Android Utililty Methods String Empty Check

List of utility methods to do String Empty Check

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Description

The list of methods to do String Empty Check are organized into topic(s).

Method

StringtrimToEmpty(String str)
trim To Empty 
return isBlank(str) ? EMPTY : trim(str);
booleanisEmpty(String string)
is Empty 
if (string == null || string.trim().equals("")) {
    return true;
} else {
    return false;
booleanisEmptyString(String str)
is Empty String 
return str == null || str.trim().equals("");
booleanisEmptyString(String str)
is Empty String 
if (str == null || str.equals("")) {
    return true;
return false;
booleanisNullOrEmpty(CharSequence any)
CHeck to see if any is either null or empty 
return (any == null || any.length() == 0);
booleanisNullOrEmpty(String s)
is Null Or Empty 
return s == null || s.length() == 0;
booleanemptyOrNull(String str)
empty Or Null 
return str == null || str.length() == 0;
booleanemptyOrNull(String... arrStr)
empty Or Null 
for (String str : arrStr) {
    if (emptyOrNull(str)) {
        return true;
return false;
booleanisBlank(String str)
is Blank 
return str == null || str.trim().length() == 0;
booleanisEmpty(String input)
is Empty 
if (input == null || "".equals(input))
    return true;
for (int i = 0; i < input.length(); i++) {
    char c = input.charAt(i);
    if (c != ' ' && c != '\t' && c != '\r' && c != '\n') {
        return false;
return true;