Map<String, String> m =
new
TreeMap<String, String>();
m.put(
"A1"
,
"A1"
);
m.put(
"A2"
,
"A2"
);
m.put(
"B1"
,
"B1"
);
m.put(
"B2"
,
"B2"
);
m.put(
"C1"
,
"C1"
);
m.put(
"C2"
,
"C2"
);
Iterator<String> iterator = m.keySet().iterator();
while
(iterator.hasNext()) {
String key = iterator.next();
if
(key.startsWith(
"B"
)) {
iterator.remove();
}
}
System.out.println(m);