Package com.github.kaklakariada.fritzbox.helper

Class StringHelper

java.lang.Object
com.github.kaklakariada.fritzbox.helper.StringHelper
public class StringHelper extends Object

  • Method Details

    • isIntegerNumber

      public static boolean isIntegerNumber(String cs)

      Note that the method does not allow for a leading sign, either positive or negative. 

       StringUtils.isIntegerNumber(null)  = false
 StringHelper.isIntegerNumber(""))  = false
 StringHelper.isIntegerNumber(" ")  = false
 StringHelper.isIntegerNumber(" 1 ") = true
 StringHelper.isIntegerNumber("123")  = true
 StringUtils.isIntegerNumber("१२३")  = true
 StringHelper.isIntegerNumber("1.1") = false
 StringHelper.isIntegerNumber("1.1D") = false
      Parameters:
      cs - the String to check, may be null
      Returns:
      true if only contains digits or is enclosed by blanks, and is non-null

    • isNumeric

      public static boolean isNumeric(CharSequence cs)
      Code copied 'as is' from apache-commons-lang3, class StringUtils.isNumeric()

      Checks if the CharSequence contains only Unicode digits. A decimal point is not a Unicode digit and returns false.

      null will return false. An empty CharSequence (length()=0) will return false.

      Note that the method does not allow for a leading sign, either positive or negative. Also, if a String passes the numeric test, it may still generate a NumberFormatException when parsed by Integer.parseInt or Long.parseLong, e.g. if the value is outside the range for int or long respectively. 

       StringUtils.isNumeric(null)   = false
 StringUtils.isNumeric("")     = false
 StringUtils.isNumeric("  ")   = false
 StringUtils.isNumeric("123")  = true
 StringUtils.isNumeric("१२३")  = true
 StringUtils.isNumeric("12 3") = false
 StringUtils.isNumeric("ab2c") = false
 StringUtils.isNumeric("12-3") = false
 StringUtils.isNumeric("12.3") = false
 StringUtils.isNumeric("-123") = false
 StringUtils.isNumeric("+123") = false
      Parameters:
      cs - the CharSequence to check, may be null
      Returns:
      true if only contains digits, and is non-null

    • isEmpty

      public static boolean isEmpty(CharSequence cs)
      Code copied 'as is' from apache-commons-lang3, class StringUtils.isEmpty()

      Checks if a CharSequence is empty ("") or null. 

       StringUtils.isEmpty(null)      = true
 StringUtils.isEmpty("")        = true
 StringUtils.isEmpty(" ")       = false
 StringUtils.isEmpty("bob")     = false
 StringUtils.isEmpty("  bob  ") = false
      Parameters:
      cs - the CharSequence to check, may be null
      Returns:
      true if the CharSequence is empty or null