Java Utililty Methods Email Validate

List of utility methods to do Email Validate

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Description

The list of methods to do Email Validate are organized into topic(s).

Method

StringcleanUpEmailAddress(CharSequence address)
Strip off some spurious characters that make it harder to dedup 
return ADDRESS_CLEANUP.matcher(address).replaceAll("");
booleancontainsEmail(String chunk)
If the chunk looks like it contains an email 
if (chunk == null) {
    return false;
if (EMAIL.matcher(chunk).find()) {
    return true;
return false;
StringextractEmail(String string, StringBuffer sb)
extract Email 
Matcher emailMatcher = EMAIL.matcher(string);
String email = "";
while (emailMatcher.find()) {
    emailMatcher.appendReplacement(sb, "");
    email = emailMatcher.group(1);
emailMatcher.appendTail(sb);
return email;
...
SetextractEmailAddresses(final String text)
This method analyses a text for email addresses and returns a set of those found. 
final Set<String> addresses = new HashSet<String>();
final Pattern p = Pattern.compile(EMAIL_REG_EXP);
final Matcher m = p.matcher(text);
while (m.find()) {
    addresses.add(m.group(0));
return addresses;
Stringformat(String emails)
Parses the parameter for valid email addresses 
if (emails == null)
    return "";
StringBuilder target = new StringBuilder();
Pattern p = Pattern.compile("[,\\s|;]+");
String[] result = p.split(emails);
for (int i = 0; i < result.length; i++) {
    if (!isEmailValid(result[i]))
        continue;
...
StringgetEmail(String author)
Get email address of the author. 
Matcher emailMatcher = EMAIL_PATTERN.matcher(author);
String email = author;
if (emailMatcher.find()) {
    email = emailMatcher.group(1).trim();
return email;
StringgetEmailAddressFromDN(String dn)
get Email Address From DN 
Pattern emailPattern = Pattern.compile("Email=([^/]*)");
Matcher m = emailPattern.matcher(dn);
if (m.find()) {
    return m.group(1);
return null;
StringgetEmailListStr(String tempStr)
get Email List Str 
List<String> list = new ArrayList<String>();
String regex = "[^a-zA-Z-]To: (.+)";
Pattern ptn = Pattern.compile(regex);
Matcher mc = null;
mc = ptn.matcher(tempStr);
String temp = null;
System.out.println("\n\n------------------------------------");
while (mc.find()) {
...
ListgetEmails(String str)
get Emails 
Matcher matcher = EMALE_PATTERN.matcher(str);
List<String> list = null;
String email = null;
while (matcher.find()) {
    if (list == null) {
        list = new ArrayList<String>();
    email = matcher.group();
...
StringgetFirstEmailAddr(String s)
Returns the first email address found in the given string or null if not found. 
if (s == null) {
    return null;
if (patternEmail == null) {
    patternEmail = Pattern.compile(REGEX_EMAIL);
Matcher matcher = patternEmail.matcher(s);
if (matcher.find()) {
...