Java Utililty Methods Array to String

if (array == null)
    return null;
StringBuilder sb = new StringBuilder();
for (int i = 0; i < array.length; i++) {
    sb.append(array[i]);
    if (i != array.length - 1) {
        sb.append(seperator);
return sb.toString();

StringBuilder builder = new StringBuilder();
for (String string : array) {
    if (string != null) {
        builder.append(separator).append(string);
return builder.substring(separator.length());

StringBuilder sb = new StringBuilder();
separator = (separator == null || separator.isEmpty()) ? " " : separator;
for (String str : array) {
    sb.append(str).append(separator);
return sb.toString().trim();

StringBuilder csvStringBuilder = new StringBuilder();
for (int i = 0; i < fields.length; i++) {
    if (i > 0) {
        csvStringBuilder.append(delimiter);
    csvStringBuilder.append(fields[i]);
return csvStringBuilder.toString();
...

StringBuffer sb = new StringBuffer();
for (Object obj : idArray) {
    sb.append(obj);
    sb.append(",");
sb.delete(sb.length() - 1, sb.length());
return sb.toString();

StringBuffer strList = new StringBuffer();
if (strArray != null) {
    for (int i = 0; i < strArray.length; i++) {
        if (i != 0) {
            strList.append(",");
        strList.append(strArray[i]);
return strList.toString();

StringBuilder builder = new StringBuilder();
for (byte element : objectGuid) {
    int item = element & 0xFF;
    if (item <= 0xF) {
        builder.append("0");
    builder.append(Integer.toHexString(item));
return builder.toString();

List<String> stringList = new ArrayList<>();
for (int i = 0; i < args.length; i++)
    stringList.add(args[i]);
return convertToString(stringList);

StringBuilder converted = new StringBuilder();
if (values != null) {
    for (String value : values) {
        if (converted.length() > 0) {
            converted.append(separator);
        converted.append(value);
return converted.toString();

if (a == null)
    return "null";
int bufLen = 20 * a.length;
if (a.length != 0 && bufLen <= 0)
    bufLen = Integer.MAX_VALUE;
StringBuilder buf = new StringBuilder(bufLen);
deepToString(a, buf, new HashSet<Object[]>());
return buf.toString();
...