Java Utililty Methods String Format

Formatter createFormatter()
create Formatter

return new Formatter() {
 final MessageFormat messageFormat = new MessageFormat("{0}{1,date,HH:mm:ss} {2} - {3}{4}\n");
 @Override
 public synchronized String format(LogRecord record) {
 Object[] arguments = new Object[] { String.format("%-8s", record.getLevel()),
 new Date(record.getMillis()),
 record.getLoggerName() == null ? "<Unknown Logger>"
 : record.getLoggerName().substring(record.getLoggerName().lastIndexOf('.') + 1),
...

String format(final String message, final Object... args)
format

try {
 for (int i = 0; i < args.length; i++) {
 final Object o = args[i];
 if (o != null && o.getClass().isArray()) {
 args[i] = Arrays.asList((Object[]) o);
 return String.format(message, args);
...

String format(final String s, final int width, final int intend)
format

final String ws = ws(intend);
if (s.length() < width - intend)
 return ws + s;
final StringBuilder buf = new StringBuilder();
int pos = 0;
while (pos + width - intend < s.length()) {
 buf.append(ws).append(s.substring(pos, pos + width - intend)).append("\n");
 pos += width - intend;
...

String format(String longMessage, int charPerLine, int paddingLeft, boolean padFirstLine)
Format long message in multiple line in such a way that each line does not contain more charPerLine .

char[] padChar = new char[paddingLeft];
longMessage = longMessage.replaceAll("<[/]*[a-zA-Z]+>", "");
Arrays.fill(padChar, ' ');
StringBuilder builder = new StringBuilder();
if (padFirstLine) {
 builder.append(padChar);
String[] parts = longMessage.split(" ");
...

String format(String name, char separator)
format

StringBuffer result = new StringBuffer();
for (Iterator<String> i = parseName(name, '_').iterator(); i.hasNext();) {
 String component = i.next();
 result.append(component);
 if (i.hasNext() && component.length() > 1) {
 result.append(separator);
return result.toString();

String format(String name, char separator, String prefix, boolean includePrefix, boolean includeLeadingSeparator)
Formats a name by parsing it into words separated by underscores and/or mixed-casing and then recombining them using the specified separator.

String leadingSeparators = includeLeadingSeparator ? getLeadingSeparators(name, '_') : null;
if (leadingSeparators != null) {
 name = name.substring(leadingSeparators.length());
List<String> parsedName = new ArrayList<String>();
if (prefix != null && name.startsWith(prefix) && name.length() > prefix.length()
 && Character.isUpperCase(name.charAt(prefix.length()))) {
 name = name.substring(prefix.length());
...

String format(String s)
format

String[] fullNameSplit = s.split("_| ");
List<String> fullNameList = new ArrayList<String>();
for (String f : fullNameSplit) {
 fullNameList.add(f);
String name = "";
for (String f : fullNameList) {
 name = name + f.replace(f.substring(1), f.substring(1).toLowerCase());
...

String format(String source, String placeholder, Object... objs)
format

for (int idx = 0; idx < objs.length; idx++) {
 if (source.contains(placeholder + idx) && objs[idx] != null) {
 source = source.replace(placeholder + idx, objs[idx].toString());
return source;

String format(String string)
format String , for example: 1,2,3,4,6,8 ====> 1-4,6,8.

if (string == null || string.trim().length() == 0 || string.equals("*")) { 
 return string;
String delimiter = ","; 
List<StringBuffer> sections = new ArrayList<StringBuffer>();
String[] days = string.split(delimiter);
String tempDay = null;
for (int i = 0; i < days.length; i++) {
...

String formatCommand(String cmd)
Format the specified command line.

if (cmd == null) {
 return null;
cmd = cmd.replaceFirst(" <defunct>", "");
if (cmd.matches("\\[.+\\]")) {
 cmd = cmd.substring(1, cmd.length() - 1);
String[] tokens = cmd.trim().split("\\s+");
...