Arquivo Discussoes de Programacao e Tecnologia import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
class Main extends JFrame {
JFrame frame;
...
Main() {
frame = new JFrame("MP3 Player");
.
.
.
frame.getContentPane();
frame.setLayout(null);
frame.setSize(450,450);
frame.setVisible(true);
frame.setBackground(new Color(0,0,0));
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
public static void main(String [] args) {
Main main = new Main();
}
}
Agradeço desde já
Voce tem que colocar o setBackground num JPanel, e depois adicionar o JPanel no JFrame.
public class Main {
JFrame frame;
JPanel panel;
public Main(){
frame = new JFrame("MP3 Player");
panel = new JPanel();
frame.getContentPane();
frame.setLayout(null);
frame.setSize(450,450);
frame.setVisible(true);
panel.setBackground(new Color(0,0,0));
panel.setSize(450,450);
frame.add(panel);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
public static void main(String[] args) {
Main main = new Main();
}
}