data structures abstraction and design using java

Another article reference: http://blog.csdn.net/u010947402/article/details/51878166Perhaps you have mastered the use of Java. util package inside the various data structures, but I would like to say a Java version of the data structure and algorithms, I hope to help you.Line

sequence used to form the interval (121,40,13,4,1) is called the interval series. The interval sequence represented here is presented by Knuth.A: The sequence begins in reverse Form 1, and is generated by a recursive expression H = 3 * H +, with an initial value of 1. The first two columns of the following table show the sequence of this formula.A: in a sorting algorithm, the initial interval is calculated by using the generation formula of the seque

Chapter 7 of Robert lafore, Java data structures and algorithms /* 7.1 modify the partition. Java program (List 7.2) so that the partitionit () method always uses an array (rightmost) data item with the maximum downmarked value as the pivot, rather than any

, Boolean inclusive): Returns the map's child map whose key range is less than tokey (whether it includes all keys depending on the second parameter).Summarize　　If it involves operations such as stacks, queues, and so on, you should consider using the list, for quick insertions, for deleting elements, should use LinkedList, and if you need to quickly randomly access elements, you should use ArrayList.If the program is in a single-threaded environment,

, we have used a _count, the front said _count is the counter, then why use counter? Because Weakmap is the "object type" of a key-value pair, it is not said to be as long as an array, so a counter is needed instead of the array's subscript to implement various stack-based methods.Here we have basically finished our stack, and the next article will look at how we can do some interesting things with the stacks we've written.Finally, because my level is limited, the ability and the great God is st

(Object obj)Containsall (Collection c)Clear ()Hashcode ()Equals (Object obj)IsEmpty ()Size ()Map interface methodPut (Key,value)Get (Object key)Remove (Object key)ContainsKey (Object key)Containsvalue (Object value)Note: = = differs from equals (Object obj), = = is the value comparison in the base data type, and the other is the address comparison. equals compares the content when a string Integer date overrides the Equals method, and the other compa

be very low, because arraylist needs to move a large number of elements inside it. The following is an example of using arraylist: Package CLS; import Java. util. *;/*** arraylist array test * 2013.3.22 **/public class arraylisttest {public static void main (string [] ARGs) {arraylist The listlist class implements the list interface using a linked list. This

initialization capacity of the hashmap too high or load factor too low.Weakhashmap classWeakhashmap is an improved hashmap, which implements a "weak reference" to key, which can be recycled by GC if a key is no longer referenced externally.SummarizeIf it involves operations such as stacks, queues, and so on, you should consider using the list, for quick insertions, for deleting elements, should use LinkedList, and if you need to quickly randomly acce

In the development of the data will inevitably encounter, the system returns the collection of dictionaries, the collection of a dictionary, and then a dictionary or a dictionary or a collection of complex structure data ... Mjextension easily fix this kind of problem1. Workaround One:Example: There is a model for the post data in the best project, there is a col

The table in Lua is not a simple data structure that can be used as a basis for other data structures, such as arrays, records, lists, queues, and so on. 1, array In Lua, the index of a table can be represented in many ways. If you use an integer to represent the index of a table, you can use a table to implement the array, and in Lua the index usually starts a

Doing the project today, the whim, decided to use their usual Java data type collation (Java Master and the basic good netizen don't look down, kneeling beg not to spray), are very basic very simple things, but I think it is necessary, good memory than bad pen, oneself in order to facilitate the development of it, Java

; - //discretization Operations $ for(i=1; i){ $ if(p[i].v!=p[i-1].V) s++; -a[p[i].pos]=s; - } the //Calculate reverse order, read from backwards - for(i=n;i>=1; i--){Wuyi Insert (A[i]); the //The statistics are smaller than their own -Ans+=getsum (a[i]-1); Wu } -coutEndl; About } $ } - intMain () { - Liisa::main (); - return 0; A } +InlineintRead () { the intk=0, f=1; - CharC=GetChar (); $ while(c>'9'

in a dictionaryThe Dict () constructor can create a dictionary directly from the key-value pairDict ([' Tim ', 123), (' Tiny ', 234)]) >>>{' Tiny ': 234, ' Tim ': 123}Derivation creates a dictionary:{d2:d2+ ' @main. com ' for D2 in List (D.keys ()}}>>>{' Jack ': ' [email protected] ', ' Tom ': ' [email protected] '}Exercise: A key-value pair in a circular output dictionary:For Name,email in D.items ():Print (Name,email)4. CollectionEmpty collection: A = set () ※ to create an empty collection, y

1 ImportJava.util.*;2 3 Public classReverse {4 Publicstring reversestring (String inistring) {5 Char[]initchar=Inistring.tochararray ();6 intlen=initchar.length;7 for(inti=0;i){8 CharTemp=initchar[len-i-1];9initchar[len-i-1]=Initchar[i];Teninitchar[i]=temp; One } Ainistring=string.valueof (Initchar); - returninistring; - } the}Flips a given string without using additional