List练习

1、编写图书类Book 有id编号,author作者，title标题，price价格，createTime 创建时间
2、定义集合初始化5本图书，并显示
3、选择菜单 1、添加图书 2、删除图书 3、修改图书 4、查找图书
》添加图书
控制台输入图书信息，添加到集合中
》删除图书
控制台输入要删除的图书名称，从集合中查找 并删除
》修改图书
控制台输入图书名称，输入更新之后的价格和时间， 更新到集合中。
》查找图书
控制台输入图书名称，到集合中查询，

每个功能可写一个方法实现。可动态传参

public class Book {
private int id;
private String author;
private String title;
private String price;
private int createTime;

public void print(){
    System.out.println("编号："+this.id+"，作者："+this.author+"，标题："+this.title+"，价格："+this.price+"，创建时间："+this.createTime);
}

public Book(){}

public Book(int id, String author, String title, String price, int createTime) {
    this.id = id;
    this.author = author;
    this.title = title;
    this.price = price;
    this.createTime = createTime;
}

public int getId() {
    return id;
}

public void setId(int id) {
    this.id = id;
}

public String getAuthor() {
    return author;
}

public void setAuthor(String author) {
    this.author = author;
}

public String getTitle() {
    return title;
}

public void setTitle(String title) {
    this.title = title;
}

public String getPrice() {
    return price;
}

public void setPrice(String price) {
    this.price = price;
}

public int getCreateTime() {
    return createTime;
}

public void setCreateTime(int createTime) {
    this.createTime = createTime;
}

}

import java.util.Iterator;
import java.util.LinkedList;
import java.util.Scanner;

public class OpBook {
Scanner input = new Scanner(System.in);

public void Add(LinkedList<Book> books){
    Book book = new Book();
    boolean flag = true;
    System.out.println("请输入编号：");
    int id = input.nextInt();
    System.out.println("请输入作者：");
    String author = input.next();
    System.out.println("请输入标题：");
    String title = input.next();
    System.out.println("请输入价格：");
    String price = input.next();
    System.out.println("请输入创建时间：");
    int createTime = input.nextInt();
    book.setId(id);
    book.setAuthor(author);
    book.setPrice(price);
    book.setTitle(title);
    book.setCreateTime(createTime);
    for (int i = 0; i < books.size(); i++) {
        if (books.get(i).getTitle().equals(book.getTitle())){
            System.out.println("该书存在。");
            flag = false;
            break;
        }
    }
    if (flag == true){
        books.add(book);
    }
}

public void remove(LinkedList<Book> book){
    System.out.println("请输入要删除的图书名称：");
    boolean flag = false;
    int i;
    String name = input.next();
    for (i = 0; i < book.size(); i++) {
        if (book.get(i).getTitle().equals(name)){
            flag =true;
            break;
        }else {
            flag =false;
        }
    }
    if (flag){
        book.remove(i);
        System.out.println("删除成功。");
    }else {
        System.out.println("图书不存在。");
    }
}

public void update(LinkedList<Book> book){
    boolean flag = false;
    int i=0;
    System.out.println("请输入要修改的图书名称：");
    String name = input.next();
    System.out.println("请输入修改后的价格：");
    String price = input.next();
    System.out.println("请输入修改后的时间：");
    int time = input.nextInt();
    for (i = 0; i < book.size(); i++) {
        if (book.get(i).getTitle().equals(name)){
            flag =true;
            break;
        }
    }
    if (flag){
        book.get(i).setPrice(price);
        book.get(i).setCreateTime(time);
        System.out.println("修改成功。");
    }else {
        System.out.println("没有该图书。");
    }
}

public void sert(LinkedList<Book> book){
    int i;
    boolean flag = false;
    System.out.println("请输入要查找的图书名称：");
    String name = input.next();
    for (i = 0; i < book.size(); i++) {
        if (book.get(i).getTitle().equals(name)){
            flag = true;
            break;
        }else {
            flag = false;
        }
    }
    if (flag){
        System.out.println("编号："+book.get(i).getId()+
                "，作者："+book.get(i).getAuthor()+
                "，标题："+book.get(i).getTitle()+
                "，价格："+book.get(i).getPrice()+
                "，创建时间："+book.get(i).getCreateTime());
    }else {
        System.out.println("没有该图书。");
    }
}

public void cz(LinkedList book){
    Iterator<Book> it = book.iterator();
    while (it.hasNext()){
        it.next().print();
    }
}

public void init(LinkedList<Book> books){
    Book book1 = new Book(1,"zzx","Java","10",10);
    Book book2 = new Book(2,"gyy","MySql","10",20);
    Book book3 = new Book(3,"xxx","html","10",30);
    Book book4 = new Book(4,"zzz","vs","10",40);
    Book book5 = new Book(5,"sss","boot","10",50);
    OpBook ob = new OpBook();
    books.add(book1);
    books.add(book2);
    books.add(book3);
    books.add(book4);
    books.add(book5);
    ob.cz(books);
}

}
import java.util.LinkedList;
import java.util.Scanner;

public class Test {
public static void main(String[] args) {
LinkedList books = new LinkedList();
OpBook ob = new OpBook();
ob.init(books);

    boolean flag = true;

    while (flag) {
        System.out.println("1、添加图书");
        System.out.println("2、删除图书");
        System.out.println("3、修改图书");
        System.out.println("4、查找图书");
        Scanner input = new Scanner(System.in);

        System.out.println("请选择：（1 2 3 4）");
        int choose = input.nextInt();
        if (choose == 1) {
            ob.Add(books);
            ob.cz(books);
        } else if (choose == 2) {
            ob.remove(books);
            ob.cz(books);
        } else if (choose == 3) {
            ob.update(books);
            ob.cz(books);
        } else if (choose == 4) {
            ob.sert(books);
        }
        System.out.println("继续么？（y/n）");
        String i = input.next();
        if (i.equals("y")){
            flag =true;
        }else {
            flag = false;
        }
    }
}

}