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Main Class
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Main Class
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package abc;
import java.util.Random;
import java.util.List;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.Set;
import java.util.Scanner;
// Menu-driven Program
public class Main {
public static void main(String[] args) {
BinaryTree binaryTree = new BinaryTree();
Scanner scanner = new Scanner(System.in);
int choice;
do {
System.out.println("Menu:");
System.out.println("1. Add a song to the Music Player");
System.out.println("2. Play a random song");
System.out.println("3. Play/Pause a particular song");
System.out.println("4. Skip backward");
System.out.println("5. Skip forward");
System.out.println("6. Adjust volume control");
System.out.println("7. History");
System.out.println("8. Exit");
System.out.print("Enter your choice: ");
choice = scanner.nextInt();
switch (choice) {
case 1:
// Add a song to the Music Player
System.out.println("Enter user name: ");
scanner.nextLine(); // Consume newline character
String userName = scanner.nextLine();
System.out.println("Enter song title: ");
String title = scanner.nextLine();
System.out.println("Enter artist: ");
String artist = scanner.nextLine();
System.out.println("Enter duration (in seconds): ");
int duration = scanner.nextInt();
binaryTree.insert(userName, new Song(title, artist, duration));
break;
case 2:
// Play a random song
System.out.println("Enter user name: ");
scanner.nextLine(); // Consume newline character
String user = scanner.nextLine();
binaryTree.playRandomSong(user);
break;
case 3:
// Play/Pause a particular song
System.out.println("Enter user name: ");
scanner.nextLine(); // Consume newline character
String userPlayPause = scanner.nextLine();
System.out.println("Enter song title: ");
String songTitle = scanner.nextLine();
// Find the user node
TreeNode userNodePlayPause = binaryTree.findUser(binaryTree.getRoot(), userPlayPause);
if (userNodePlayPause != null) {
// Find the song in the user's playlist
List<Song> songList = userNodePlayPause.getSongs();
ArrayList<Song> songs = new ArrayList<>(songList);
boolean songFound = false;
for (Song song : songs) {
if (song.getTitle().equals(songTitle)) {
songFound = true;
// Toggle the play/pause state of the song
song.togglePlaying();
// Print the current state
System.out.println("Current state: " + (song.isPlaying() ? "Playing" : "Paused"));
break;
}
}
if (!songFound) {
System.out.println("Song not found in the user's playlist.");
}
} else {
System.out.println("User not found.");
}
break;
case 4:
// Skip backward
System.out.println("Enter user name: ");
scanner.nextLine(); // Consume newline character
String userBackward = scanner.nextLine();
// Find the user node
TreeNode userNodeBackward = binaryTree.findUser(binaryTree.getRoot(), userBackward);
if (userNodeBackward != null) {
System.out.println("Skipping backward for user: " + userBackward);
// Implement skip backward logic here
} else {
System.out.println("User not found.");
}
break;
case 5:
// Skip forward
System.out.println("Enter user name: ");
scanner.nextLine(); // Consume newline character
String userForward = scanner.nextLine();
// Find the user node
TreeNode userNodeForward = binaryTree.findUser(binaryTree.getRoot(), userForward);
if (userNodeForward != null) {
System.out.println("Skipping forward for user: " + userForward);
// Implement skip forward logic here
} else {
System.out.println("User not found.");
}
break;
case 6:
// Adjust volume control
System.out.println("\n-- Adjust volume control --");
System.out.print("Enter user name: ");
scanner.nextLine(); // Consume newline character
String userVolume = scanner.nextLine();
System.out.print("Enter volume level (0-100): ");
int volumeLevel = scanner.nextInt();
// Find the user node and adjust volume
binaryTree.adjustVolume(userVolume, volumeLevel);
break;
case 7:
// View history of played songs
System.out.println("\n-- View History of Played Songs --");
System.out.print("Enter user name: ");
scanner.nextLine(); // Consume newline character
String userHistory = scanner.nextLine();
TreeNode userNodeHistory = binaryTree.findUser(binaryTree.getRoot(), userHistory);
if (userNodeHistory != null) {
List<Song> history = userNodeHistory.getHistory();
if (!history.isEmpty()) {
System.out.println("History of played songs for user " + userHistory + ":");
for (Song song : history) {
System.out.println("- " + song.getTitle() + " by " + song.getArtist());
}
} else {
System.out.println("No songs played yet for user: " + userHistory);
}
} else {
System.out.println("User not found.");
}
break;
case 8:
System.out.println("Exiting...");
break;
default:
System.out.println("Invalid choice. Please enter a number between 1 and 8.");
}
} while (choice != 7);
scanner.close();
}
}