The singletonMap(K, V) method is used to get an immutable map, mapping only the specified key to the specified value.

Where is collections singletonMap () used?

The singletonMap() method of java. util. Collections class is used to return an immutable map, mapping only the specified key to the specified value. The returned map is serializable.

What is collections binarySearch?

binarySearch. Searches the specified list for the specified object using the binary search algorithm. The list must be sorted into ascending order according to the natural ordering of its elements (as by the sort(List) method) prior to making this call. If it is not sorted, the results are undefined.