Java Utililty Methods Array to String

if (array instanceof byte[])
    return arrayToString((byte[]) array);
if (array instanceof short[])
    return arrayToString((short[]) array);
if (array instanceof int[])
    return arrayToString((int[]) array);
if (array instanceof long[])
    return arrayToString((long[]) array);
...

if (null == obj) {
    return null;
if (isArray(obj)) {
    try {
        return Arrays.deepToString((Object[]) obj);
    } catch (Exception e) {
        final String className = obj.getClass().getComponentType().getName();
...

StringBuilder sb = new StringBuilder();
for (int i = 0; i < obj.length; i++) {
    sb.append("GenericUtil: printArray: Index " + i + ": " + obj[i] + "\n");
return sb.toString();

StringBuffer buffer = new StringBuffer();
for (int i = 0; i < keys.length; i++) {
    buffer.append(keys[i]);
    if (i != keys.length - 1) {
        buffer.append(",");
return buffer.toString();
...

if (objects == null)
    return "";
StringBuilder sb = new StringBuilder();
for (Object o : objects) {
    sb.append(o).append(", ");
if (sb.length() <= 2) {
    return "";
...

if (a == null)
    return "null";
int iMax = a.length - 1;
if (iMax == -1)
    return "";
StringBuilder b = new StringBuilder();
for (int i = 0;; i++) {
    b.append(String.valueOf(a[i]));
...

if (aPrefix == null)
    aPrefix = "";
if (aSeparator == null)
    aSeparator = " ";
if (aSuffix == null)
    aSuffix = "";
if (anArray == null || anArray.length == 0)
    return aPrefix + aSuffix;
...

if (args == null || separator == null) {
    return null;
StringBuffer result = new StringBuffer();
if (args.length > 0) {
    result.append(args[0]);
    for (int i = 1; i < args.length; i++) {
        result.append(separator);
...

if (arr == null) {
    return "<<NULL>>";
} else {
    StringBuilder sb = new StringBuilder();
    sb.append("[");
    for (int i = 0; i < arr.length; i++) {
        Object elem = arr[i];
        sb.append(elem.toString());
...

return collectionToString(Arrays.asList(arr));