FULL PRODUCT VERSION :
java version " 1.8.0-ea "
Java(TM) SE Runtime Environment (build 1.8.0-ea-b102)
Java HotSpot(TM) Server VM (build 25.0-b44, mixed mode)


ADDITIONAL OS VERSION INFORMATION :
Ubuntu 12.04 - 3.2.0-52-generic-pae

A DESCRIPTION OF THE PROBLEM :
I am using a default-cell-renderer for java.util.Date-columns on a JTable.
Up to Java 7 that works as expected.
With Java 8 the rendering is badly broken (on all available LookAndFeels).


REGRESSION. Last worked in version 7u40

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Compile an run the testprogram.
Scroll up and down the table-rows with keyboard and watch the columns drawings.


EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Normal rendering of the table-rows.
ACTUAL -
Broken rendering of the table-rows which use a DefaultCellRenderer.
For example: wrong background-color, text of other cells is written over current cell, ...


REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.EventQueue;
import java.text.SimpleDateFormat;
import java.util.Date;

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.UIManager;
import javax.swing.WindowConstants;
import javax.swing.plaf.nimbus.NimbusLookAndFeel;
import javax.swing.table.AbstractTableModel;
import javax.swing.table.DefaultTableCellRenderer;

public class TestTable
  implements Runnable {

  static class TM
    extends AbstractTableModel {
    static Class<?>[] clazzes = { Number.class, Date.class, String.class };

    @Override
    public int getColumnCount() {
      return clazzes.length;
    }

    @Override
    public Class<?> getColumnClass(final int columnIndex) {
      return clazzes[columnIndex];
    }

    @Override
    public String getColumnName(final int column) {
      return clazzes[column].getSimpleName();
    }

    @Override
    public int getRowCount() {
      return 5000;
    }

    @Override
    public Object getValueAt(final int rowIndex, final int columnIndex) {
      switch (columnIndex) {
        case 0:
          return Integer.valueOf(rowIndex);
        case 1:
          return new Date();
        case 2:
          return String.valueOf(rowIndex);
        default:
          break;
      }
      return null;
    }

  }

  JPanel p;
  JTable t;
  boolean doDateRenderer;

  public TestTable() {
    super();
    createComps();
  }

  protected void createComps() {
    try {
      // for (final LookAndFeelInfo laf : UIManager.getInstalledLookAndFeels())
      // System.out.println(laf);
      // Metal javax.swing.plaf.metal.MetalLookAndFeel
      // Nimbus javax.swing.plaf.nimbus.NimbusLookAndFeel
      // CDE/Motif com.sun.java.swing.plaf.motif.MotifLookAndFeel
      // GTK+ com.sun.java.swing.plaf.gtk.GTKLookAndFeel
      // UIManager.setLookAndFeel(GTKLookAndFeel.class.getName());
      // UIManager.setLookAndFeel(MetalLookAndFeel.class.getName());
      // UIManager.setLookAndFeel(MotifLookAndFeel.class.getName());
      UIManager.setLookAndFeel(NimbusLookAndFeel.class.getName());
    } catch (final Exception e) {
      e.printStackTrace();
    }
    p = new JPanel(new BorderLayout());
    t = new JTable(new TM());
    doDateRenderer = true;
    if (doDateRenderer)
      t.setDefaultRenderer(Date.class, new DefaultTableCellRenderer() {
        final SimpleDateFormat sdf =
          new SimpleDateFormat( " yyyy-MM-dd HH:mm:ss " );

        @Override
        public Component getTableCellRendererComponent(final JTable table,
          final Object value, final boolean isSelected, final boolean hasFocus,
          final int row, final int column) {
          return super.getTableCellRendererComponent(table, sdf.format(value),
            isSelected, hasFocus, row, column);
        }
      });
    p.add(new JScrollPane(t), BorderLayout.CENTER);
  }

  @Override
  public void run() {
    final JFrame f = new JFrame( " Tabletest " );
    f.setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
    f.getContentPane().add(p);
    f.pack();
    f.setSize(800, 600);
    f.setVisible(true);
  }

  public static void main(final String[] args) {
    EventQueue.invokeLater(new TestTable());
  }
}

---------- END SOURCE ----------