Question

I have added a table, but the problem is, the panel doesnt show its background color. I have tried setting scrollpane background color, etc. But it doesn’t work. The frame has a button ‘Verify’, which when clicked, displays a table beneath it. Until it is clicked, the portion where the table will appear is solid gray. I want the whole portion to be ivory background. Kindly help me diagnose the problem.

try
{
    Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
    Connection conn1=DriverManager.getConnection("jdbc:odbc:vasantham","","");
    Statement st1=conn1.createStatement();
    ResultSet rs1=st1.executeQuery("select * from try where DATEDIFF('d',NOW(),exdate) < 61 order by tname");
    ResultSetMetaData md1=rs1.getMetaData();
    int cols1=md1.getColumnCount();
    model1=new DefaultTableModel();
    model1.addColumn("Purpose");
    model1.addColumn("Name");
    model1.addColumn("Composition");
    model1.addColumn("Expiry");
    model1.addColumn("Stock");
    model1.addColumn("Cost");
    model1.addColumn("Type");
    model1.addColumn("Supplier");
    model1.addColumn("Supplier Number");
    model1.addColumn("Rack");
    table1=new JTable(model1);
    Color ivory=new Color(255,255,208);
    table1.setOpaque(false);
    table1.setBackground(ivory);
    String[] tabledata1=new String[cols1];
    int i=0;
    while(rs1.next())
    {
        for(i=0;i<cols1;i++)
        {
            if(i==3)
            {
                Date intr1=(rs1.getDate(i+1));
                tabledata1[i]=formatter1.format(intr1);
            }
            else
            tabledata1[i]=rs1.getObject(i+1).toString();
        }
        model1.addRow(tabledata1);
    }
    JScrollPane scroll1 = new JScrollPane(table1);
    scroll1.setBackground(new Color(255,255,208));
    scroll1.getViewport().setBackground(ivory);
    panel1.setLayout(new BorderLayout());
    panel1.setBackground(ivory);
    table1.getTableHeader().setBackground(ivory);
    panel1.add(scroll1,BorderLayout.CENTER);
    frame1.add(panel1,BorderLayout.CENTER);
    conn1.close();
}

Answer 1

Scroll Panes contain another component, known as the ViewPort. This is actually where the components been assigned to the scroll pane get added.

If you want to maintain the JTable as transparent (table1.setOpaque(false);), then you need to change the view ports background

scroll1.getViewport().setBackground(ivory);

Otherwise, set the table to opaque and table1.setFillsViewportHeight(true); to force the table to fill the entire viewport

UPDATED

Works fine for me

model1 = new DefaultTableModel();
model1.addColumn("Purpose");
model1.addColumn("Name");
model1.addColumn("Composition");
model1.addColumn("Expiry");
model1.addColumn("Stock");
model1.addColumn("Cost");
model1.addColumn("Type");
model1.addColumn("Supplier");
model1.addColumn("Supplier Number");
model1.addColumn("Rack");

for (int index = 0; index < 10; index++) {

    Vector vector = new Vector();
    vector.add("p" + index);
    vector.add("n" + index);
    vector.add("c" + index);
    vector.add("e" + index);
    vector.add("s" + index);
    vector.add("c" + index);
    vector.add("t" + index);
    vector.add("s" + index);
    vector.add("s" + index);
    vector.add("r" + index);

    model1.addRow(vector);

}

table1 = new JTable(model1);
Color ivory = new Color(255, 255, 208);
table1.setOpaque(true);
table1.setFillsViewportHeight(true);
table1.setBackground(ivory);

JScrollPane scroll1 = new JScrollPane(table1);
table1.getTableHeader().setBackground(ivory);
add(scroll1, BorderLayout.CENTER);

You can comment out the row creation section and it will still paint in ivory.