Java Utililty Methods String Empty to Null

String emptyStringToNull(String input)
empty String To Null

if (input.trim().equals("")) {
 return null;
} else {
 return input.trim();

String emptyStringToNull(String str)
empty String To Null

return str == null || str.equals("") ? null : str;

String emptyStringToNull(String string)
Returns null, if the specified string is null or the empty string.

return isEmptyOrNull(string) ? null : string;

String emptyToDefault(String value, String def)
empty To Default

return (value == null || value.length() == 0) ? def : value;

T[] emptyToDefault(T[] values, T[] def)
empty To Default

return values == null || values.length == 0 ? def : values;

String emptyToNull(final String text, final boolean doTrim)
Returns null if a string variable is empty.

if (doTrim && (text != null)) {
 return ("".equals(text.trim())) ? null : text;
} else {
 return ("".equals(text)) ? null : text;

String emptyToNull(String field)
empty To Null

return "".equals(field) ? null : field;

String emptyToNull(String s)
empty To Null

if (s == null || s.length() == 0)
 return null;
String trimmed = trim(s);
return (trimmed.length() != 0 ? s : null);

String emptyToNull(String s)
Converts a 0-length string to null, leaves the string as is otherwise.

if (s == null)
 return null;
return s.length() == 0 ? null : s;

String emptyToNull(String str)
Returns the given string if it is nonempty; null otherwise.

return (str == null || str.length() == 0) ? null : str;