如何在 Java 中为 JTable 的各列设置背景/前景颜色?
JTable 是 JComponent 类的子类,用于展示复杂数据结构。JTable 组件可以遵循 模型视图控制器(MVC)设计模式,将数据呈现在行和列中。JTable 可以生成 TableModelListener、TableColumnModelListener、ListSelectionListener、CellEditorListener、RowSorterListener 接口。我们可以通过自定义 DefaultTableCellRenderer 类来更改 JTable 各列的背景色和前景色,并且这个类只有一个方法 getTableCellRendererComponent() 来执行它。
示例
import java.awt.*;
import javax.swing.*;
import javax.swing.table.*;
public class JTableColumnColorTest extends JFrame {
private JTable table;
private TableColumn tColumn;
public JTableColumnColorTest() {
setTitle("JTableColumnColor Test");
table = new JTable(10, 5);
tColumn = table.getColumnModel().getColumn(2);
tColumn.setCellRenderer(new ColumnColorRenderer(Color.lightGray, Color.red));
add(new JScrollPane(table), BorderLayout.CENTER);
setSize(400, 300);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setLocationRelativeTo(null);
setVisible(true);
}
public static void main(String [] args) {
new JTableColumnColorTest();
}
}
// Customize the code to set the background and foreground color for each column of a JTable
class ColumnColorRenderer extends DefaultTableCellRenderer {
Color backgroundColor, foregroundColor;
public ColumnColorRenderer(Color backgroundColor, Color foregroundColor) {
super();
this.backgroundColor = backgroundColor;
this.foregroundColor = foregroundColor;
}
public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
Component cell = super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, column);
cell.setBackground(backgroundColor);
cell.setForeground(foregroundColor);
return cell;
}
}输出
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