Not show horizontal srollbar when decrease table size

Question

import java.awt.Dimension;
import java.awt.GridLayout;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
public class SimpleTableDemo extends JPanel {
     final Object[][] data = {
               { "Mary", "Campione", "ooooooooooooooooooooooooooo", "5" },
               { "Alison", "Huml", "Rowing", "3" },
               { "Kathy", "Walrath", "Chasing toddlers", "2" },
               { "Mark", "Andrews", "Speed reading", "20" },
               { "Angela", "Lih", "Teaching high school", "4" } };
     final Object[] columnNames = { "First Name", "Last Name", "Sport",
               "Est. Years Experience" };
     public SimpleTableDemo() {
          JTable table = new JTable(data, columnNames);
          // Create the scroll pane and add the table to it.
          JScrollPane scrollPane = new JScrollPane(table);
          scrollPane.setPreferredSize(new Dimension(400, 100));
          // Add the scroll pane to this panel.
          setLayout(new GridLayout(1, 0));
          add(scrollPane);
     public static void main(String[] args) {
          JFrame frame = new JFrame("SimpleTableDemo");
          frame.addWindowListener(new WindowAdapter() {
               public void windowClosing(WindowEvent e) {
                    System.exit(0);
          frame.getContentPane().add("Center", new SimpleTableDemo());
          // frame.setSize(400, 125);
          frame.pack();
          frame.setVisible(true);
}When I decrease table size the vertical scrollbar show, but horizontal srollbar NOT show. Why?

Answer 1

When I decrease table size the vertical scrollbar show, but horizontal srollbar NOT show. Why? Because the table automatically resizes the width of each column.
If you don't want this behaviour then set the setAutoResizeMode(...) method to off.