Java Utililty Methods Map to String

Set entries = map.entrySet();
Iterator iter = entries.iterator();
StringBuffer buff = new StringBuffer();
while (iter.hasNext()) {
    Map.Entry entry = (Map.Entry) iter.next();
    buff.append("[" + entry.getKey() + "," + entry.getValue() + "]\n");
return buff.toString();
...

String mapString = map.toString();
return mapString.substring(1, mapString.length() - 1);

if (map == null)
    return "null";
StringBuilder sb = new StringBuilder();
for (Map.Entry<? extends Object, ? extends Object> entry : map.entrySet()) {
    Object key = entry.getKey();
    Object val = entry.getValue();
    sb.append(key).append("=");
    if (val == null)
...

StringBuilder sb = new StringBuilder();
if (map == null || map.isEmpty()) {
    return sb.toString();
for (Object key : map.keySet()) {
    sb.append(key.toString());
    sb.append(" : ");
    sb.append(map.get(key).toString());
...

return mapToString("\n", ",", map);

StringBuilder sb = new StringBuilder("{");
for (Map.Entry entry : map.entrySet()) {
    sb.append(entry.getKey()).append(": ").append(entry.getValue()).append(", ");
return sb.append("}").toString();

if (map.isEmpty()) {
    return "";
StringBuilder stringBuilder = new StringBuilder();
boolean notFirst = false;
for (Map.Entry<?, ?> entry : map.entrySet()) {
    if (notFirst) {
        stringBuilder.append(',');
...

return mapToString(map, "=", ",");

StringBuilder sb = new StringBuilder();
List<Character> keys = new ArrayList<Character>(acs.keySet());
Collections.sort(keys);
for (Character c : keys) {
    sb.append(c);
    int count = acs.get(c);
    if (count > 1) {
        sb.append(count);
...

if (m == null)
    return "null";
Set<Entry<K, V>> set = m.entrySet();
int max = set.size() - 1;
if (max == -1)
    return "{}";
StringBuilder sb = new StringBuilder();
Iterator<Entry<K, V>> it = set.iterator();
...