Java JTable Alternate Row Color not working

Question

Why this following code not working? where is the problem? My jTable is initiated as jTable1;

jTable1.setDefaultRenderer(Object.class,new TableCellRenderer(){

            @Override
            public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
                Component c = (Component) table.getCellRenderer(row, column);
                c.setBackground(row%2==0 ? Color.white : Color.yellow);                        
                return c;
            };

        });

score 22 · Answer 1 · answered Oct 26 '14 at 19:18

22

Recently while going through the source code of javax.swing.table.DefaultTableCellRenderer, I found following simple solution which will provide alternate row coloring for all tables in an application.

In the code, just after setting default look and feel insert following code:

UIDefaults defaults = UIManager.getLookAndFeelDefaults();
if (defaults.get("Table.alternateRowColor") == null)
    defaults.put("Table.alternateRowColor", new Color(240, 240, 240));

answered Oct 26 '14 at 19:18

bbhar

599
5
8

OK, thanks, I learned, that reading documentation & source code actually can help :-) – Christof Kälin Oct 28 '16 at 15:35
Note: custom cell renderers may override the background color. – ceklock Apr 06 '17 at 17:38
How to use this? I'm new to netbeans – FSm Mar 19 '18 at 14:36

score 5 · Answer 2 · edited May 23 '17 at 12:10

5

override prepareRenderer for decorating whole row
for example based on Table Row Rendering by @camickr

edited May 23 '17 at 12:10

Community

1
1

answered Jul 20 '13 at 12:31

mKorbel

109,525
20
134
319

Joop Eggen · Answer 3 · 2015-07-02T13:45:44.523

4

jTable1.setDefaultRenderer(Object.class, new DefaultTableCellRenderer() {

        @Override
        public Component getTableCellRendererComponent(JTable table, 
                Object value, boolean isSelected, boolean hasFocus,
                int row, int column) {
            Component c = super.getTableCellRendererComponent(table, 
                value, isSelected, hasFocus, row, column);
            c.setBackground(row%2==0 ? Color.white : Color.yellow);                        
            return c;
        };
    });

The main error is the querying of the table for its renderer. If you have other column renderers you have to solve it there too.

edited Jul 02 '15 at 13:45

answered Jul 20 '13 at 12:31

Joop Eggen

107,315
7
83
138

It shows super.getTableCellRendererComponent symbol not found – Iqbal Hossain Jul 20 '13 at 12:39
Corrected the answer, I almost always use the DefaultTableCellRenderer, and oversaw you using the interface. – Joop Eggen Jul 20 '13 at 14:25

Iqbal Hossain · Answer 4 · 2013-07-20T13:46:27.177

The Correct answer is as follows for me...

jTable1.setDefaultRenderer(Object.class, new TableCellRenderer(){
            private DefaultTableCellRenderer DEFAULT_RENDERER =  new DefaultTableCellRenderer();
            @Override
            public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
                Component c = DEFAULT_RENDERER.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, column);
                if (row%2 == 0){
                    c.setBackground(Color.WHITE);
                }
                else {
                    c.setBackground(Color.LIGHT_GRAY);
                }                        
                return c;
            }

        });

score 2 · Answer 5 · answered Jun 04 '20 at 21:26

2

The easiest way is:

UIDefaults defaults = UIManager.getLookAndFeelDefaults();
defaults.putIfAbsent("Table.alternateRowColor", Color.LIGHT_GRAY);

This will affect all the tables in your class.

answered Jun 04 '20 at 21:26

Ionut Ovidiu Georgescu

53
7

score 1 · Answer 6 · answered Jul 20 '13 at 12:26

Try this one.... REFER

JTable table = new JTable(){
    public Component prepareRenderer(TableCellRenderer renderer, int row, int column){
        Component returnComp = super.prepareRenderer(renderer, row, column);
        Color alternateColor = new Color(252,242,206);
        Color whiteColor = Color.WHITE;
        if (!returnComp.getBackground().equals(getSelectionBackground())){
            Color bg = (row % 2 == 0 ? alternateColor : whiteColor);
            returnComp .setBackground(bg);
            bg = null;
        }
        return returnComp;
};

Java JTable Alternate Row Color not working

6 Answers6

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