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

booleanisBlank(String text)
Whether the String is null, zero-length and does contain only whitespace 
if (isEmpty(text))
    return true;
for (int i = 0; i < text.length(); i++) {
    if (!Character.isWhitespace(text.charAt(i)))
        return false;
return true;
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;
booleanisNullOrEmpty(String str)
is Null Or Empty 
return str == null || str.trim().length() == 0;
booleanisEmpty(final String value)
Returns true if the string is null or 0-length. 
return value == null || value.length() == 0;
BooleanisEmpty(String s)
is Empty 
boolean flag;
if (s == null || s.length() == 0)
    flag = true;
else
    flag = false;
return Boolean.valueOf(flag);
booleanisEmpty(String value)
is Empty 
return (value == null || value.trim().length() == 0);
booleanisNotEmpty(String value)
is Not Empty 
return (!isEmpty(value));
booleanisEmptyOrNull(String string)
is Empty Or Null 
if (string == null) {
    return true;
if (string.trim().length() == 0) {
    return true;
return false;
booleanisEmpty(String input)
is Empty 
if (input == null || "".equals(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;
booleanisNotEmpty(String s)
is Not Empty 
return (s != null && s.trim().length() > 0);