Java Utililty Methods Array to String

if (v == null)
    return "";
StringBuilder strbuf = new StringBuilder();
for (int i = 0; i < v.length; i++) {
    if (i > 0)
        strbuf.append(delim);
    strbuf.append(v[i]);
return strbuf.toString();

String[] result = new String[dom.length];
for (int i = 0; i < dom.length; i++)
    result[i] = String.valueOf(dom[i]);
return result;

String str = null;
if (arg != null) {
    StringBuffer sb = new StringBuffer();
    sb.append("{");
    Set<Entry<String, String[]>> entries = arg.entrySet();
    for (Entry<String, String[]> entry : entries) {
        String key = entry.getKey();
        String val = Arrays.toString(entry.getValue());
...

if (array == null) {
    return null;
Class<?> type = array.getClass();
if (type.isArray()) {
    if (type.getComponentType().isPrimitive()) {
        if (type == byte[].class) {
            byte[] valueArray = (byte[]) array;
...

Class<?> arrayType = array.getClass();
if (!arrayType.isArray()) {
    throw new IllegalArgumentException("specified object is not an array");
Class<?> componentType = arrayType.getComponentType();
if (componentType.isPrimitive()) {
    if (componentType == boolean.class) {
        return Arrays.toString((boolean[]) array);
...

Outputs an array as a String, treating null as an empty array.

return toString(array, "{}");

return toString(array, ",");

if (a == null)
    return "null";
if (a.length == 0)
    return "[]";
StringBuffer buf = new StringBuffer();
buf.append('[').append(a[0]);
for (int i = 1; i < a.length; i++) {
    buf.append(", ").append(a[i]);
...

return toDelimitedString(array, ",");

return Arrays.toString(array);