Help please!!!!!

Im having trouble. Whenever I try to run this code, it closes right away and I can't figure out why and i want to figure this out.















Heres the code:

import java.util.Random;

import java.util.Scanner;















import java.awt.*;

import javax.swing.*;















import javax.swing.JFrame;















import javax.swing.JPanel;















class magic8ball extends JPanel {

public static void main(String[] args)















{

int number;















Random myRandom = new Random();















Scanner myScanner = new Scanner(System.in);















number = myRandom.nextInt(1) + 1;}















public void paintComponent1(Graphics g) {

Random myRandom = new Random();















int number = myRandom.nextInt(1) + 1;;















switch (number)















{

case 1:















g.setColor(Color. MAGENTA);















g.fillRect(0,0,3000,3000);















g.setColor(Color. black);















g.fillOval(300,300,100,100);

break;















}















}

public magic8ball () {

}















public void paintComponent(Graphics g) {















super.paintComponent(g);















{

}















}

{















magic8ball t = new magic8ball();















JFrame jf = new JFrame();















jf.setTitle("box");















jf.setSize(600,400);















jf.setVisible(true);















jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);















jf.add(t);

}















}