Custom box for individual rows and columns

Question

puuuuuuf, I'm starting to like swing :) I'm trying to write cellRenderer to set up all the cells except those in the first row and column. So I wrote the following:

public class CustomTableCellRenderer extends DefaultTableCellRenderer { public Component getTableCellRendererComponent(JTable table, Object obj, boolean isSelected, boolean hasFocus, int row, int column) { Component cell = super.getTableCellRendererComponent(table, obj, isSelected, hasFocus, row, column); if(row >0&&column>0){ cell.setBackground(Color.GREEN); } return cell; } } 

and set the rendering as follows:

 scheduleTable.setDefaultRenderer(Object.class, new CustomTableCellRenderer()); 

but for some reason, this approach applies a renderer to the entire cell. So they are all Green. If I do something wrong, could you help me?

Thanks in advance!

Addition

 scheduleTable = new JTable() { @Override public Component prepareRenderer(TableCellRenderer renderer, int row, int column) { Component comp = super.prepareRenderer(renderer, row, column); int modelRow = convertRowIndexToModel(row); int modelColumn = convertColumnIndexToModel(column); if (modelColumn != 0 && modelRow != 0) { comp.setBackground(Color.GREEN); } return comp; } }; 

this code makes the whole table green.

This code:

 scheduleTable = new JTable(tableModel) { @Override public Component prepareRenderer(TableCellRenderer renderer, int row, int column) { Component comp = super.prepareRenderer(renderer, row, column); int modelRow = convertRowIndexToModel(row); int modelColumn = convertColumnIndexToModel(column); if (modelRow != 0 && modelColumn != 0) { setBackground(Color.GREEN); } else { setBackground(Color.WHITE); } return comp; } }; 

gives the following result: (

The following situations I have with different n in the expression row != 0 && column != 0 :

Answer 1

• you can use prepareRenderer , simpler and more convenient than XxxCellRenderer

• great code example Displaying table rows by @camickr

EDIT:

 if (modelColumn != 0 || modelRow != 0) { 

and if (modelColumn != 0 && modelRow != 0) {

from code

 import java.awt.*; import java.awt.font.TextAttribute; import java.util.Map; import javax.swing.*; import javax.swing.border.Border; import javax.swing.border.CompoundBorder; import javax.swing.border.EmptyBorder; import javax.swing.border.MatteBorder; import javax.swing.table.*; public class TablePrepareRenderer extends JFrame { private static final long serialVersionUID = 1L; private JTable table; public TablePrepareRenderer() { Object[] columnNames = {"Type", "Company", "Shares", "Price", "Boolean"}; Object[][] data = { {"Buy", "IBM", new Integer(1000), new Double(80.50), false}, {"Sell", "MicroSoft", new Integer(2000), new Double(6.25), true}, {"Sell", "Apple", new Integer(3000), new Double(7.35), true}, {"Buy", "Nortel", new Integer(4000), new Double(20.00), false} }; DefaultTableModel model = new DefaultTableModel(data, columnNames) { private static final long serialVersionUID = 1L; @Override public Class getColumnClass(int column) { return getValueAt(0, column).getClass(); } }; table = new JTable(model) { private static final long serialVersionUID = 1L; private Border outside = new MatteBorder(1, 0, 1, 0, Color.red); private Border inside = new EmptyBorder(0, 1, 0, 1); private Border highlight = new CompoundBorder(outside, inside); @Override public Component prepareRenderer(TableCellRenderer renderer, int row, int column) { int modelRow = convertRowIndexToModel(row); int modelColumn = convertColumnIndexToModel(column); if (!isRowSelected(modelRow)) { if (modelColumn != 0 || modelRow != 0) { comp.setBackground(Color.GREEN); } else { comp.setBackground(table.getBackground()); } } return comp; /*Component comp = super.prepareRenderer(renderer, row, column); JComponent jc = (JComponent) comp; Map attributes = (new Font("Serif", Font.PLAIN, 12)).getAttributes(); //attributes.put(TextAttribute.WEIGHT, TextAttribute.WEIGHT_BOLD); attributes.put(TextAttribute.STRIKETHROUGH, TextAttribute.STRIKETHROUGH_ON); if (!isRowSelected(row)) { comp.setForeground(Color.black); comp.setBackground(row % 2 == 0 ? Color.white : Color.orange); int modelRow = convertRowIndexToModel(row); String type = (String) getModel().getValueAt(modelRow, 0); if (type.equals("Sell")) { comp.setFont(new Font(attributes)); comp.setForeground(Color.red); } else { comp.setFont(new Font("Serif", Font.BOLD, 12)); } } else { comp.setFont(table.getFont()); } jc.setBorder(BorderFactory.createCompoundBorder(jc.getBorder(), BorderFactory.createEmptyBorder(0, 0, 0, 5))); return comp;*/ } }; table.setPreferredScrollableViewportSize(table.getPreferredSize()); JScrollPane scrollPane = new JScrollPane(table); getContentPane().add(scrollPane); } public static void main(String[] args) { SwingUtilities.invokeLater(new Runnable() { @Override public void run() { TablePrepareRenderer frame = new TablePrepareRenderer(); frame.setDefaultCloseOperation(EXIT_ON_CLOSE); frame.pack(); frame.setLocationRelativeTo(null); frame.setVisible(true); } }); } } 

Answer 2

Use row and column value without conversion to model