Java Homework

It is just a backup of my Java homework. Thanks to my Java teacher Jie LI. 😄

Contents

Homework 1: Class and Array

Simple.

Homework 2: Exception

Defined two exception classes named ScoreException, StudentNumberException based on the homework 1. Throw exceptions when the input is invalid.

Homework 3: Inheritance and Polymorphism(多态)

Use inheritance to define the following 5 classes:

Homework 4: Collection(群体对象)

Based on the homework 3, defined a class named factory and save all the employees into its HashMap.

Homework 5: GUI

Designed a graphic user interface to input the employee and calculate their average salary information based on the homework 3.

Homework 6: Design Pattern Practice 1(Singleton Pattern, Factory Pattern and Strategy Pattern)

Designed an online shopping system(actually it's not online). The relations of the classes in the system is shown below.

Homework 7: Design Pattern Practice 2 (More complex)

Use Singleton Pattern, Factory Pattern, Strategy Pattern, Composite Pattern, Observer Pattern to build a online shopping system, and use Swing to design a graphic user interface for it.

In the end, this is my class diagram which is generated by Eclipse Java Oxygen:

And these is the screenshot of my online shopping system, which is recorded by ScreenToGif:

It's really fun!

Compile and Run

Note that you may fail to compile due to encoding. If you encouter encoding problems, please add the parameter -encoding UTF-8.

Homework 1

javac StudentTest.java
java StudentTest

javac StudentListTest.java
java StudentListTest

Homework 2

javac StudentTest.java
java StudentTest

Homework 3 and 4

javac Main.java
java Main

Homework 5

javac MainWindow.java
java MainWindow

Homework 6

javac Sale.java
java Sale

It's a simple version of Homework 7. It just output the total price.

Homework 7

javac MainUI.java
java MainUI

Documentation

All the 7 problems are in the docs folder.