the parent class to the type of the child class. In the parent class, if the abstract method is defined, the parent class must also be decorated with an abstract, and if the child class defines all the abstract methods in the parent class, the subclass may not be an abstract class. Conversely, subclasses are abstract classes. An abstract class can contain specific data and methods, or it can contain no abstract methods. By using a method name in a super.+ parent class in a subclass, you can cal
This week the teacher according to the traditional teaching method: the classroom teaching method to the fifth chapter succession carries on the key explanation, through the teacher's explanation, I learned a lot of knowledge, especially some details, this is oneself in the self-study process not to notice. This week, the teacher slowed down the progress, I feel that the effect of learning is much better than the previous weeks, may also be many years of teacher classroom teaching method down th
,bounceframe,bounce)
from Ball Class (new 2d ellipse, defined Move method)Ballcomponent Class ()The bounce program should be queued for the user's actions, the event will respond to the next, the program serial,The Bouncethread program, executed with thread threads, is defined as the thread, concurrency of the event response action in Addball
There are two ways to implement a synchronization mechanism:
1. Synchronize code blocks:Synchronized (same data) {} same data: N thre
: The difficulty they encountered was that they would encounter code that they did not understand and were worried that they could not catch up with the development process.The remaining two groups I get the same information as the above two groups, for the problems encountered are some development of the above problems.
Interactive reflection:
I feel that this time and the previous interaction is too hasty and too careless, many groups of my (Mo Lizhong) came to express do
this week learned about exceptions and assertions. Exceptions are divided into internal (set) exceptions and create class exceptions (custom exceptions), while run-time exceptions (such as stack null) are unchecked exceptions, that is, non-checked exceptions, non-runtime exceptions are check exceptions, which are checked for exceptions.All exceptions are inherited by Throwable and are broken down into error and exception.When an exception is thrown, a method may throw multiple checked exception
Experiment Report and blog post situation.Experimental report not submitted by: Cao Cheng Cheng Deng Miaomiang Mitch ren red strong Wang Ruiqiang Zhang Budan knife Jeffan (has been granted extension until November 10)Blog not written by: dai Miaomiao Zhang aravind Novi Zassi goyangsomba Li Xianglong Mau ren red strong Wang Ruiqiang Ma Lun Mitch Mao ProvencaleAccording to the experimental work, the students generally reflect the four, the fifth experiment is more difficult, most students can n
This week we learned about generic programming, which allows us to write code that is reused by many different types of objects. A generic class is a class that has one or more type variables. We can define generic classes, or we can define generic methods, which can be defined in ordinary classes and generic methods. The invocation of a generic method is to put a specific type in the angle brackets before the method name.Type variables are qualified, Wildcard characters are not type variables,
This week we have analyzed the previous procedures and learned the contents of the Nineth chapter of the collection.The next step is to strengthen the review of the knowledge we have learned, and it is also an adjustment to deepenThe process.We mainly master vector, Stack, Hashtable three classes, in the learning process moreIn-depth mastery of the ArrayList class. ArrayList implements an array that is variable in size andCan be accessed like a linked list. It provides functionality similar to t
First, the last three test cases are submitted through theSecond, study the learning StringBuffer in the way of TDD, submit the unit test case and test passThird, using [WHITESTARUML] to model the code in the experiment two, the Hair class diagram (class diagram only two fewer classes)Iv. Unit test code and running success and code-on-Cloud codes linkTask: Develop a plural class Complex in TDD, which requires the following://define properties and generate Getter,setterdouble realpart;double imag
Team members
"20162315 ma June""20162316 Liu Chenghao""20162317 Shi (group leader)""20162319 Mo Lizhong""20162320 Liu Xianyun""20162330 Liu Weikang"
Project Code Cloud Address
"Managed Links"
"Alpha Stage" Scrum Blog Summary
Alpha version Sprint stage-Day1-Sail (11.28)
Alpha version Sprint stage-Day2-Rafting (12.01)
Alpha version Sprint stage-Day3-upwind (12.02)
"Alpha Version" sprint stage-Day4-acceleration (12.03)
Alpha version Sprint stage-Day5-breakers (12.04)
In this week's study, lambda expressions, anonymous inner classes, and local inner classes have their own understanding. They are used in callback techniques to reduce the amount of code compared to previous callbacks. This programming task has played a role in reviewing the previous knowledge. Discover the knowledge that you have not mastered before. In a program that sorts names in an identity card, the result is wrong if only arrays.sort () is used to sort the array of strings that consist of
What is the price of Java training in Chengdu in 2017? How much will it cost to enroll? This is based on the class decision, that is, Java short class, short-term classes are generally about 4-6 months, so the cost will be a little different, half the cost of 10,008 up and down.Now Java training belongs to high-end pro
20165202 2017-2018-2 "Java Programming" 1th Week study summarySummary of learning contents of textbook
Installing the JDK in Ubuntu environment
Simple Java Program Writing
Anti-compiler Javap.exe
How to install and use Git
Learn how to use vim
problems in teaching materials learning and the solving process
20165312 2017-2018-2 "Java program Design" 7th Week study Summary of the last week to test the leakage of the vacancy
Overall, I think last week two tests are very difficult, do the test also took a long time, I think because the knowledge of the book a lot, I have not understood well, so still want to read more well, a lot of books on the knowledge points
20165333 2016-2017-2 "Java program design" 1th Week study summary textbook study summary
The status of Java
Features of Java
Installing the JDK
Setup of the system environment
Writing, compiling, and running Java programs
. Object-oriented programming ( Java )Section 1 Weekly Learning Guidelines and requirements ( 2017.8.24-2017.8.27 )Learning Goals
Understand the course mode and teacher teaching requirements, master the necessary software tools for curriculum learning;
Simple knowledge of Java features and history;
Understand the concepts of JVM, JRE and JDK, and learn to download, install and test jdk;
20165336 2017-2018-2 "Java program design" 1th Week study summary textbook study summary
Java status, features: Java has object-oriented, platform-independent, security, stability and multi-threaded and other excellent features. Java's platform-agnostic nature makes Java
20165205 2017-2018-2 "Java program design" Eighth Week study summary textbook study summary
Processes and Threads
A thread is not a process, but behaves like a process, and a thread is a smaller execution unit than a process.
Unlike processes, threading interrupts and restores can be more cost-efficient.
Threads in Java
A major feat
Java converts Json Date/Date (1487053489965 + 0800)/format and js time format Tue Feb 14 2017 14:06:32 GMT + 0800, json1487053489965
/Date (1487053489965 + 0800)/how to convert it to yyyy-MM-dd format in Java
How to convert Tue Feb 14 2017 14:06:32 GMT + 0800 to yyyy-MM-dd format in
20165218 2017-2018-1 "Java program design" The third week study summary textbook Learning summary-fourth chapter class and object oriented object language
The first thing to do when you need to do something is to think about who is going to accomplish the task, which object is going to accomplish the task, and what the data is about. ———— "Java 2 Practic
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