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Project2.java
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Project2.java
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import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
class Project2 implements ActionListener {
private JFrame frame;
private JFrame userView;
private JTextArea jta;
private JTextArea userId;
private JTextArea groupId;
private JTextArea following;
private JTextArea newsFeed;
private JTextArea userId2;
private JTextArea tweet;
public Project2() {
frame = new JFrame("");
frame.setLayout(new GridLayout(2, 2));
frame.setSize(300, 500);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
jta = new JTextArea("Tree View", 17, 25);
jta.setBorder(BorderFactory.createLineBorder(Color.BLACK, 2));
jta.setEditable(false);
frame.add(jta);
userId = new JTextArea("User Id");
groupId = new JTextArea("Group Id");
JButton addUser = new JButton("Add User");
JButton addGroup= new JButton("Add Group");
JButton openUserView= new JButton("Open User View");
JButton showUserTotal= new JButton("Show User Total");
JButton showGroupTotal = new JButton("Show Group Total");
JButton showMessagesTotal = new JButton("Show Messages Total");
JButton showPositivePercentage = new JButton("Show Positive Percentage");
addUser.addActionListener(this);
addGroup.addActionListener(this);
openUserView.addActionListener(this);
showUserTotal.addActionListener(this);
showGroupTotal.addActionListener(this);
showMessagesTotal.addActionListener(this);
showPositivePercentage.addActionListener(this);
JPanel buttonPanel = new JPanel();
buttonPanel.setLayout(new GridLayout(5, 2));
buttonPanel.add(userId);
buttonPanel.add(addUser);
buttonPanel.add(groupId);
buttonPanel.add(addGroup);
buttonPanel.add(openUserView);
buttonPanel.add(showUserTotal);
buttonPanel.add(showGroupTotal);
buttonPanel.add(showMessagesTotal);
buttonPanel.add(showPositivePercentage);
frame.add(buttonPanel);
frame.setVisible(true);
userView = new JFrame("");
userView.setLayout(new GridLayout(2, 2));
userView.setSize(300,500);
following = new JTextArea("Current Following", 17, 5);
following.setBorder(BorderFactory.createLineBorder(Color.BLACK, 2));
JButton followUser = new JButton("Follow User");
userId2 = new JTextArea("User Id");
JPanel followingPanel = new JPanel();
followingPanel.setLayout(new GridLayout(2, 2));
followingPanel.add(userId2);
followingPanel.add(followUser);
followingPanel.add(following);
userView.add(followingPanel);
tweet = new JTextArea("Tweet Message");
JButton postTweet = new JButton("Post Tweet");
newsFeed = new JTextArea("News Feed", 30, 5);
newsFeed.setBorder(BorderFactory.createLineBorder(Color.BLACK, 2));
newsFeed.setEditable(false);
postTweet.addActionListener(this);
followUser.addActionListener(this);
JPanel tweetPanel = new JPanel();
tweetPanel.setLayout(new GridLayout(2, 2));
tweetPanel.add(tweet);
tweetPanel.add(postTweet);
tweetPanel.add(newsFeed);
userView.add(tweetPanel);
}
public void actionPerformed(ActionEvent ae) {
if (ae.getActionCommand().equals("Add User")) {
jta.append("\n" + userId.getText());
User user = new User(userId.getText());
}
else if (ae.getActionCommand().equals("Add Group")) {
jta.append("\n" + groupId.getText());
Group group = new Group(groupId.getText());
}
else if (ae.getActionCommand().equals("Open User View")) {
try {
if (!jta.getSelectedText().equals("null")) {
userView.setVisible(true);
}
}
catch (Exception e) {
JOptionPane.showMessageDialog(frame, "Nothing selected", "Error", JOptionPane.ERROR_MESSAGE);
}
}
else if (ae.getActionCommand().equals("Show User Total")) {
JOptionPane.showMessageDialog(frame, User.getUserTotal());
}
else if (ae.getActionCommand().equals("Show Group Total")) {
JOptionPane.showMessageDialog(frame, Group.getGroupTotal());
}
else if (ae.getActionCommand().equals("Show Messages Total")) {
JOptionPane.showMessageDialog(frame, User.getMessageTotal());
}
else if (ae.getActionCommand().equals("Show Positive Percentage")) {
String[] newsFeed = User.getNewsFeed();
int positive = 0;
int i = 0;
while (!(newsFeed[i] == null)) {
if (newsFeed[i].contains("good") || newsFeed[i].contains("great") || newsFeed[i].contains("excellent"))
positive++;
i++;
}
JOptionPane.showMessageDialog(frame, positive * 100.0/i + "%");
}
else if (ae.getActionCommand().equals("Follow User")) {
following.append("\n" + userId2.getText());
}
else if (ae.getActionCommand().equals("Post Tweet")) {
User.postTweet(tweet.getText());
newsFeed.append("\n" + jta.getSelectedText() + ": " + tweet.getText());
}
}
public static void main(String args[]) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
new Project2();
}
});
}
}
class User {
private String id;
private String[] following; //List<String>
private String[] followers;
private static int userTotal = 0;
private static String[] newsFeed = new String[10];
private static int currentIndex = 0;
public User (String id) {
this.id = id;
userTotal++;
}
public static void postTweet (String text) {
newsFeed[currentIndex] = text;
currentIndex++;
}
public static int getUserTotal () {
return userTotal;
}
public static String[] getNewsFeed () {
return newsFeed;
}
public static int getMessageTotal () {
return currentIndex;
}
}
class Group {
private String id;
private String[] users;
private static int groupTotal = 0;
public Group(String id) {
this.id = id;
groupTotal++;
}
public static int getGroupTotal () {
return groupTotal;
}
}