まちがいやすい
2270 ワード
毎回comparatorはobjectのleixingを書くことを覚えていません
Arrays.sort ( intervals, new Comparator (){ public int compare ( Interval in1, Interval in2 ){ return in1.start - in2.start; } });
HashMap
Removes all of the mappings from this map.
Returns a shallow copy of this
HashMap instance: the keys and values themselves are not cloned.
Returns
true if this map contains a mapping for the specified key.
Returns
true if this map maps one or more keys to the specified value.
Returns a
Returns the value to which the specified key is mapped, or
Returns
true if this map contains no key-value mappings.
Returns a
Associates the specified value with the specified key in this map.
Copies all of the mappings from the specified map to this map.
Removes the mapping for the specified key from this map if present.
Returns the number of key-value mappings in this map.
Returns a
Arrays.sort ( intervals, new Comparator (){ public int compare ( Interval in1, Interval in2 ){ return in1.start - in2.start; } });
HashMap
void clear() Removes all of the mappings from this map.
Object clone() Returns a shallow copy of this
HashMap instance: the keys and values themselves are not cloned.
boolean containsKey(Object key) Returns
true if this map contains a mapping for the specified key.
boolean containsValue(Object value) Returns
true if this map maps one or more keys to the specified value.
Set> entrySet() Returns a
Set view of the mappings contained in this map. V get(Object key) Returns the value to which the specified key is mapped, or
null if this map contains no mapping for the key. boolean isEmpty() Returns
true if this map contains no key-value mappings.
Set keySet() Returns a
Set view of the keys contained in this map. V put(K key, V value) Associates the specified value with the specified key in this map.
void putAll(Map extends K,? extends V> m) Copies all of the mappings from the specified map to this map.
V remove(Object key) Removes the mapping for the specified key from this map if present.
int size() Returns the number of key-value mappings in this map.
Collection values() Returns a
Collection view of the values contained in this map.