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);

}































}