What is HashMap HashMap data structure analysis
What is HashMap
Based on a Map interface implementation of the hash table, the stored object is a key-value pair object (Entry "K, V");
HashMap Supplement
Based on the array and linked list implementation, the internal maintenance of an array table, the array holds the header node of each linked list; when searching, first calculate the hash value of the key through the hash function, and then calculate the array index according to the hash value of the key (take The remainder method), then find the linked list header node according to the index, and then traverse to find the linked list;
HashMap data structure
Draw a schematic diagram, as follows, the index of the array on the left is calculated according to the hash value of the key. Different hash values ​​may generate the same index, that is, hash collision. At this time, the hash address conflict is handled by the chain address method, that is, all indexes are consistent. The nodes form a single linked list;
HashMap inherited class and implementation interface
Map interface, the meaning of the method is very simple, basically look at the method name will know, will be detailed in the HashMap source code analysis
Methods defined in the AbstractMap abstract class
HashMap source code analysis, most of which have been annotated
Simple use example
Differential pressure sensor (DPS) is a sensor used to measure the difference between two pressures. It is usually used to measure the pressure difference between the front and rear ends of a certain equipment or component.
Looseness often occurs during installation. The transmitter is connected with the three valve manifold. The bolts should be tightened diagonally. Generally, they cannot be locked at one time. The sealing ring should be densified during the installation of the three valve manifold.
Differential Pressure Sensor,Differential Pressure Transmitter Sensor,Differential Air Pressure Sensor,Adjustable Differential Pressure Sensor
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