GUI.java

package robowebert;

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

import javax.swing.JButton;
import javax.swing.JFileChooser;
import javax.swing.JFrame;

public class GUI extends JFrame{
    private static final long serialVersionUID = 1L;
    private MP3Player kernel = MP3Player.getInstance();

    public GUI(){
        setTitle("MP3 Player");
        setLayout(new FlowLayout());
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        JButton select = new JButton("Selecionar"), play = new JButton("Reproduzir"), stop = new JButton("Parar");
        select.addActionListener(new ActionListener(){
            public void actionPerformed(ActionEvent paige){
                JFileChooser chooser = new JFileChooser();
                if(chooser.showOpenDialog(GUI.this) == JFileChooser.APPROVE_OPTION) kernel.setMP3(chooser.getSelectedFile());
            }
        });
        play.addActionListener(new ActionListener(){
            public void actionPerformed(ActionEvent piper){
                kernel.play();
            }
        });
        stop.addActionListener(new ActionListener(){
            public void actionPerformed(ActionEvent piper){
                kernel.stop();
            }
        });
        getContentPane().add(select);
        getContentPane().add(play);
        getContentPane().add(stop);
        pack();
        setVisible(true);
    }
}