learning java fourth edition

expression known as a postfix expression. the * 1 2 3 + 4 5 * * + + * A * the ******************************************************************************/ + - Public classEvaluate { $ Public Static voidMain (string[] args) { $stackNewStack(); -StackNewStack(); - the while(!Stdin.isempty ()) { -String s =stdin.readstring ();Wuyi if(S.equals ("(")) ; the Else if(S.equals ("+") ) Ops.push (s); - Else if(S.equals ("-") ) Ops.

- * 8000 35.7 8.0 + * ... - * + ******************************************************************************/ A at /** - * The - * The running time of a method using a doubling ratio test. - * - * For additional documentation, see http://algs4.cs.princeton.edu/14analysis">section 1.4 - * of in * - * @authorRobert Sedgewick to * @authorKevin Wayne + */ - Public classDoublingratio { the Private Static Final intMaximum_integer = 1000000; * $ //This is class should not bei

;106 }107 108 //Print array to standard output109 Private Static voidShow (comparable[] a) { the for(inti = 0; i ) {111 stdout.println (A[i]); the }113 } the the /** the * Reads in a sequence of strings by standard input; bottom-up117 * mergesorts them, and prints them to standard output in ascending order.118 */119 Public Static voidMain (string[] args) { -String[] A =stdin.readallstrings ();121 Mergebu.sort (a);122 Show (a);123 }124}Algorithm

) = 9- i; for (int i = 0; i ) = A[a[i]]; for (int i = 0; i ) System.out.println (A[i]); // print I as shown in the book, the title is meaninglessAnswer:1.1.13 writes a piece of code that prints a transpose (swap rows and columns) of a two-dimensional array of M row N columns. Answer:int [] a={{1,2,3},{4,5,6}}; int New int [A[0].length][a.length]; for (int i = 0; i ) { for (int j = 0; J ) { = a[j][i]; + " "); if (j = = A.length-1) System.out

1 /*************************************************************************2 * 3 * Josephus Problem4 * 5 *% java ex_1_3_37 7 26 * 1 3 5 0 4 2 67 * 8 *************************************************************************/9 Ten Public classex_1_3_37 One { A Public Static voidMain (string[] args) - { - intn = integer.parseint (args[0]), them = Integer.parseint (args[1]); - -queueNewQueue(); - for(inti = 0; I

the items on the ' queue ' in FIFO order.98 */ About PublicIteratoriterator () { - return NewListiterator (); 101 }102 103 Private classListiteratorImplementsIterator {104 Private intn =N; the PrivateNode current =Last ;106 107 Public BooleanHasnext () {returnn > 0; }108 Public voidRemove () {Throw Newunsupportedoperationexception (); }109 the PublicItem Next () {111 if(!hasnext ())Throw Newnosuchelementexception

- //Return the number of items in the queue. the Public intsize () { + returnStack1.size () +stack2.size (); A } the + //return the item least recently added to the queue. - PublicItem Peek () { $ if(IsEmpty ())Throw NewNosuchelementexception ("Queue underflow"); $ if(Stack2.isempty ()) Movestack1tostack2 (); - returnStack2.peek (); - } the - //Add the item to the queueWuyi Public voidEnqueue (item item) { the Stack1.push (i

1 PackageAlgorithms.util;2 3 /******************************************************************************4 * Compilation:javac Directory.java5 * Execution:java Directory directory-name6 * Dependencies:Queue.java Stdout.java7 * 8 * Prints out all of the files in the given directory and any9 * subdirectories in Level-order by using a queue. Also PrintsTen * out their file sizes in bytes. One * A *% java Directory. - * - ************************

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Learning Object-C from scratch --- the fourth day (3), object-c --- the fourth day Today, we will first summarize the previous data types: Note: The id data type is a special data type of OC. It can be used to store any data type and is the basis of polymorphism and dynamic binding. Start a new explanation-arithmetic expressions A piece of code begins today's

Learning Object-C from scratch --- the fourth day (2), object-c --- the fourth day I have been busy with the company recently and stopped for a few days. Learning is more important than sticking to it. Today, I will explain how to use Object-C data types and expressions. 1. float Type //// Main. m // Demo3 /// Created

is a reference to the two const string.When we use the function name as a value, the Change function is automatically converted to a pointer.void Usebright (const string AMP;S1, const string AMP;S2, BOOL PF (const string , const string ));Equivalent to: PF is automatically converted as a parameter to a pointervoid Usebright (const string AMP;S1, const string AMP;S2, BOOL (pf*) (const string , const string ));Similarly, the simplest way to declare a function that returns a function pointer is to

progress Bar Lines of code (new/cumulative) Blog volume (Add/accumulate) Learning time (new/cumulative) Important growth Goal 3500 rows 28 Articles 300 hours First week 200/200 1/1 10/10 Second week 300/500 1/2 20/30 Third week 300/800 2/4 20/50 Week Four

20165115 2017-2018-2 "Java Program design" Fourth week study summary textbook study summaryThe fifth chapter mainly focuses on the inheritance of subclasses, and introduces a series of methods and keywords on this basis. In the sixth chapter, the main content is the implementation of the interface.Code HostingLast week's summary of the wrong quizSupplement after completionResources

Spring in Action Learn notes -- Fourth Chapter Conquer database First, a good news, during the 2006 National Day, Spring2.0 Official edition (Http://www.springframework.org/download) and Spring2.0 Chinese documents (http:// spring.jactiongroup.net/viewtopic.php?t=2279sid=0906ae6a913537b249e501db5b54c181) was finally released. After the previous study, we've learned the core of the spring framework, and

Fourth Week Rethinking JAVA LearningFourth week ofJavastudy is still around the object and class, but I think and the third week'sJAVAlearning, the object and class of learning is not deep enough, many problems are still left. The first three chapters of the study are some of the basics, and inCMost of the language we have learned, so we feel that it is not very

20172330 2017-2018-1 "Java Program design" Fourth week study summary textbook study summaryThis week's content is more and more complex, including chapters fourth and seventh. The fourth chapter introduces the definition and concept of class structure, and gives us a lot of examples to show the method and appl

Preach Intelligence podcast Li Yong's JDBC series learning finally close to the end, so happy, can learn so many things, not to hurry to record down, left to aftertaste!How to use open Source project DBCP (common in actual projects) It consists of three steps: A jar package that must be used with DBCP. Add the DBCP configuration file. Java API:BasicDataSourceFactory.createDataSource (prop);

Version of 1.2.3 Shiro API chm incident document generation. Get Shiro Source code Compiling the Build API documentation Convert to CHM format API Get Shiro Source codeShiro Official Website: http://shiro.apache.org/Download the source code resource bundle and use Myeclipse/eclipse to add the code to the project. Such as:The jar package that needs to be used:Compiling the Build API documentation Created with Rapha?l 2.1.2

1. Service(1) Meaning: Service is an application component that runs in the background for a long time, and the threads are the main thread.(2) How to use: StartService can perform onstartcommand operations, Bindservice can return the instance object of the service to the activity, thus enabling the use of service in the activity. Instead, the service object was created with the new method without an error, but the service's method could not be successfully invoked.(3) Note: In Onstartcommand, t