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

booleanckIsEmpty(String s)
ck Is Empty 
if (s == null || s.trim().equals("") || s.trim().equals("null")) {
    return true;
return false;
BooleanisEmptyOrNull(String str)
is Empty Or Null 
if (str != null) {
    if (!str.equals("")) {
        return false;
return true;
StringfilterString(String string)
filter String 
if (isEmptyOrNull(string)) {
    return "";
return string.trim();
booleanisBlank(String s)
is Blank 
if (s == null) {
    return true;
return Pattern.matches("\\s*", s);
booleanisBlank(String str)
is Blank 
if (null == str)
    return true;
if ("".equals(str.trim()))
    return true;
return false;
booleanisBlank(EditText editText)
is Blank 
return editText == null || editText.getText() == null
        || editText.getText().toString() == null
        || editText.getText().toString().trim().equals("");
booleanisBlank(String string)
is Blank 
return string == null || string.trim().equals("");
booleanisBlank(String str)
is Blank 
return null == str || "".equals(str.toString());
booleanisBlank(String str)
is Blank 
int strLen;
if (str == null || (strLen = str.length()) == 0) {
    return true;
for (int i = 0; i < strLen; i++) {
    if ((Character.isWhitespace(str.charAt(i)) == false)) {
        return false;
return true;
booleanisNotBlank(String str)
is Not Blank 
return !StringUtil.isBlank(str);