Вот что получилось:
| Код |
import java.awt.Color;
import java.awt.Component;
import java.awt.Font;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseMotionAdapter;
import javax.swing.BorderFactory;
import javax.swing.JLabel;
import javax.swing.JTable;
import javax.swing.border.BevelBorder;
import javax.swing.table.DefaultTableCellRenderer;
public class NewJFrame extends javax.swing.JFrame {
/** Creates new form NewJFrame */
public NewJFrame() {
setLocationRelativeTo(null);
initComponents();
pack();
jTable1.getTableHeader().setDefaultRenderer(new MyHeaderRenderer());
jTable1.getTableHeader().addMouseListener(new MouseAdapter() {
public void mouseExited(MouseEvent e) {
MyHeaderRenderer r = (MyHeaderRenderer) jTable1.getTableHeader().getDefaultRenderer();
r.setPos(-1);
jTable1.getTableHeader().repaint();
}
});
jTable1.getTableHeader().addMouseMotionListener(new MouseMotionAdapter() {
public void mouseMoved(MouseEvent e) {
super.mouseMoved(e);
MyHeaderRenderer r = (MyHeaderRenderer) jTable1.getTableHeader().getDefaultRenderer();
r.setPos(jTable1.columnAtPoint(e.getPoint()));
jTable1.getTableHeader().repaint();
}
});
}
private void initComponents() {
jScrollPane1 = new javax.swing.JScrollPane();
jTable1 = new javax.swing.JTable();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jTable1.setModel(new javax.swing.table.DefaultTableModel(
new Object [][] {
{null, null, null, null},
{null, null, null, null},
{null, null, null, null},
{null, null, null, null}
},
new String [] {
"Title 1", "Title 2", "Title 3", "Title 4"
}
));
jScrollPane1.setViewportView(jTable1);
getContentPane().add(jScrollPane1, java.awt.BorderLayout.CENTER);
java.awt.Dimension screenSize = java.awt.Toolkit.getDefaultToolkit().getScreenSize();
setBounds((screenSize.width-229)/2, (screenSize.height-170)/2, 229, 170);
}
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new NewJFrame().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JTable jTable1;
// End of variables declaration
}
class MyHeaderRenderer extends DefaultTableCellRenderer {
JLabel comp;
private int pos = -1;
public MyHeaderRenderer() {
super();
comp = new JLabel("");
comp.setHorizontalAlignment(JLabel.CENTER);
comp.setFont(new Font("Tahoma", Font.PLAIN, 12));
comp.setBorder(BorderFactory.createBevelBorder(BevelBorder.RAISED));
comp.setOpaque(true);
}
public Component getTableCellRendererComponent(JTable table, Object value,
boolean isSelected, boolean hasFocus, int row, int column) {
comp.setText(value.toString());
if (column == getPos()) {
comp.setBackground(Color.GREEN);
} else if (column != -1) {
comp.setBackground(Color.WHITE);
}
return comp;
}
public int getPos() {
return pos;
}
public void setPos(int pos) {
this.pos = pos;
}
}
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