AbstractTableModel中设置字体的方法

在AbstractTableModel的子类中重写getColumnClass方法，返回JComponent.class，然后在JTable中使用setDefaultRenderer方法设置渲染器并自定义实现，即可在JTable中设置字体。

示例代码：

import javax.swing.*;
import javax.swing.table.AbstractTableModel;
import javax.swing.table.DefaultTableCellRenderer;
import java.awt.*;

public class FontTableModel extends AbstractTableModel {
    private Object[][] data;
    private String[] columns;

    public FontTableModel(Object[][] data, String[] columns) {
        this.data = data;
        this.columns = columns;
    }

    @Override
    public int getRowCount() {
        return data.length;
    }

    @Override
    public int getColumnCount() {
        return columns.length;
    }

    @Override
    public String getColumnName(int columnIndex) {
        return columns[columnIndex];
    }

    @Override
    public Object getValueAt(int rowIndex, int columnIndex) {
        return data[rowIndex][columnIndex];
    }

    @Override
    public Class<?> getColumnClass(int columnIndex) {
        return JComponent.class;
    }
}

class FontTableCellRenderer extends DefaultTableCellRenderer {
    private Font font;

    public FontTableCellRenderer(Font font) {
        this.font = font;
    }

    @Override
    public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected,
                                                   boolean hasFocus, int row, int column) {
        JComponent component = (JComponent) super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, column);
        component.setFont(font);
        return component;
    }
}

class MainFrame extends JFrame {
    public MainFrame() {
        Object[][] data = {
                {"John", "Doe", 30},
                {"Jane", "Doe", 25}
        };
        String[] columns = {"First Name", "Last Name", "Age"};

        FontTableModel model = new FontTableModel(data, columns);
        JTable table = new JTable(model);

        Font font = new Font("Serif", Font.BOLD, 16);
        table.setDefaultRenderer(JComponent.class, new FontTableCellRenderer(font));

        add(new JScrollPane(table));

        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        pack();
        setLocationRelativeTo(null);
        setVisible(true);
    }
}

public class FontTableDemo {