concise introduction to data structures using java
concise introduction to data structures using java
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I. What the data structure coversSecond, the basic concept of the algorithm:1, the concept of the algorithm:Algorithm is a description of the solution step for a particular problem, which is a finite sequence of instructions, where each instruction represents one or more operations.2, the characteristics of the algorithm:
Poor sex: Instruction sequence is limited
Certainty: Each statement has a clear meaning and no ambiguity
Feasibili
From the previous introduction, we know that in a binary tree, each node has only one data item, with a maximum of two child nodes. If you allow each node to have more data items and more child nodes, it is a multi-fork tree. This blog we will introduce the--2-3-4 tree, which is a multi-fork tree, with a maximum of four child nodes and three
Vector implements a dynamic array. is an array of objects that can be automatically grown.Comparison of vectors and ArrayList:1, all in an array format to store data, index data block insert data slow2, ArrayList will be faster than vector, he is non-synchronous3, involving multi-threading, vector is a better synchronizationUsage:1. Constructor:1) Construction me
Array Advantages: Fast query, if you know the index can quickly access the disadvantage: Delete slow, size fixed ordered array advantages: Faster than unordered array lookup disadvantage: Delete and insert slow, size fixed stack advantages: Provide last-in-first-out access method disadvantage: Access to other items is slow queue advantages: Provide first-in-out access method disadvantage: access to other The items are slow. List Advantages: Quick Insert, delete fast disadvantage: find slow (each
(String)); }Second, the use of the stack-delimiter matching.public int charat (char c) {for (int i = 0; i will ({Press into the stack once, once encountered)}] will be compared with the popup element, if it matches, then match. If not)}], the left sign of the stack pops up and the hint is where the specific right symbol type is missing. This is a tool that can be implemented using stacks.Stack of data i
Analysis of common JAVA data structures and principles
Not long ago, the interviewer asked me to explain how to understand the java data structure framework. I have also read some of the source code before. balabala has talked about a bunch of ideas and I will summarize them
: a container for data storage, an array, or a linked list; a pointer; Other API behaviors are all around the container ** The main composition of a queue: a container for data storage, an array of arrays, or a list of two pointers. ** is not suitable for large amounts of storage, just a means of implementing some sort of algorithm.,** Restricted access Mode **@ authorerjun2017 December 6 Morning 9:11:40*/
//Delete a node in a binary sort tree the PublicBstree Deletebstree (Bstree bstree,intkey) { the if(Bstree = =NULL) { - return NULL; - } the the if(Bstree.data = =key) { the //first case: leaf node the if(Bstree.left = =NULL Bstree.right = =NULL) { -Bstree =NULL; the } the //second case: node has left dial hand nodes. the if(Bstree.left! =NULL Bstree.right = =NULL) {94Bstree =Bstree.left; t
Stackelement see the implementation of the stackPackage Com.lip.datastruture.stack;public class QueueOperation Result:Implementation of the queue of data structures (JAVA)
' (', directly into the stack, if ') ', out of the stack and sequential output operator until the first ' (', the first encountered ' ('), but not the output, if the arithmetic character, the top element of the stack and the current element precedence: If the top of the stack operator precedence >= the current element priority , out of the stack and sequential output operator until the top element of the stack priority 5, repeat the 3rd until the expression scan is complete.6, sequentially out
() method in the Bubblesort.java program (listing 3.1) with the Oddevensort () method . Make sure it runs in a sort of different amount of data, and that you need to figure out the number of two scans. Parity Ordering is actually useful in multiprocessor environments where the processor can process each odd pair at the same time, and then handle even pairs at the same time. Because the odd pairs are independent of each other, each pair can be compar
methods of collection and traversal mode Collection:add () Remove () contains () iterator () size () Traversal: Enhanced for iterator |--listget () Traversal: normal For|--setmap:put () Remove () ContainsKey (), Containsvalue () KeySet () get () value () EntrySet () size () Traversal: Find values based on key values for key and value jobs: Any collection I've explained, I ask you to store what you are able to store. And, you have to be able to traverse it.4:arraylist,linkedlist,hashset,hashmap
. You only need to change the reference point. Another important aspect is that the array size is fixed when defined, but the linked list can allocate any size or even all available memory.
ABSTRACT Data Type
ADT, in short, is a way to consider the data structure: focus on what it does, and ignore how it does it. Both stack and queue are examples of ADT. They can be implemented not only
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