data structures and algorithm analysis in java

in the http://blog.csdn.net/robertcpp/article/details/51559333 article, we talked about sorting, this chapter introduces basic data structures: tables, queues, stacks, and their simple implementationsTable ADT1, array implementation Order tableIt is more appropriate to choose this kind of implementation by using an array operation to directly add or remove the table to the tables, and this linear table take

left are drawn in a circle, then the operator is applied to operate two operands and the result is written in the circle. The value in the largest circle is the final result of the expression.Q: What are the rules for evaluating suffix expressions?A: how can I write a program to repeat the evaluation process? As described above, with each operator encountered, it is used to calculate the last two operands seen before, which indicates that the stack can be used to store the operand. It has the f

, and we'll talk about sorting algorithms later on.③, delete slowly, according to the value of the element is deleted, we need to find the location of the element, and then the value behind the element to move the whole forward one position. It also takes a lot more time.④, arrays once created, the size is fixed, you cannot dynamically expand the number of elements of the array. If you initialize to a very large array size, it will be wasted memory space, if it is small, the number of subsequent

The number of elements that need to be processed is determined and needs to be considered when using subscripts, but it is recommended to use list ArrayList Not recommended, recommended for use with list list It is generally recommended to use an indeterminate number of elements to process Linkedlist List is suitable for the number of elements are not fixed, the need to constantly increase or decrease the node, 2 can be increased

Algorithm Figure Search (breadth first, depth first) depth priority is particularly important Sort Dynamic programming Matching algorithm and network flow algorithm Regular expressions and string matching Data Diagram (the tree is particularly important) Map Heap Stacks/Queues Tries | Dictionary Tree Additi

-oriented: Objects include both methods and fields (data). Class is a description of any number of objects. Create an object that you want to use with the name of the keyword new and the class. Call the method of an object to use the dot operator. class libraries for Java data structuresThe Java.util package contains

inconsistent with the output data order.In Java, a hash code represents a characteristic of an object, such as we determine whether a string is = =, and if its hash code is equal, the two strings are equal. Secondly, hash code is an algorithm of data structure. Common hash code algorithms are:The hashcode of the 1:obj

Array The number of elements that need to be processed is determined and needs to be considered when using subscripts, but it is recommended to use list ArrayList Not recommended, recommended for use with list list It is generally recommended to use an indeterminate number of elements to process Linkedlist List is suitable for the number of elements are not fixed, the need to constantly increase or decrease the nod

, recommended for use with list list It is generally recommended to use an indeterminate number of elements to process Linkedlist List is suitable for the number of elements are not fixed, the need to constantly increase or decrease the node, 2 can be increased or decreased Queue First-out situation Stack Last-in, first-out situations Dictionary Requires key-value pair, fast operation 　

What is a data structure :The data structure is the way that the computer stores and organizes it.A data structure is a collection of elements that have one or more specific relationships to each othertypically, a well-chosen data structure can lead to higher operational or storage Efficiency.

length 3. So when the data processing is not long, it is prudent to use the dictionary as well, in many cases the use of arrays is also acceptable.2. Usage scenarios for several common data structures Array The number of elements that need to be processed is determined and needs to be considered when using subscripts, but it is recommended t

seen a lot about the drawbacks of arrays. If the insertion time in an unordered array is fast, but the lookup takes a slower time. It can be found quickly in an ordered array, but it takes a long time to insert. For both arrays, the delete operation time is also slow.If you have a data structure that takes any action, such as inserting, deleting, and looking up quickly (ideally an O (1) or O (Logn)), that's fine.Another problem with arrays is that wh

Java data structures and algorithms (Robert lafore) Chapter 3 /* 3.1 bubblesort. in Java program (listing 3.1) and bubblesort special applet, The in index variable is moved from left to right until the maximum data item is found and moved out of the out variable on the right

complete most functions of the field****************An iterator is a design pattern that is an object that can traverse and select objects in a sequence, and the developer does not need to know the underlying structure of the sequence . Iterators are often referred to as "lightweight" objects because they are less expensive to create.The iterator functionality in Java is relatively simple and can only be moved one way:(1) Use Method iterator () "Call

About the data structures used in the kernel this series will have five articles, Introduced separately Linked list Queue Hash Mapping Red and black Treesfirst, the introduction of the core linked list The linked list defined in the kernel is a two-way list, in the previous article--libevent source code Analysis--queue.h in the understanding of tail Q_Q Ueue desc

" because a maximum value is placed on the right side of each round. So the number of elements per round is less than one, which is why the range of J is gradually decreasing. It is not difficult to write a bubble sort quickly after you understand it.　　Bubble Sort Performance Analysis:　　Assuming that the number of array elements participating in the comparison is N, then the first round of sorting has a N-1 comparison, the second round has N-2, and so

The programThe purpose of this assignment are to provide some exercise in using multiply-linked data structures. Your program would be a number Grid . It would provide a grid with ten rows and six columns. a cell in the grid can hold and display either a number (a double) or a string. Operations is provided which display the grid, assign values to the cells, does arithmetic on cells, does arithmetic on R

to implement, tracking the algorithm is not straightforward.Other interval sequencesThe selection interval sequence can be called a magic. Only the formula h=h*3+1 generation interval sequence is discussed here, but the application of other interval sequences has achieved varying degrees of success. There is only one absolute condition, that is, the gradually decreasing interval must be equal to one at a time, so the last order is a normal insertion

that each round of the element that participates in the comparison is labeled "0,1,......,length-i" because a maximum value is placed on the right side of each round. So the number of elements per round is less than one, which is why the range of J is gradually decreasing. It is not difficult to write a bubble sort quickly after you understand it.　　Bubble Sort Performance Analysis:　　Assuming that the number of array elements participating in the comp