Android Utililty Methods String Format

if (str == null || obj == null)
    return str;
return replace(str, "{0}", obj);

if (str == null || obj == null)
    return str;
for (int i = 0; i < obj.length; i++)
    str = replace(str, "{" + i + "}", obj[i]);
return str;

if (str == null || obj == null)
    return str;
for (int i = 0; i < obj.length; i++)
    str = replace(str, "{" + i + "}", String.valueOf(obj[i]));
return str;

if (isEmpty(str))
    return "";
if (args.length == 0)
    return str;
String result = str;
Pattern p = java.util.regex.Pattern.compile("\\{(\\d+)\\}");
Matcher m = p.matcher(str);
while (m.find()) {
...

String as[] = s.split("%s");
String s1;
if (as.length < 2) {
    s1 = s;
} else {
    StringBuilder stringbuilder = new StringBuilder();
    int i = aobj.length;
    int j = 0;
...

if (isEmptyOrNull(str))
    return "";
if (args.length == 0)
    return str;
String result = str;
Pattern p = java.util.regex.Pattern.compile("\\{(\\d+)\\}");
Matcher m = p.matcher(str);
while (m.find()) {
...

try {
    StringBuffer s = new StringBuffer();
    for (int i = 0; i < accountNo.length() - 10; i++) {
        s.append("*");
    StringBuffer sb = new StringBuffer(accountNo);
    sb.replace(6, accountNo.length() - 4, s.toString());
    return sb.toString();
...

if (number == null)
    return "0";
String fn = "0";
if (isNumber(number)) {
    DecimalFormat df = new DecimalFormat("#,##0");
    fn = df.format(Double.parseDouble(number));
return fn;
...

return DateFormat.format(inFormat, System.currentTimeMillis());

int tabs, spaces, newTabs;
char chTemp;
String strTemp, ret;
tabs = 0;
spaces = 0;
newTabs = 0;
ret = "";
for (int i = 0; i < whiteSpace.length(); i++) {
...