java的collections工具类

常用方法,多用才熟练:

addAll(Collection<? super T> c, T... elements)

binarySearch(List<? extends T> list, T key,Comparator<? super T> c)


checkedCollection(Collection<E> c,Class<E> type)


copy(List<? super T> dest,List<? extends T> src)


disjoint(Collection<?> c1,Collection<?> c2)


enumeration(Collection<T> c)


fill(List<? super T> list, T obj)


frequency(Collection<?> c,Object o)


indexOfSubList(List<?> source,List<?> target)


list(Enumeration<T> e)


max(Collection<? extends T> coll,Comparator<? super T> comp)


min(Collection<? extends T> coll,Comparator<? super T> comp)


replaceAll(List<T> list, T oldVal, T newVal)


reverse(List<?> list)


rotate(List<?> list, int distance)


sort(List<T> list,Comparator<? super T> c)


swap(List<?> list, int i, int j)