Here, notice that the end of a string is marked "end of text"
import java.awt.Component;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextPane;
import javax.swing.table.AbstractTableModel;
import java.awt.Dimension;
import java.awt.GridLayout;
import javax.swing.table.DefaultTableCellRenderer;
import javax.swing.table.TableColumn;
import javax.swing.table.TableColumnModel;

public class TableDemo extends JPanel {

   public TableDemo() {
       super(new GridLayout(1,0));

       JTable table = new JTable(new MyTableModel());

       // Set renderers
       TableColumn col = table.getColumnModel().getColumn(0);
       col.setCellRenderer(new MyRenderer());

       col = table.getColumnModel().getColumn(1);
       col.setCellRenderer(new MyRenderer());

       col = table.getColumnModel().getColumn(2);
       col.setCellRenderer(new MyRenderer());

       table.setPreferredScrollableViewportSize(new Dimension(500,
70));

       //Create the scroll pane and add the table to it.
       JScrollPane scrollPane = new JScrollPane(table);

       //Add the scroll pane to this panel.
       add(scrollPane);
   }
   class MyRenderer extends  DefaultTableCellRenderer {
       private JTextPane component = new JTextPane();
       public MyRenderer() {
           component.setOpaque(true);
       }

       public Component getTableCellRendererComponent(JTable table,
                                                      Object value,
                                                      boolean
isSelected,
                                                      boolean
hasFocus,
                                                      int row, int
column) {

super.getTableCellRendererComponent(table,value,isSelected,hasFocus,row,column);

           component.setText((String)value);

           // Set the size
           TableColumnModel columnModel = table.getColumnModel();

           component.setMinimumSize(new
Dimension(columnModel.getColumn(column).getWidth(),
(int)component.getPreferredSize().getHeight()));
           component.setMaximumSize(new
Dimension(columnModel.getColumn(column).getWidth(),
(int)component.getPreferredSize().getHeight()));

           if (component.getPreferredSize().getHeight() >
table.getRowHeight(row)){
               table.setRowHeight(row,
(int)component.getPreferredSize().getHeight());
           }

           return component;
       }
  }

   class MyTableModel extends AbstractTableModel {
       private String[] columnNames = {"First Name",
                                       "Last Name",
                                       "Sport",
                                       "# of Years",
                                       "Vegetarian"};
       private Object[][] data = {
           {"Mary\nMary end of text", "Campione blahblahblah
blahblahblahblah  blahblahblahblahblah  blahblahblahblahblah end of
text",
            "Snowboarding\nSnowboarding\nend of text", new Integer(5),
new Boolean(false)},
            {"Mary end of text", "Campione blahblahblah
blahblahblahblah  blahblahblahblahblah  blahblahblahblahblah
blahblahblahblahblah  blahblahblahblahblah  blahblahblahblahblah
blahblahblahblahblah  blahblahblahblahblah  blahblahblahblahblah
blahblahblahblahblah  blahblahblahblahblah  blahblahblahblahblah
blahblahblahblahblah end of text",

"Snowboarding\nSnowboarding\nSnowboarding\nSnowboarding\nSnowboarding\nSnowboarding\nSnowboarding\nend
of text", new Integer(5), new Boolean(false)}};

       public Object getValueAt(int row, int col) {
           return data[row][col];
       }

       public int getRowCount()  {
         return 2;
       }

       public int getColumnCount()  {
         return 5;
       }
  }

   private static void createAndShowGUI() {
       //Create and set up the window.
       JFrame frame = new JFrame("TableDemo");
       frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

       //Create and set up the content pane.
       TableDemo newContentPane = new TableDemo();
       newContentPane.setOpaque(true); //content panes must be opaque
       frame.setContentPane(newContentPane);

       //Display the window.
       frame.pack();
       frame.setVisible(true);
   }

   public static void main(String[] args) {
       javax.swing.SwingUtilities.invokeLater(new Runnable() {
           public void run() {
               createAndShowGUI();
           }
       });
   }
}