79 lines
1.5 KiB
Java
79 lines
1.5 KiB
Java
/*
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* Author: CHEN Yongyuan (Walter) 1930006025 from OOP(1007)
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* Date: 2022-04-25
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* Description: This is the User class.
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*/
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public abstract class User implements IUser {
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/**
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* The user's name.
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*/
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private String name;
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/**
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* The number of books borrowed by the user.
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*/
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private int book;
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/**
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* Constructor.
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*
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* @param name The user's name.
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* @param book The number of books borrowed by the user.
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*/
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public User(String name, int book) {
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this.name = name;
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this.book = book;
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}
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/**
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* Getter of the user's name.
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*
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* @return The user's name.
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*/
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public String getName() {
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return name;
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}
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/**
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* Getter of the number of books borrowed by the user.
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*
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* @return The number of books borrowed by the user.
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*/
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public int getBook() {
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return book;
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}
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/**
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* Change the number of books borrowed by the user.
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*
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* @param book The number of books borrowed by the user.
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*/
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protected void setBook(int book) {
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this.book = book;
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}
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/**
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* Increase the number of books borrowed by the user.
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*
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* @param book The number of books borrowed by the user.
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*/
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public abstract void moreBook(int number);
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/**
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* Test.
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*/
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public static void testUser() {
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User user = new User("Walter", 3) {
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@Override
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public void moreBook(int number) {
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setBook(getBook() + number);
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}
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};
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System.out.println(user.getName() == "Walter");
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System.out.println(user.getBook() == 3);
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user.moreBook(2);
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System.out.println(user.getBook() == 5);
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}
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}
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