Chatbot Tutorial

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JFrame;
import javax.swing.JTextArea;
import javax.swing.JTextField;


public class Bot extends JFrame {

    //Typing Area:
    private JTextField txtEnter = new JTextField();

    //Chat Area:
    private JTextArea txtChat = new JTextArea();

    public Bot() {
        //Frame Attributes:
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        this.setSize(600, 600);
        this.setVisible(true);
        this.setResizable(false);
        this.setLayout(null);
        this.setTitle("Java AI");

        //txtEnter Attributes:
        txtEnter.setLocation(2, 540);
        txtEnter.setSize(590, 30);

        //txtEnter Action Event:
        txtEnter.addActionListener(new ActionListener(){
            public void actionPerformed(ActionEvent arg0) {
                String uText = txtEnter.getText();
                txtChat.append("You: " + uText + "\n");

                if(uText.contains("hi")){
                    botSay("Hello there!");
                }
                else if(uText.contains("how are you")){
                    int decider = (int) (Math.random()*2+1);
                    if(decider == 1){
                        botSay("I'm doing well, thanks");
                    }
                    else if(decider == 2){
                        botSay("Not too bad");
                    }
                }
                else{
                    int decider = (int) (Math.random()*3+1);
                    if(decider == 1){
                        botSay("I didn't get that");
                    }
                    else if(decider == 2){
                        botSay("Please rephrase that");
                    }
                    else if(decider == 3){
                        botSay("???");
                    }
                }
                txtEnter.setText("");
            }
        });

        //txtChat Attributes:
        txtChat.setLocation(15, 5);
        txtChat.setSize(560, 510);
        txtChat.setEditable(false);

        //Add Items To Frame:
        this.add(txtEnter);
        this.add(txtChat);
    }

    public void botSay(String s){
        txtChat.append("AI: " + s + "\n");
    }

    public static void main(String[] args){
        new Bot();
    }

}