Add 代码1

代码1

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+import java.util.Scanner;
+
+//股票类
+
+class Stock{
+    public String symbol;
+    public String name;
+    public double previousClosingPrice;
+    public double currentPrice;
+    Stock(String symbol,String name)
+    {
+        this.symbol = symbol;
+        this.name = name;
+    }
+    double changPercent()
+    {
+        return (currentPrice/previousClosingPrice)-1;
+    }
+}
+
+public class Educode{
+    public static void main(String[] args) {
+        Scanner input = new Scanner(System.in);
+        String symbol = input.next();
+        String name = input.next();
+        Stock stock = new Stock(symbol,name);
+        stock.previousClosingPrice = input.nextDouble();
+        stock.currentPrice = input.nextDouble();
+        System.out.printf("%s price changed: %.3f%%\n", stock.name,stock.changPercent());
+    }
+}
+
+
+
+
+//传播媒体类
+
+import java.util.Scanner;
+
+abstract class Media{
+    private String id;
+    private String title;
+    private static String type = "Media";
+
+    Media(String id,String title)
+    {
+        this.id = id;
+        this.title = title;
+    }
+    String getId() {
+        return id;
+    }
+    String getTitle(){
+        return title;
+    }
+    abstract void showInfomation();
+    static void showType()
+    {
+        System.out.println("类型："+type);
+    }
+}
+
+class Book extends Media{
+    private String press;
+    private String author;
+    Book(String id,String title,String press,String author){
+        super(id,title);
+        this.press=press;
+        this.author=author;
+    }
+    String getPress(){
+        return press;
+    }
+    String getAuthor(){
+        return author;
+    }
+    @Override
+    void showInfomation(){
+        System.out.println("ID: "+this.getId()+", Title: "+ this.getTitle()+ ", "+this.getPress()+", Author: "+this.getAuthor());
+    }
+}
+
+
+class NewsPaper extends Media{
+    NewsPaper(String id,String title){
+        super(id,title);
+    }
+    void showInfomation(){
+        System.out.println("ID: "+this.getId()+", Title: "+this.getTitle());
+    }
+}
+
+public class Educode{
+    public static void main(String[] args) {
+        Media[] medias = new Media[2];
+        Scanner input = new Scanner(System.in);
+        String id = input.nextLine();
+        String title = input.nextLine();
+        String press = input.nextLine();
+        String author = input.nextLine();
+        medias[0] = new Book(id,title,press,author);
+        id = input.nextLine();
+        title = input.nextLine();
+        medias[1] = new NewsPaper(id,title);
+        Media.showType();
+        for (Media a : medias){
+            a.showInfomation();
+        }
+    }
+}
+