statusnanax.blogg.se

Interfaces allow collections to be manipulated independently of the details of their representation. Interfaces: These are abstract data types that represent collections. Some implementation of the Iterator class throws this exception, including all. This is because the result of the iteration becomes undefined with it. For Example - It is not permissible for a thread to modify a Collection when some other thread is iterating over it.

Java TransferQueue – Java LinkedTransferQueue class Although maps are not collections in the proper use of the term, but they are fully integrated with collections. Maps store key/value pairs. The algorithms are said to be polymorphic: that is, the same method can be used on many different implementations of the appropriate collection interface.In addition to collections, the framework defines several map interfaces and classes. In essence, they are reusable data structures.Algorithms: These are the methods that perform useful computations, such as searching and sorting, on objects that implement collection interfaces.

ArrayList removeAll() – remove all occurrences from list ArrayList sort() – Sort list of objects by field ArrayList removeIf() – remove objects by field How to join or merge two hashmaps in Java How to remove duplicate elements in ArrayList

Java ArrayList ensureCapacity() method example Java ArrayList contains() – Check if element exists Java ArrayList toArray() – Convert ArrayList to Array How to convert Vector to ArrayList in Java

ArrayList get() – Getting Element at Index How to swap two elements in ArrayList in Java How to serialize and deserialize ArrayList in Java How to empty or clear ArrayList in Java Check if ArrayList is empty or not in Java

ArrayList add/replace element at specified index in Java How to remove element from ArrayList in Java Add multiple items to ArrayList in Java Get sublist of ArrayList – ArrayList subList() method Arraylist lastIndexOf() – Get last index of element in arraylist in Java

How to design good custom key object for HashMap Top 40 Java collection interview questions and answers Difference between HashMap vs Hashtable in Java Difference between enumerator and iterator? Different ways to iterate over Collections in Java