new programming languages 2017

answer studyFinish the exercises after class.Complete programming Project: At least complete PP10.1, PP10.4, PP10.5. Learning progress Bar lines of code (new/cumulative) Blog Volume (Add/accumulate) Learning Time (new/cumulative) Important Growth Goal 5000 rows 30 Articles 400 hours

This week, through the theory class test and the experimental course program to consolidate the 1-5 chapters of knowledge points. Because the understanding of the program is a bit confusing, so the last big question in the test is not finished. Compared with the last Test, the biggest point is the program reading problems and programming problems. The reasons are as follows:1. Understanding the procedure is not thorough, can not link up and down the p

Parse: Item B: Use + to represent public, use-to represent private. D: The child class points to the parent class. Parse: A variable declared with a class is called an object. Parse: C: NullPointerException exception. E item: If the reference is the same, the entity is identical. Resolution: A: The Cone object Delegate Circle object calls the Getarea () method to calculate the bottom area.

(Scan.nextline ())-1;int foggy = Integer.parseint (Scan.nextline ())-1;Scan.close ();int[][] Matrix = {{0, 2, 5, 3, INF},{INF, 0, INF, INF, ten}, {inf, INF, 0, INF, 7, INF},{2, INF, INF, 0, 2, inf}, {4, INF, INF, 1, 0, INF},{3, INF, 1, INF, 2, 0}};init (size);No fog.if (Foggy! =-1)Setfog (Matrix, foggy);Call FreudFloyd (Matrix);Findpath (begin, end);System.out.println (Dist[begin][end]);for (int i = 0; i Result.set (i, Result.get (i) + 1);if (dist[begin][end] = = INF)Result.removeall (result);S

structure and construction methods of classes and objects Week Four 765/1897 2/7 27/70 Understanding subclasses and inheritance, interfaces and implementations Week Five 1174/3071 2/9 15/85 Learn to handle anomalies, understand the use and characteristics of file streams Week Six 1175/4186 1/10 18/103 Learn about common utility classes and generic and collection frameworks Seventh

;publicclassmain{ publicstaticvoidmain (String[]args) { scannerin=newscanner (system.in); stringnum=in.next ();int Result=0;while (result!=6174) { intleft=0; intright=0; char[]temp=creat (num); char[]l=newchar[4]; arrays.sort (temp); for (inti=3;i>=0;i--) { left=left*10+temp[i]-' 0 '; right=right*10+temp[3-i]-' 0 '; l[i]=temp[3-i] ;} if (left==right) { system.out.println (Newstring (L) + "-" +new String (temp) + "=0000"); return;} result=left-right; s

Java second week learning experienceThis week in Thursday, the teacher conducted a classroom test, completely surprised me, I thought the teacher will be in the first two weeks to talk about, because I did not prepare before class, reversing the class to some unprepared, those questions many many do not, also wrong many, the class has a lot of good students, they prepare fully before class, In the classroom without any pressure, I also realized that I did not spend a lot of time to read the seri

describes the public behavior, so the Java interface is more abstract than the Java abstract class. But the interface is not a class, and you cannot instantiate an interface with the new operator. such as x=new comparable (... );//This is a mistake. However, the interface variable comparable x can be declared; This is permissible. Java interface methods can only be abstract and public, Java interfaces cann

(generally non-private adornments) in the parent class that have access control permissions, and the subclass does not inherit from the properties and methods that are unique to the private decorated parent class.When a subclass needs to change the inherited method, it is often said to override the parent class. Once overridden, this method of the parent class behaves as hidden for the subclass. After the object of the subclass calls this method, it is called after the subclass is overriddenmet

the abstract method acts as a placeholder for their specific implementation in subclasses. Abstract classes cannot be instantiated, meaning that if a class is declared abstract, the object of the class cannot be created, for example: New Person ("Vince Vu") is wrong, but you can create an object of a specific subclass.If the superclass is not explicitly indicated, object is assumed to be a superclass of this class, and any class can use the object cl

java-annotation NetEase 2017 spring recruit written test real problem programming problem set--4. Eliminate duplicate element topics: Small easy to have a length of n sequence, small easy to remove the inside of the repeating elements, but small easy to think is for each element to retain the last occurrence of that. Small easy to meet difficulties, I hope you to help him. The original title address is ente

to think about some of the problems in C that are solved in Java, such as "eat a carriage return" problem, in C language we have to usefflush(stdin);Clears the buffer. In Java, useScanner reader=new Scanner(System.in);String str=reader.nextLine();ReplaceScanner reader=new Scanner(System.in);String str=reader.next();The former receives a carriage return when the string is received, similar to the C language

learning The problem and the method of handling records are concise and clear. Learning progress Bar lines of code (new/cumulative) Blog Volume (Add/accumulate) Learning Time (new/cumulative) Important Growth Goal 5000 rows 30 Articles 400 hours First week 125/125 2/2 20/20

The fifth week of Java Programming Study summary 20165218 2017-2018-2 Textbook Study Contents 7th Chapter Inner class and exception class inner class Defining another class in a class, outer-nested and inner classes Inner classes can use member variables and methods in an outer-nested class Inner classes cannot declare class variables and class methods For use only with outer-nested cla

the connection database Solution: Found in the password password more knock a space, but actually set the time without setting the password, so display error, delete the space to display a successful connection Issue 2: When debugging example11_1, the query was unsuccessful because the table name created is inconsistent with the book Solution: Create a database named students in phpMyAdmin and use the " rs=sql.executeQuery("SELECT * FROM students "); " statement to successfully disp

represented by true and false, in Java, where a Boolean value and an integer cannot be converted to each other. Conditional quotations have two types of IF statements and switch statements. For the third chapter of the textbook on a total of 60 pages of all the thorough understanding of the content has not been fully achieved, the teacher's courseware downloaded their own more to see more learning but still some difficulty, in the last semester of C language learning some basic knowledge is not

can define many methods of the same name at the same time. The formal parameters, types, or order names of these methods are different, and the returned values are not the same as overloads. The generic method cannot be accessed with the class name, and an out-of-class object cannot access the class. Static-decorated fields are statically domain, non-static can access static member variables, and all objects share a static domain. A static method can be called by a class name or object, while o

Learning classes and objects, but feeling very abstract, not fully understood. A class is a collection of objects that have the same properties and behaviors. The class, feeling understood, but the object of the declaration, although it will be used, but still feel very strange. Learning to initialize objects with constructors requires a number of exercises. It's not easy to figure out. Learn to construct and initialize an object with a constructor (constructor). Format:

agile development and XP practice-4Refer to Http://www.cnblogs.com/rocedu/p/6683948.html to complete the learning of Java cryptography related content in pairs, combining refactoring, git, and code standards. Submit the learning Result Code cloud link and the representative result, must have the student number watermark.Run Experimental thoughts, through this experiment let me have a deeper understanding of Java, the understanding of Java, especially the content of refactoring and

This semester passed, thanks to the Java teachers and teaching assistants, hard, here in advance to wish a happy New Year's day. In my heart I like the teacher's class way, all did not learn is not enough of their own efforts, the teacher just started to let us register blog, one way or over, now is full of memories. Many years later will also think of teachers and classmates, will remember this is the second grade. Finally, I hope the final exam will