![]() The difference between HashMap and TreeMap is that HashMap does not maintain a specific order in data elements while TreeMap maintains the ascending order of data elements. This article discussed the difference between HashMap and TreeMap which implements the Map interface. A TreeMap is a Map based collection class that is used for storing key and value pairs which maintains the ascending order of data elements. A HashMap is a Map based collection class that is used for storing key and value pairs which do not maintain a specific order in data elements. ![]() The map is an interface belongs to collection framework. In collections, the programmer can store many elements as required. Therefore, the array size should be initialized at the beginning. In arrays, there can be a fixed number of elements. Programming languages such as Java contains the collection framework. The TreeMap maintains the ascending order. What is the Difference Between HashMap and TreeMap?Ī HashMap is a Map based collection class that is used for storing key and value pairs which do not maintain a specific order in data elements.Ī TreeMap is a Map based collection class that is used for storing key and value pairs which maintains the ascending order of data elements. There is no limitation to the number of elements that can be stored in both HashMap and TreeMap.Both HashMap and TreeMap can have many null values.Both HashMap and TreeMap contains key, value pairs.Both HashMap and TreeMap can store and manipulate many elements.Both HashMap and TreeMap implements Map interface. ![]() What are the Similarities Between HashMap and TreeMap? The elements are printed in ascending order. When observing the output, it can be seen that TreeMap maintains a specific order. If the programmer wants to get all values, then he can use Map.Entry to print all keys and values. When using studentList.get(“150”) it will print the corresponding name to that index which is Ann. To fetch the values, the programmer should use the get method with the key. Values can be inserted using the put method. Then the programmer can add elements using that object. Each key, value pair is an entry of the HashMap.Īccording to the above program, an object of TreeMap is created. The K refers the key while V refers to the value corresponding to that specific key. Public class HashMap extends AbstractMap implements Map, Cloneable, Serializable It is easy to find the elements in HashMap using the key. It extends the AbstractMap class and implements Map interface. HashMap is a class that implements the map interface. Side by Side Comparison – HashMap vs TreeMap in Tabular Form Similarities Between HashMap and TreeMapĥ. The key difference between HashMap and TreeMap is that HashMap does not maintain a specific order in data elements while TreeMap maintains the ascending order of data elements. A TreeMap is a Map based collection class that is used for storing key and value pairs that maintain the ascending order of data elements. A HashMap is a Map based collection class that is used for storing key and value pairs that do not maintain a specific order in data elements. HashMap and TreeMap are classes that implement the Map interface. There are only unique keys, and each has a corresponding value. The map is used to represent data in the key, value pairs. ![]() In Java, the Map interface belongs to collections. Operations such as inserting, deleting, sorting and searching can be performed using collections. Instead, the programmer can use collections. In a normal array, there is a fixed number of elements to store. It is a framework with classes and interfaces for storing and manipulating a set of data elements. Programming languages such as Java use Collections. In programming, there are various mechanisms to collect data.
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