在JTable中更改一个单元格的背景颜色

可能重复：
更改Swing JTable单元格颜色

我开发了一个显示JTable的swing应用程序。 我希望当用户修改单元格值时，单元格修改了更改颜色。

这是我在用户修改单元格时运行的代码：

this.myTable.getColumnModel().getColumn(column).setCellRenderer(new StatusColumnCellRenderer()); 

这是我的单元格Render类的代码：

 public class StatusColumnCellRenderer extends DefaultTableCellRenderer { @Override public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int col) { //Cells are by default rendered as a JLabel. JLabel l = (JLabel) super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, col); //Get the status for the current row. TableModelLotti tableModel = (TableModelLotti) table.getModel(); if(isSelected) l.setBackground(Color.GREEN); //Return the JLabel which renders the cell. return l; } } 

Answer 1

在模型中标记修改了单元格时，您需要自定义渲染器才能显示绿色。

您还需要一个自定义编辑器，在此处提到的stopCellEditing()实现中设置模型的修改状态。

此处显示了自定义渲染器和编辑器的相关示例。

附录：这是所描述方法的一个例子。

 import java.awt.Color; import java.awt.Component; import java.awt.EventQueue; import java.util.ArrayList; import java.util.List; import javax.swing.DefaultCellEditor; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.JTable; import javax.swing.JTextField; import javax.swing.table.AbstractTableModel; import javax.swing.table.DefaultTableCellRenderer; /** * @see https://stackoverflow.com/a/12352838/230513 */ public class ModifiedCells extends JPanel { public ModifiedCells() { final MyModel model = new MyModel(); JTable table = new JTable(model); table.setDefaultRenderer(String.class, new MyRenderer()); table.setDefaultEditor(String.class, new MyEditor(table)); this.add(table); } private static class MyRenderer extends DefaultTableCellRenderer { Color backgroundColor = getBackground(); @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); MyModel model = (MyModel) table.getModel(); if (model.getState(row)) { c.setBackground(Color.green.darker()); } else if (!isSelected) { c.setBackground(backgroundColor); } return c; } } private static class MyEditor extends DefaultCellEditor { private JTable table; private MyModel model; public MyEditor(JTable table) { super(new JTextField()); this.table = table; this.model = (MyModel) table.getModel(); } @Override public boolean stopCellEditing() { model.setState(table.getEditingRow(), true); return super.stopCellEditing(); } } private static class MyModel extends AbstractTableModel { private final List list = new ArrayList(); public MyModel() { list.add(new Row("One", true)); list.add(new Row("Two", false)); list.add(new Row("Three", false)); } public boolean getState(int row) { return list.get(row).state.booleanValue(); } public void setState(int row, boolean state) { list.get(row).state = state; } @Override public int getRowCount() { return list.size(); } @Override public int getColumnCount() { return 1; } @Override public Object getValueAt(int row, int col) { return list.get(row).name; } @Override public void setValueAt(Object aValue, int row, int col) { list.get(row).name = (String) aValue; fireTableCellUpdated(row, col); } @Override public boolean isCellEditable(int rowIndex, int columnIndex) { return true; } @Override public Class getColumnClass(int columnIndex) { return String.class; } private static class Row { private String name; private Boolean state; public Row(String name, Boolean state) { this.name = name; this.state = state; } } } private void display() { JFrame f = new JFrame("ModifiedCells"); f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); f.add(this); f.pack(); f.setLocationRelativeTo(null); f.setVisible(true); } public static void main(String[] args) { EventQueue.invokeLater(new Runnable() { @Override public void run() { new ModifiedCells().display(); } }); } }