如何为JTable中的特定行着色

我希望能够突出显示某些JTable行，具体取决于行本身的值。 例如，如果现有的qty < reorder level ，那么该行应该在JTable突出显示。

我知道有一个表方法tblItems.setSelectionBackground(Color.yellow); 在选择行时有效，但有没有类似的方法不依赖于被选中的行以使它们以不同的颜色显示？

 public class MyTableCellRenderer implements TableCellRenderer { @Override public Component getTableCellRendererComponent (JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) { Object ob=table.getValueAt(row, column); if(ob.toString().equals("yes")){ //need to colour the entire row } return } } 

Answer 1

你可以用我的答案来改变细胞的颜色。 可以使用相同的技术将其应用于行中的每个单元格。

这也是prepareRenderer示例

 import javax.swing.*; import javax.swing.table.AbstractTableModel; import javax.swing.table.TableCellRenderer; import java.awt.*; public class TableWithPrepareRendererExample extends JFrame { ColorName colors[] = { new ColorName("Red"), new ColorName("Green"), new ColorName("Blue"), new ColorName("Black"), new ColorName("White") }; public TableWithPrepareRendererExample() { super("Table With prepareRenderer Example"); setSize(500, 300); setDefaultCloseOperation(EXIT_ON_CLOSE); JTable table = new JTable(new AbstractTableModel() { ColorName data[] = { colors[0], colors[1], colors[2], colors[3], colors[4], colors[0], colors[1], colors[2], colors[3], colors[4] }; public int getColumnCount() { return 3; } public int getRowCount() { return 10; } public Object getValueAt(int r, int c) { switch (c) { case 0: return (r + 1) + "."; case 1: return "Some pithy quote #" + r; case 2: return data[r]; } return "Bad Column"; } public Class getColumnClass(int c) { if (c == 2) return ColorName.class; return String.class; } public boolean isCellEditable(int r, int c) { return c == 2; } public void setValueAt(Object value, int r, int c) { data[r] = (ColorName) value; } }) { public Component prepareRenderer(TableCellRenderer renderer, int rowIndex, int vColIndex) { Component c = super.prepareRenderer(renderer, rowIndex, vColIndex); Object value = getValueAt(rowIndex, vColIndex); if (value.toString().equals("Red")) c.setBackground(Color.RED); else { if (rowIndex % 2 == 0 && !isCellSelected(rowIndex, vColIndex)) { c.setBackground(Color.YELLOW); } else { // If not shaded, match the table's background c.setBackground(getBackground()); } } return c; } }; JComboBox combo = new JComboBox(colors); table.setDefaultEditor(ColorName.class, new DefaultCellEditor(combo)); table.setRowHeight(20); getContentPane().add(new JScrollPane(table)); } public static void main(String args[]) { TableWithPrepareRendererExample ex = new TableWithPrepareRendererExample(); ex.setVisible(true); } public class ColorName { String cname; public ColorName(String name) { cname = name; } public String toString() { return cname; } } } 

Answer 2

我这样做的方法是修改JTable用来绘制表格单元格的代码……

实现自己的TableCellRenderer 。 在getTableCellRendererComponent()方法中，检查qty Component上的setBackgroundColor() 。 编写TableCellRenderer的最简单方法是查看JTable使用的现有TableCellRenderer的源代码 – 它只有1个方法，你基本上可以复制它并添加一些代码来进行颜色检查。 您使用setDefaultRenderer()在JTable上设置TableCellRenderer

正如@mKorbel在评论中所提到的，你也可以通过覆盖JTable prepareRenderer()方法来实现类似的function。

它并不难，特别是如果你查看现有的Java源代码，看看它们是如何做到的。

Answer 3

 private JTable table; private SimpleDateFormat sdf = new SimpleDateFormat("dd.MM.yyyy"); public TablePrepareRenderer() { Object[] columnNames = { "Type", "Company", "Name", "Salery", "Designation" }; Object[][] data = { { "Probation", "Digital Research Lab", "Kamran Ali", "500,000", "Java Developer" }, { "Permenent", "Netsole", "Farhan Khan", "80,000", "System Administaror" }, { "Contract", "System Limited", "Danyal", "100,000", "Network Administrator" }, { "Probation", "TeraData", "Ali Raza", "45,000", "IT Officer" }, { "Contract", "MicroSoft", "Sikandar Hayat", "450,000", "Team Lead" }, { "Permenent", "MicroSoft", "Adnan", "30,000", "Driver" }, }; 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; @Override public Component prepareRenderer(TableCellRenderer renderer, int row, int column) { Component c = super.prepareRenderer(renderer, row, column); if (!isRowSelected(row)) { if (table.getColumnCount() >= 0) { String type = (String)getModel().getValueAt(row, 0); if (type.equalsIgnoreCase("Probation")) { c.setBackground(new Color(198, 190, 255)); } if (type.equalsIgnoreCase("Permenent")) { c.setBackground(new Color(14, 255, 190)); } if (type.equalsIgnoreCase("Contract")) { c.setBackground(Color.green); } } } if (isRowSelected(row) && isColumnSelected(column)) { ((JComponent)c).setBorder(new LineBorder(Color.red)); } return c; } }; 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.setLocation(150, 150); frame.setSize(800, 500); frame.setVisible(true); } }); } 

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