Why the JTable do not display in the JFrame? Thanks!

Question

Why the JTable do not display in the JFrame?
Thanks for your help.
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class test extends JFrame implements ActionListener {
     JButton button=new JButton("Click");
     public test(){
          JFrame frame=new JFrame("abc");
     frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
          frame.getContentPane().add(button, BorderLayout.NORTH);
          button.addActionListener(this);
          frame.setVisible(true);
     public void actionPerformed(ActionEvent event) {
          String[] columnNames = {"First Name","Last Name","Sport","# of Years","Vegetarian"};
          Object[][] data = {{"Mary", "Campione","Snowboarding", new Integer(5), new Boolean(false)}};
          JTable table = new JTable(data, columnNames);
          table.setPreferredScrollableViewportSize(new Dimension(500, 70));
          JScrollPane scrollPane = new JScrollPane(table);
     getContentPane().add(scrollPane, BorderLayout.NORTH);
     public static void main(String args[]){
          test t=new test();
}

Answer 1

Problem solved.
Thanks!