項目類import java.io.*; interface Item { void read(); void show(); } class Book implements Item { String name,author,publication; public void read() { Console con = System.console(); System.out.println("Enter Name of the Book:"); name = con.readLine(); System.out.println("Enter Author Name:"); author = con.readLine(); System.out.println("Enter Publication of the book:"); publication = con.readLine(); } public void show() { System.out.println("List Of Issued Items"); System.out.println("Name :"+name); System.out.println("Author :"+author); System.out.println("Publication :"+publication); } } class Dvd implements Item { String dname,director,category; public void read() { Console con = System.console(); System.out.println("Enter Name of the dvd "); dname = con.readLine(); System.out.println("Enter Director Name"); director = con.readLine(); System.out.println("Enter Category of the dvd: "); category = con.readLine(); } public void show() { System.out.println("List Of Issued Items"); System.out.println("Name :"+dname); System.out.println("Director :"+director); System.out.println("Category :"+category); } }庫類import java.io.*;class Library { public static void main(String args[]) { Console con = System.console(); Item arr[] = new Item[2]; Item a; for(int i=0;i<arr.length;i++) { System.out.println("Enter Your Choice : < b / d >"); String ch = con.readLine(); } } }}如同此代碼一樣，我創建了兩個類，即項目和圖書館 .在運行時，動態綁定成功完成，但在讀取任何選項后，它會同時顯示結果，并且我想在首先輸入所有選項后顯示所有結果。為了存儲引用，我使用了數組來存儲我選擇的類型的引用。
1 回答
桃花長相依
TA貢獻1860條經驗 獲得超8個贊
**//類項目很好**
import java.io.*;
interface Item {
void read();
void show();
}
class Book implements Item {
String name,author,publication;
public void read() {
Console con = System.console();
System.out.println("Enter Name of the Book:");
name = con.readLine();
System.out.println("Enter Author Name:");
author = con.readLine();
System.out.println("Enter Publication of the book:");
publication = con.readLine();
}
public void show() {
System.out.println("List Of Issued Items");
System.out.println("Name :"+name);
System.out.println("Author :"+author);
System.out.println("Publication :"+publication);
}
}
class Dvd implements Item {
String dname,director,category;
public void read() {
Console con = System.console();
System.out.println("Enter Name of the dvd ");
dname = con.readLine();
System.out.println("Enter Director Name");
director = con.readLine();
System.out.println("Enter Category of the dvd: ");
category = con.readLine();
}
public void show() {
System.out.println("List Of Issued Items");
System.out.println("Name :"+dname);
System.out.println("Director :"+director);
System.out.println("Category :"+category);
}
}
類庫
import java.io.*;
class Library {
public static void main(String args[]) {
Console con = System.console();
Item arr[] = new Item[2];
Item a;
for(int i=0;i<arr.length;i++)
{
System.out.println("Enter Your Choice : < b / d >");
String ch = con.readLine();
switch(ch)
{
case "b":
arr[i] = new Book();
arr[i].read();
break;
case "d":
arr[i] = new Dvd();
arr[i].read();
break;
default:
System.out.println(" You Enetred The Wrong Choice !!!");
}
}
for(int i=0;i<arr.length;i++)
arr[i].show();
}
}
添加回答
舉報
0/150
提交
取消