Setting row color in JTable

Question

I am trying to display some rows in a JTable in a different color regardless of selection status. The row color criteria would be from data from the object in the row, i.e., given a certain status of a record, I would want to show it as red instead of black.

Answer 1

A few optimizations:
class StatusColorRenderer
extends DefaultTableCellRenderer
    public StatusColorRenderer()
        // super(); not needed, call by default
        setOpaque(true);
        // DefaultTableCellRenderer returns itself as a CellRenderer Component, it extends JLabel so you can call setOpaque on it
// since this method is called at every paint for every cell it should be HIGHLY optimized
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);
    MyObjectClass myObject  = ( MyObjectClass ) myTableModel.getMyVector().elementAt(row);
    <SomeClass> myStatus = myObject.getTheStatus();
    if ( myStatus.compareTo(Status.BAD_STAT) == 0)
        c.setForeground(Color.red);
    else if (myStatus.compareTo(Status.IN_PROGRESS) == 0)
        c.setForeground(Color.green);
    else if ( myObject.getOtherFactor().compareTo(OtherFactors.NOT_DEFAULT) ==  0)
        c.setForeground(Color.blue);
    else
        c.setForeground(Color.black);
    // c.repaint(); NEVER DO THAT
    return c;
StatusColorRenderer myRenderer = new StatusColorRenderer();
// only one instance of the renderer
for ( int i = myTableModel.getColumnCount() - 1 ; i >= 0 ; i-- )
   //column = myTable.getColumnModel().getColumn( i );
   myTable.setDefaultRenderer( myTable.getColumnClass( i ),
                                            myRenderer );
}Comment:
AbstractTableModel and DefaultTableModel.getColumnClass method returns Object.class, it is used by the JTable to setup the editor and the renderer of a column
so if you're using the DefaultTableModel and JTable without overriden getColumnClass, you can set a generic renderer for your JTable by using:
myTable.setDefaultRenderer( Object.class, myRenderer );