Post.java

import java.time.LocalDateTime;

public class Post {
    private String postId;
    private String userId;
    private String content;
    private LocalDateTime timestamp;
    
    public Post(String postId, String userId, String content) {
        this.postId = postId;
        this.userId = userId;
        this.content = content;
        this.timestamp = LocalDateTime.now();
    }
    
    public Post(String postId, String userId, String content, LocalDateTime timestamp) {
        this.postId = postId;
        this.userId = userId;
        this.content = content;
        this.timestamp = timestamp;
    }
    
    public String getPostId() {
        return postId;
    }
    
    public String getUserId() {
        return userId;
    }
    
    public String getContent() {
        return content;
    }
    
    public LocalDateTime getTimestamp() {
        return timestamp;
    }
    
    @Override
    public String toString() {
        return "Post{" +
                "postId='" + postId + '\'' +
                ", userId='" + userId + '\'' +
                ", content='" + content + '\'' +
                ", timestamp=" + timestamp +
                '}';
    }
}