks if testString contains only digits.
    CheckMethods.isNumeric( null ) == false CheckMethods.isNumeric( "" ) == false CheckMethods.isNumeric( " " ) == false CheckMethods.isNumeric( "12345" ) == true CheckMethods.isNumeric( "1x2a5" ) == false CheckMethods.isNumeric( "1 234" ) == false
    Parameters:
    
    testString - string that is checked
    
    Returns:
    
    true if testString contains only digits, false otherwise.
  - isDate
```
public static boolean isDate(String testDate)
```
    Checks if testDate is a valid date.
    
    Parameters:
    
    testDate - string that is checked (format: jhjjmmtt)
    
    Returns:
    
    true if testDate is a valid date, false otherwise.
  - isDate0000
```
public static boolean isDate0000(String testDate)
```
    Checks if testDate is a valid date and jhjj<2009 or jhjj<2009 and mmtt="0000".
    
    Parameters:
    
    testDate - string that is checked (format: jhjjmmtt)
    
    Returns:
    
    true if testDate is a valid date and jhjj<2009 or jhjj<2009 and mmtt="0000", false otherwise.
  - isDateNotLaterToday
```
public static boolean isDateNotLaterToday(String testDate)
```
    Checks if testDate is not later than current date.
    
    Parameters:
    
    testDate - string that is checked (format: jhjjmmtt)
    
    Returns:
    
    true if testDate is not later than current date.
  - isTime
```
public static boolean isTime(String testTime)
```
    Checks if testTime is a valid time value.
    hh >= 00 and hh <= 23 mm >= 00 and mm <= 59 ss >= 00 and ss <= 59
    Parameters:
    
    testTime - string that is checked (format: hhmmss)
    
    Returns:
    
    true if testTime is a valid time value, false otherwise.
  - hasValidEmailCharacters
```
public static boolean hasValidEmailCharacters(String testString)
```
    Checks if testString contains only valid email characters.
    
    Parameters:
    
    testString - string that is checked
    
    Returns:
    
    true if testString contains only valid email characters.
  - hasCorrectAtChar
```
public static boolean hasCorrectAtChar(String testString)
```
    Checks if exactly one @ or § is in testString and whether it is not in first or last position.
    
    Parameters:
    
    testString - string that is checked
    
    Returns:
    
    true if exactly one @ or § is in testString and is not in first or last position, false otherwise.
  - isCheckDigit
```
public static boolean isCheckDigit(String testString,
                                   int p)
```
    Checks if the testString is a valid Zahlstellennummer or Betriebsnummer.
    The format of the testString must be 8 digits followed by 7 spaces and hence sums up to a total of 15 characters.
    An obligate parameter specifies the check:
    param=ZAHLSTELLENNUMMER : Checks if the first 3 positions are resp. 106, 107 or 108 and if the 8. digit is a valid check digit following spec DEÜV 1.3.2.2 . param=BETRIEBSNUMMER : Checks if the first 3 positions are in the range 001 to 099 or greater than 110 and if the 8. digit is a valid check digit following spec DEÜV 1.3.2.2 .
    The check digit is specified as followed (1.3.2.2 of DEÜV):
    
    The digits of Betriebsnummer (pos 1 to 7) beginning from left are multiplied with the factors 1,2,1,2,1,2,1..
    
    From each of this product the sum of the digits is calculated.
    
    These 7 sums are added.
    
    The sum is divided by 10.
    
    The remainder is the check digit.
    
    An alternative check digit is the original check digit plus 5. If this alternative check digit is greater than 9 the last digit is the alternative check digit.
    Example: 87661207 ==> pos : 1 2 3 4 5 6 7 8 (pos 8 = check digit) ======== Digit : 8 7 6 6 1 2 0 7 factor 1-7: 1 2 1 2 1 2 1 +--Calculation--------------------------------------------------------+ ! weighted sum: 8 14 6 12 1 4 0 ! ! sum of digits: 8 5 6 3 1 4 0 ! ! sum: 27 ! ! remainder from division by 10: 7 <--check digit ! !alternative check digit: ! ! check digit + 5: 12 ! ! last digit: 2 <--alternative check digit ! ! ! ! result: valid check digit is : 7 or 2 ! +---------------------------------------------------------------------+
    Parameters:
    
    testString - testString
    
    p - specifies the test variant
    
    Returns:
    
    true if testString is a valid Betriebsnummer or Zahlstellennummer
  - isConstantString
```
public static boolean isConstantString(String testString,
                                       String constant)
```
    Checks if first argument (testString) is equal to the second argument (the constant) and if testString is not NULL or empty.
    
    Parameters:
    
    testString - test string that is compared with constant
    
    constant - the constant for that the check is performed
    
    Returns:
    
    true if testString is equal to the constant, otherwise false
  - isInCharSet
```
public static boolean isInCharSet(char testChar,
                                  String charSet)
```
    Checks if ch is member of the charSet given as a string charSet
    
    Parameters:
    
    testChar - character to be checked
    
    charSet - character set to be checked against
    
    Returns:
    
    true if charSet contains the testChar, false otherwise
  - isDate1LaterDate2
```
public static boolean isDate1LaterDate2(String testDate1,
                                        String testDate2)
```
    Checks if testDate1 is later than testDate2. If testDate1 or testDate2 is NULL it is replaced with current Date
    
    Parameters:
    
    testDate1 - (Format: jhjjmmtt)
    
    testDate2 - (Format: jhjjmmtt)
    
    Returns:
    
    true if testDate1 is later than testDate2, otherwise false
  - isDate1NotLaterDate2PlusXMonths
```
public static boolean isDate1NotLaterDate2PlusXMonths(String testDate1,
                                                      String testDate2,
                                                      int months)
```
    Checks if testDate1 is not later than end of month from testDate2 plus months. If testDate1 or testDate2 is NULL it is replaced with current Date
    
    Parameters:
    
    testDate1 - (Format: jhjjmmtt)
    
    testDate2 - (Format: jhjjmmtt)
    
    months - number of months to add to testDate2 before comparing to testDate1
    
    Returns:
    
    true if testDate1 is not later than end of month from testDate2 plus months, otherwise false
  - isNDefaultValue
```
public static boolean isNDefaultValue(String testString)
```
    Checks if testString has only the defaultValue (numeric field: all Zeros)
    
    Parameters:
    
    testString - numeric string to be checked
    
    Returns:
    
    true if testString has only the defaultValue (numeric field:all Zeros), otherwise false
  - isANDefaultValue
```
public static boolean isANDefaultValue(String testString)
```
    Checks if testString has only the defaultValue (string field: all spaces)
    
    Parameters:
    
    testString - alphanumeric string to be checked
    
    Returns:
    
    true if testString has only the defaultValue (string field: all spaces), otherwise false
  - hasForeignLDKZ
```
public static boolean hasForeignLDKZ(String testLDKZ)
```
    Checks if testLDKZ is a valid LDKZ (see DEÜV Anlage 8)
    CheckMethods.hasForeignLDKZ( "" ) == false CheckMethods.hasForeignLDKZ( " " ) == false CheckMethods.hasForeignLDKZ( "BHT" ) == true CheckMethods.hasForeignLDKZ( "IRL" ) == true CheckMethods.hasForeignLDKZ( "xxx" ) == false CheckMethods.hasForeignLDKZ( " L " ) == false
    Parameters:
    
    testLDKZ - LDKZ that is to be tested (LDKZ is short for: Länderkennzeichen)
    
    Returns:
    
    true if testLDKZ is a valid LDKZ, false otherwise
  - hasHomePLZ
```
public static boolean hasHomePLZ(String testPLZ)
```
    Checks if testPLZ is a valid home PLZ between 01000 ... 99999
    CheckMethods.hasHomePLZ( "" ) == false CheckMethods.hasHomePLZ( " " ) == false CheckMethods.hasHomePLZ( "01000 " ) == true CheckMethods.hasHomePLZ( "44866 " ) == true CheckMethods.hasHomePLZ( "00010 " ) == false CheckMethods.hasHomePLZ( " 44866 " ) == false
    Parameters:
    
    testPLZ - postalcode that is to be tested (PLZ is short for: Postleitzahl/postalcode)
    
    Returns:
    
    true if testPLZ is a valid home PLZ, false otherwise
  - hasPLZCharsItl
```
public static boolean hasPLZCharsItl(String testPLZ)
```
    Checks if testPLZ has valid Itl PLZ chars
    
    Parameters:
    
    testPLZ - postalcode that is to be tested (PLZ is short for: Postleitzahl/postalcode)
    
    Returns:
    
    true if testPLZ has valid Itl PLZ chars, false otherwise

Class CheckMethods

Field Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

ZAHLSTELLENNUMMER0

ZAHLSTELLENNUMMER

BETRIEBSNUMMER

BETRIEBSNUMMER0

STICHJAHR

Method Detail

isEmptyOrNull

isNumeric

isDate

isDate0000

isDateNotLaterToday

isTime

hasValidEmailCharacters

hasCorrectAtChar

isCheckDigit

isConstantString

isInCharSet

isDate1LaterDate2

isDate1NotLaterDate2PlusXMonths

isNDefaultValue

isANDefaultValue

hasForeignLDKZ

hasHomePLZ

hasPLZCharsItl