Create ppx7dH.java

XDBS7L/ppx7dH.java

@@ -0,0 +1,164 @@
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Scanner;
+
+class User {
+    private final String username;
+    private final List<Post> posts;
+    private final List<Comment> comments;
+
+    public User(String username) {
+        this.username = username;
+        this.posts = new ArrayList<>();
+        this.comments = new ArrayList<>();
+    }
+
+    public String getUsername() {
+        return username;
+    }
+
+    public List<Post> getPosts() {
+        return posts;
+    }
+
+    public List<Comment> getComments() {
+        return comments;
+    }
+}
+
+class Post {
+    private static int postCounter = 1;
+
+    private final int postId;
+    private final String content;
+    private final User author;
+    private final List<Comment> comments;
+    private int likes;
+
+    public Post(String content, User author) {
+        this.postId = postCounter++;
+        this.content = content;
+        this.author = author;
+        this.comments = new ArrayList<>();
+        this.likes = 0;
+    }
+
+    public int getPostId() {
+        return postId;
+    }
+
+    public String getContent() {
+        return content;
+    }
+
+    public User getAuthor() {
+        return author;
+    }
+
+    public List<Comment> getComments() {
+        return comments;
+    }
+
+    public int getLikes() {
+        return likes;
+    }
+
+    public void addLike() {
+        likes++;
+    }
+
+    public void addComment(Comment comment) {
+        comments.add(comment);
+    }
+}
+
+class Comment {
+    private static int commentCounter = 1;
+
+    private final int commentId;
+    private final String content;
+    private final User author;
+
+    public Comment(String content, User author) {
+        this.commentId = commentCounter++;
+        this.content = content;
+        this.author = author;
+    }
+
+    public int getCommentId() {
+        return commentId;
+    }
+
+    public String getContent() {
+        return content;
+    }
+
+    public User getAuthor() {
+        return author;
+    }
+}
+
+public class SocialMediaPlatform {
+    private final Map<String, User> users;
+    private final List<Post> posts;
+
+    public SocialMediaPlatform() {
+        this.users = new HashMap<>();
+        this.posts = new ArrayList<>();
+    }
+
+    public User createUser(String username) {
+        User newUser = new User(username);
+        users.put(username, newUser);
+        return newUser;
+    }
+
+    public void createPost(User author, String content) {
+        Post newPost = new Post(content, author);
+        posts.add(newPost);
+        author.getPosts().add(newPost);
+    }
+
+    public void likePost(User user, Post post) {
+        post.addLike();
+    }
+
+    public void commentOnPost(User user, Post post, String content) {
+        Comment newComment = new Comment(content, user);
+        post.addComment(newComment);
+        user.getComments().add(newComment);
+    }
+
+    public void displayPosts() {
+        System.out.println("All Posts:");
+        for (Post post : posts) {
+            System.out.println("Post ID: " + post.getPostId());
+            System.out.println("Author: " + post.getAuthor().getUsername());
+            System.out.println("Content: " + post.getContent());
+            System.out.println("Likes: " + post.getLikes());
+            System.out.println("Comments:");
+            for (Comment comment : post.getComments()) {
+                System.out.println("  Comment ID: " + comment.getCommentId());
+                System.out.println("  Author: " + comment.getAuthor().getUsername());
+                System.out.println("  Content: " + comment.getContent());
+            }
+            System.out.println();
+        }
+    }
+
+    public static void main(String[] args) {
+        SocialMediaPlatform platform = new SocialMediaPlatform();
+        User user1 = platform.createUser("user1");
+        User user2 = platform.createUser("user2");
+
+        platform.createPost(user1, "Hello, this is my first post!");
+        platform.createPost(user2, "Nice to meet you all!");
+
+        platform.likePost(user1, platform.posts.get(0));
+        platform.commentOnPost(user2, platform.posts.get(0), "Welcome!");
+
+        platform.displayPosts();
+    }
+}