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Iterator iter = hm.keySet().iterator();
while(iter.hasNext())
{
System.out.println(iter.next());
}
iter = hm.keySet().iterator();
while(iter.hasNext())
{
System.out.println(iter.next());
}
HashMap hm = new HashMap();
if(!hm.containsKey(key))
{
hm.put(key, value);
}
else
{
hm.put(key, hm.get(key)+value);
}
public void add(String key, String value) {
if(map.get(key) == null) {map.put(key,value)}
else map.put(key, ((String)map.get(key)) + value);
}